Relevant bibliographies by topics / Bose-Einstein condensate

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers
Reports

Academic literature on the topic 'Bose-Einstein condensate'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 January 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Bose-Einstein condensate.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Bose-Einstein condensate"

SHI, YU. "ENTANGLEMENT BETWEEN BOSE–EINSTEIN CONDENSATES." International Journal of Modern Physics B 15, no. 22 (September 10, 2001): 3007–30. http://dx.doi.org/10.1142/s0217979201007154.

Full text

Abstract:

For a Bose condensate in a double-well potential or with two Josephson-coupled internal states, the condensate wavefunction is a superposition. Here we consider coupling two such Bose condensates, and suggest the existence of a joint condensate wavefunction, which is in general a superposition of all products of the bases condensate wavefunctions of the two condensates. The corresponding many-body state is a product of such superposed wavefunctions, with appropriate symmetrization. These states may be potentially useful for quantum computation. There may be robustness and stability due to macroscopic occupation of a same single particle state. The nonlinearity of the condensate wavefunction due to particle–particle interaction may be utilized to realize nonlinear quantum computation, which was suggested to be capable of solving NP-complete problems.

APA, Harvard, Vancouver, ISO, and other styles

Öztürk, Fahri Emre, Tim Lappe, Göran Hellmann, Julian Schmitt, Jan Klaers, Frank Vewinger, Johann Kroha, and Martin Weitz. "Observation of a non-Hermitian phase transition in an optical quantum gas." Science 372, no. 6537 (April 1, 2021): 88–91. http://dx.doi.org/10.1126/science.abe9869.

Full text

Abstract:

Quantum gases of light, such as photon or polariton condensates in optical microcavities, are collective quantum systems enabling a tailoring of dissipation from, for example, cavity loss. This characteristic makes them a tool to study dissipative phases, an emerging subject in quantum many-body physics. We experimentally demonstrate a non-Hermitian phase transition of a photon Bose-Einstein condensate to a dissipative phase characterized by a biexponential decay of the condensate’s second-order coherence. The phase transition occurs because of the emergence of an exceptional point in the quantum gas. Although Bose-Einstein condensation is usually connected to lasing by a smooth crossover, the observed phase transition separates the biexponential phase from both lasing and an intermediate, oscillatory condensate regime. Our approach can be used to study a wide class of dissipative quantum phases in topological or lattice systems.

APA, Harvard, Vancouver, ISO, and other styles

Yang, Yajie, and Ying Dong. "Dynamics of matter-wave solitons in three-component Bose-Einstein condensates with time-modulated interactions and gain or loss effect." Physica Scripta 97, no. 2 (January 13, 2022): 025201. http://dx.doi.org/10.1088/1402-4896/ac47b9.

Full text

Abstract:

Abstract The gain or loss effect on the dynamics of the matter-wave solitons in three-component Bose–Einstein condensates with time-modulated interactions trapped in parabolic external potentials are investigated analytically. Some exact matter-wave soliton solutions to the three-coupled Gross–Pitaevskii equation describing the three-component Bose–Einstein condensates are constructed by similarity transformation. The dynamical properties of the matter-wave solitons are analyzed graphically, and the effects of the gain or loss parameter and the frequency of the external potentials on the matter-wave solitons are explored. It is shown that the gain coefficient makes the atom condensate to absorb energy from the background, while the loss coefficient brings about the collapse of the condensate.

APA, Harvard, Vancouver, ISO, and other styles

Castellanos, Elías. "Homogeneous one-dimensional Bose–Einstein condensate in the Bogoliubov’s regime." Modern Physics Letters B 30, no. 22 (August 20, 2016): 1650307. http://dx.doi.org/10.1142/s0217984916503073.

Full text

Abstract:

We analyze the corrections caused by finite size effects upon the ground state properties of a homogeneous one-dimensional (1D) Bose–Einstein condensate. We assume from the very beginning that the Bogoliubov’s formalism is valid and consequently, we show that in order to obtain a well-defined ground state properties, finite size effects of the system must be taken into account. Indeed, the formalism described in the present paper allows to recover the usual properties related to the ground state of a homogeneous 1D Bose–Einstein condensate but corrected by finite size effects of the system. Finally, this scenario allows us to analyze the sensitivity of the system when the Bogoliubov’s regime is valid and when finite size effects are present. These facts open the possibility to apply these ideas to more realistic scenarios, e.g. low-dimensional trapped Bose–Einstein condensates.

APA, Harvard, Vancouver, ISO, and other styles

Wilson, Andrew C., and Callum R. McKenzie. "Experimental Aspects of Bose-Einstein Condensation." Modern Physics Letters B 14, supp01 (September 2000): 281–303. http://dx.doi.org/10.1142/s0217984900001579.

Full text

Abstract:

An introductory level review of experimental techniques essential for producing and probing Bose condensates formed with dilute alkali vapours is presented. This discussion includes a summary of evaporative cooling techniques, condensate imaging schemes, and a review of current BEC technology.

APA, Harvard, Vancouver, ISO, and other styles

SCHELLE, ALEXEJ. "QUANTUM FLUCTUATION DYNAMICS DURING THE TRANSITION OF A MESOSCOPIC BOSONIC GAS INTO A BOSE–EINSTEIN CONDENSATE." Fluctuation and Noise Letters 11, no. 04 (December 2012): 1250027. http://dx.doi.org/10.1142/s0219477512500277.

Full text

Abstract:

The condensate number distribution during the transition of a dilute, weakly interacting gas of N = 200 bosonic atoms into a Bose–Einstein condensate is modeled within number conserving master equation theory of Bose–Einstein condensation. Initial strong quantum fluctuations occuring during the exponential cycle of condensate growth reduce in a subsequent saturation stage, before the Bose gas finally relaxes towards the Gibbs–Boltzmann equilibrium.

APA, Harvard, Vancouver, ISO, and other styles

CIAMPINI, DONATELLA, OLIVER MORSCH, and ENNIO ARIMONDO. "SIGNATURES OF DYNAMICAL INSTABILITY OF BOSE–EINSTEIN CONDENSATES IN 1D OPTICAL LATTICES." Fluctuation and Noise Letters 12, no. 02 (June 2013): 1340006. http://dx.doi.org/10.1142/s0219477513400063.

Full text

Abstract:

The onset of dynamical instabilities of Bose–Einstein condensates in optical lattices due to the dephasing of the condensate wavefunction is observed through the decay of the visibility of the interference pattern in time-of-flight and the growth of the radial width of the condensate.

APA, Harvard, Vancouver, ISO, and other styles

TSURUMI, TAKEYA, HIROFUMI MORISE, and MIKI WADATI. "STABILITY OF BOSE–EINSTEIN CONDENSATES CONFINED IN TRAPS." International Journal of Modern Physics B 14, no. 07 (March 20, 2000): 655–719. http://dx.doi.org/10.1142/s0217979200000595.

Full text

Abstract:

Bose–Einstein condensation has been realized as dilute atomic vapors. This achievement has generated immense interest in this field. This article review of recent theoretical research into the properties of trapped dilute-gas Bose–Einstein condensates. Among these properties, stability of Bose–Einstein condensates confined in traps is mainly discussed. Static properties of the ground state are investigated by using the variational method. The analysis is extended to the stability of two-component condensates. Time-development of the condensate is well-described by the Gross–Pitaevskii equation which is known in nonlinear physics as the no nlinear Schrödinger equation. For the case that the inter-atomic potential is effectively attractive, a singularity of the solution emerges in a finite time. This phenomenon which we call collapse explains the upper bound for the number of atoms in such condensates under traps.

APA, Harvard, Vancouver, ISO, and other styles

PÉREZ ROJAS, H., A. PÉREZ MARTÍNEZ, and HERMAN J. MOSQUERA CUESTA. "COLLAPSING NEUTRON STARS DRIVEN BY CRITICAL MAGNETIC FIELDS AND EXPLODING BOSE–EINSTEIN CONDENSATES." International Journal of Modern Physics D 14, no. 11 (November 2005): 1855–60. http://dx.doi.org/10.1142/s0218271805007516.

Full text

Abstract:

A Bose–Einstein condensate of a neutral vector boson bearing an anomalous magnetic moment is suggested as a model for ferromagnetic origin of magnetic fields in neutron stars. The vector particles are assumed to arise from parallel spin-paired neutrons. A negative pressure perpendicular to the external field B is acting on this condensate, which for large densities, compress the system, and may produce a collapse. An upper bound of the magnetic fields observable in neutron stars is given. In the the non-relativistic limit, the analogy with the behavior of exploding Bose–Einstein condensates (BECs) for critical values of the magnetic field is briefly discussed.

APA, Harvard, Vancouver, ISO, and other styles

Zeng, Heping, Weiping Zhang, and Fucheng Lin. "Nonclassical Bose-Einstein condensate." Physical Review A 52, no. 3 (September 1, 1995): 2155–60. http://dx.doi.org/10.1103/physreva.52.2155.

Full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Bose-Einstein condensate"

Palacios, Álvarez Silvana. "Single domain spinor Bose-Einstein condensate." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/458123.

Full text

Abstract:

This work reports on the construction of a new-generation system capable to create single-mode spinor Bose-Einstein condensates of 87Rb, and non-destructively probe them using optical Faraday rotation. This system brings together many of the stateof-the-art technologies in ultra-cold physics in a minimalist design which was possible due to the prolific advances in the field respect to the pioneering experiments (Cornell's, Ketterle's, and Chapman's groups). There is rich phenomena that can be potentially studied in this system from the study of predicted novel quantum phases and topologies to entanglement and spin squeezing which are useful for quantum information and interferometry. The potential of this system make it suitable to answer fundamental questions on the phase transition to a condensed and ferromagnetic state. In particular, this work describes theoretically and experimentally, the atomic spin coherence, which is relevant for applications like coherent sensing of magnetic fields. In this direction, our findings demonstrate the characteristics of our system make it a sensor with the best predicted energy resolution per unit bandwidth (~10^-2 h) among all the different technologies applied to magnetometry. The thesis is structured as follows: Part I is dedicated to the mathematical description of the relevant interactions. First, the interaction of optical polarization and atomic spin polarization is reviewed, with special attention to ac-Stark shifts, which are used to generate a conservative trapping potential and Faraday rotation effects that are used for non-destructive spin detection. Second, the interaction of the atoms with a magnetic field is presented. And finally, the mean-filed theory of spinor Bose-Einstein condensation is summarized. The dynamics of a spin-1system in this picture is described by a three-component Gross-Pitaevskii equation. Part II contains three chapters describing the implemented technologies and techniques used in the experiment to create and characterize a spinor condensate. The first chapter describes the ultrahigh vacuum, magnetic fields, lasers, spectroscopy and imaging needed to create a magneto optical trap (MOT) and transfer those atoms into an optical dipole trap (ODT). We implemented a non-standard loading technique based on the semicompensation of the strong differential lightshift induced by the ODT which profits from the effective dark-MOT created at the trap position. In the second chapter we detail, theoretically and experimentally, the all-optical evaporation process employed to achieve condensation in less than five second after the loading. In the final chapter the spin manipulation and read-out techniques are presented. Because there is no observable associated to the spin angle, we exploit the Faraday rotation effect and Stern-Gerlach imaging in order to retrieve information about the spin dynamics. Finally in Part III, we consider the potential of a spinor BEC as a magnetic sensor. The measurement of fundamental properties defining the sensitivity of the sensor are detailed. Those properties are the volume, the temporal coherence and the readout noise. We present a model of the magnetic field environment and its repercussion on the noise of the magnetometer. In the last chapter we present our perspectives to the possible applications of our system.
Este trabajo compila los detalles experimentales de un aparato de "nueva generación" capaz de crear condensados Espinoriales de 87Rb en un único dominio magnético, y de obtener información del estado de espín en una forma no destructiva explotando el efecto Faraday. Este aparato conjunta algunas de las tecnologías de punta aplicadas a física de gases ultrafrios en un diseño minimalista. Estas tecnologías se han podido desarrollar debido a los prolíficos avances en el campo, respecto a los experimentos pioneros en los grupos de Cornell, Ketterle y Chapman. Una rica cantidad de fenómenos pueden ser estudiados en este sistema, desde el estudio de novedosas fases y topologías cuánticas hasta la aplicación de entrelazamiento y estados comprimidos relevantes en información cuántica e interferometría. Su potencial lo hace un buen candidato para responder preguntas acerca de la naturaleza de las transiciones ferromagnética y de condensación. En particular, este trabajo describe teorética y experimentalmente la coherencia del estado de espín, el cual, es relevante en aplicaciones como la medición coherente de campos magnéticos. En este sentido, nuestros resultados demuestran que las características de nuestro condensado espinorial lo hacen el sensor con la mejor resolución en energía por unidad de ancho de banda (~10^-2 h ), de entre todas las tecnologías aplicadas a magnetometría. Esta tesis se estructura de la siguiente manera: Part I está dedicada a la descripción matemática de las interacciones relevantes. Primero la interacción entre la luz y el espín atómico es revisada, con especial énfasis en el desplazamiento ac-Stark, que es explotado para generar un potencial conservador, así como en las medidas no destructivas del espín via efecto Faraday. En segundo lugar, estudiamos la dinámica de espín bajo la interacción Zeeman entre los átomos y un campo magnético que varía en el tiempo. Finalmente es brevemente tratada la teoría de campo medio (mean-field theory) que describe los condensados espinoriales en la forma de una ecuación de Gross-Pitaevskii multicomponente. Part II contiene tres capítulos que detallan la tecnologías y técnicas usadas en el experimento para crear y caracterizar el condensado. El primer capítulo describe el ultra-alto vacío, los campos magnéticos, láseres, espectroscopía e imaging usados para crear una trampa magneto-óptica (MOT), y para transferir esos átomos en una trampa dipolar óptica (ODT). Nosotros implementamos una técnica poco estandard para cargar la ODT, la cual se basa en compensar medianamente el excesivo lightshift diferencial inducido por nuestra ODT. Esta técnica nos ayuda a crear una dark-MOT efectiva con la que podemos conseguir altas densidades de átoms en la ODT. En el segundo capítulo detallamos la evaporación que es "all-optical", con la que podemos conseguir un condensado en menos de 5 s de evaporación. En el capítulo final describimos las técnicas para crear arbitrarios estados de espín y cómo detectarlos. Para esto último explotamos el efecto Faraday y capturamos imágenes Stern-Gerlach. Finalmente en Part III, estudiamos las propiedades de coherencia, tiempo de vida y extensión espacial del condensado. Detallamos el sistema especialmente en el contexto de sensores magnéticos. Además, presentamos un modelo del campo magnético ambiental y sus repercusiones en el ruido del magnetómetro. En el último capítulo hablamos de algunas de las alternativas aplicaciones de nuestro sistema.

APA, Harvard, Vancouver, ISO, and other styles

Zawadzki, Mateusz. "Bose-Einstein condensate manipulation and interferometry." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=12801.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Floegel, Filip. "Optical loading of a Bose-Einstein condensate." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=970681119.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Leblanc, Pierre J. "Optical probing of a Bose-Einstein condensate." Thesis, University of Ottawa (Canada), 2003. http://hdl.handle.net/10393/26508.

Full text

Abstract:

Experimental results acquired with various methods used to optically probe an excitonic Bose-Einstein condensate are presented. The condensate is initially created by a high-intensity pulsed laser illumination (lambda = 532 nm) incident on a high-quality natural single crystal of Cu2O (at T = 1.8 K), having (100) symmetry. The travelling condensate is laterally probed by a laser pulse tuned at the 1S orthoexciton resonance (lambda = 609.51 nm), where significant condensate amplification is observed. Correspondingly, the resonant probing beam is additionally attenuated upon being transmitted through the excitonic packet. In an attempt to measure the condensate's lateral and longitudinal dimensions, the additional attenuation (NDA) is determined at various probing beam positions relative to the perpendicularly propagating packet. A three-dimensional representation of the exciton packet was constructed with spatially dependent NDA measurements. Highly detailed continuous spectra of the 1S line were taken with the use of a tunable dye laser, permitting the observation of never before seen features in the 1S line. The wavelength dependance of both the condensate amplification and the lateral pulse's additional attenuation were studied using this technique. The onset of a secondary exciton packet observed in various excitation geometries, further contributed to the amplification model proposed in previous work. Moreover, a strong correlation between electrical and all-optical measurements was found, providing reassurance on the validity of past interpretations based on electrical measurements.

APA, Harvard, Vancouver, ISO, and other styles

Palzer, Stefan. "Single impurities in a Bose-Einstein condensate." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Cavicchioli, Luca. "Image enhancement for a Bose-Einstein condensate interferometer." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21719/.

Full text

Abstract:

The atom, thanks to its wave behaviour, can manifest phenomena which are, usually, associated to light: interference is one of them. The possibility of cooling atomic clouds and manipulating the states of the atoms contained in them opened many new opportunities to exploit these states in many ways; one of them is measuring various kinds of physical observables with high precision, thanks to the aforementioned interference phenomena: this is atom interferometry. Since the first Bose-Einstein condensates in atomic gases were obtained, there has been a keen interest in interference between them, as it would mean to observe coherent quantum phenomena between macroscopic objects. Nevertheless, the high atomic density of condensates with respect to non condensed, thermal atomic clouds makes it difficult to ignore the effects of interactions within them. For the applications, understanding the role of interactions in the formation of interference figures is crucial. In this thesis, an algorithm for the enhancement of absorption images of a condensate has been developed. This algorithm computes an image basis for the noise and then remove the projection of the starting image from this basis, thus obtaining a clean image. This algorithm has then been applied to the enhancement of images obtained from atom interferometry. These images have then been analyzed using two techniques, and the obtained results have been compared to those for an ideal condensate. The results have been found not compatible with the ideal case, and are then due to atom-atom interactions.

APA, Harvard, Vancouver, ISO, and other styles

Ilo-Okeke, Ebubechukwu Odidika. "Guided-wave atom interferometers with Bose-Einstein condensate." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-dissertations/155.

Full text

Abstract:

An atom interferometer is a sensitive device that has potential for many useful applications. Atoms are sensitive to electromagnetic fields due to their electric and magnetic moments and their mass allows them to be deflected in a gravitational field, thereby making them attractive for measuring inertial forces. The narrow momentum distribution of Bose-Einstein condensate (BEC) is a great asset in realizing portable atom interferometers. An example is a guided-wave atom interferometer that uses a confining potential to guide the motion of the condensate. Despite the promise of guided-wave atom interferometry with BEC, spatial phase and phase diffusion limit the contrast of the interference fringes. The control of these phases is required for successful development of a BEC-based guided-wave atom interferometer. This thesis analyses the guided-wave atom interferometer, where an atomic BEC cloud at the center of a confining potential is split into two clouds that move along different arms of the interferometer. The clouds accumulate relative phase due to the environment, spatially inhomogeneous trapping potential and atom-atom interactions within the condensate. At the end of the interferometric cycle, the clouds are recombined producing a cloud at rest and moving clouds. The number of atoms in the clouds that emerge depends on the relative phase accumulated by the clouds during propagation. This is investigated by deriving an expression for the probability of finding any given number of atoms in the clouds that emerge after recombination. Characteristic features like mean, standard deviation and cross-correlation function of the probability density distribution are calculated and the contrast of the interference fringes is optimized. This thesis found that optimum contrast is achieved through the control of total population of atoms in the condensate, trap frequencies, s-wave scattering length, and the duration of the interferometric cycle.

APA, Harvard, Vancouver, ISO, and other styles

West, Tristan. "Quantum dot dynamics in a Bose-Einstein condensate." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/23993.

Full text

Abstract:

This thesis investigates the dynamics of an atomic quantum dot (AQD) coupled to a Bose-Einstein condensate (BEC) via particle exchange and interactions. This is motivated by the possibility of using such a system as a non-destructive probe of the BEC. A review of the physics of a BEC and relevant impurity models is presented. The collisional blockade regime of the AQD is considered, and the AQD is modelled as a spin-1/2 pseudospin. Having expressed the BEC in terms of number and phase, the semi-classical ground state of the system is determined. The fluctuations in number and phase around this ground state are assumed to be small. Using Fermi's golden rule, the decay rates of the system are calculated. The system dynamics are found to be highly dependent on dimensionality and the coupling between AQD and BEC. Having derived the action for this system, it is found that the small phase fluctuation assumption fails in two dimensions and for certain limits in three dimensions. We attempt to circumvent this difficulty using a canonical transformation. The resulting system is related to a biased spin-boson model. Expressing the pseudospin in terms of Schwinger bosons, the self energy for this system is determined. Green's functions for the system are derived by solving Dyson's equation, and a decay rate is extracted. Determining the spin-spin temporal correlation functions by solving the Bethe-Salpeter equation is found to be intractable due to the Schwinger boson number constraint. The possibility of avoiding this problem using the Holstein-Primakoff representation in a large-S generalisation of the AQD states is explored. We find that the pseudospin precession can be controlled by tuning the coupling parameters and the interactions in the BEC. In particular, we found two unexpected regimes where the pseudospin precession can be slowed down to arbitrarily small frequencies.

APA, Harvard, Vancouver, ISO, and other styles

Harutinian, Jorge Amin Seman. "Study of excitations in a Bose-Einstein condensate." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-24102011-140439/.

Full text

Abstract:

In this work we study a Bose-Einstein condensate of 87Rb under the effects of an oscillatory excitation. The condensate is produced through forced evaporative cooling by radio-frequency in a harmonic magnetic trap. The excitation is generated by an oscillatory quadrupole field superimposed on the trapping potential. For a fixed value of the frequency of the excitation we observe the production of different regimes in the condensate as a function of two parameters of the excitation: the time and the amplitude. For the lowest values of these parameters we observe a bending of the main axis of the condensate. This demonstrates that the excitation is able to transfer angular momentum into the sample. By increasing the time or the amplitude of the excitation we observe the nucleation of an increasing number of quantized vortices. If the value of the parameters of the excitation is increased even further the vortices evolve into a different regime which we have identified as quantum turbulence. In this regime, the vortices are tangled among each other, generating a highly irregular array. For the highest values of the excitation the condensate breaks into pieces surrounded by a thermal cloud. This constitutes a different regime which we have identified as granulation. We present numerical simulations together with other theoretical considerations which allow us to interpret our observations. In this thesis we also describe the construction of a second experimental setup whose objective is to study magnetic properties of a Bose-Einstein condensate of 87Rb. In this new system the condensate is produced in a hybrid trap which combines a magnetic trap with an optical dipole trap. Bose-Einstein condensation has been already achieved in the new apparatus; experiments will be performed in the near future.
Neste trabalho, estudamos um condensado de Bose-Einstein de átomos de 87Rb sob os efeitos de uma excitação oscilatória. O condensado é produzido por meio de resfriamento evaporativo por radiofreqüência em uma armadilha magnética harmônica. A excitação é gerada por um campo quadrupolar oscilatório sobreposto ao potencial de aprisionamento. Para um valor fixo da freqüência de excitação, observamos a produção de diferentes regimes no condensado como função de dois parâmetros da excitação, a saber, o tempo e a amplitude. Para os valores mais baixos destes parâmetros observamos a inclinação do eixo principal do condensado, isto demonstra que a excitação transfere momento angular à amostra. Ao aumentar o tempo ou a amplitude da excitação observamos a nucleação de um número crescente de vórtices quantizados. Se incrementarmos ainda mais o valor dos parâmetros da excitação, os vórtices evoluem para um novo regime que identificamos como turbulência quântica. Neste regime, os vórtices se encontram emaranhados entre si, dando origem a um arranjo altamente irregular. Para os valores mais altos da excitação o condensado se quebra em pedaços rodeados por uma nuvem térmica. Isto constitui um novo regime que identificamos como a granulação do condensado. Apresentamos simulações numéricas junto com outras considerações teóricas que nos permitem interpretar as nossas observações. Nesta tese, apresentamos ainda a descrição da montagem de um segundo sistema experimental cujo objetivo é o de estudar propriedades magnéticas de um condensado de Bose-Einstein de 87Rb. Neste novo sistema o condensado é produzido em uma armadilha híbrida composta por uma armadilha magnética junto com uma armadilha óptica de dipolo. A condensação de Bose-Einstein foi já observada neste novo sistema, os experimentos serão realizados no futuro próximo.

APA, Harvard, Vancouver, ISO, and other styles

Landini, Manuele. "A tunable Bose-Einstein condensate for quantum interferometry." Doctoral thesis, Università degli studi di Trento, 2012. https://hdl.handle.net/11572/368380.

Full text

Abstract:

The subject of this thesis is the use of BECs for atom interferometry. The standard way atom interferometry is today performed is by interrogating free falling samples of atoms. The employed samples are cold (but not condensed) to have high coherence, and dilute, not to interact significantly with each other. This technique represents nowadays an almost mature field of research in which the achievable interferometric sensitivity is bounded by the atomic shot noise. Until a few years ago the employment of BECs in such devices was strongly limited by the effect of the interactions between the condensed atoms. This obstacle is today removable exploiting interaction tuning techniques. The use of BECs would be advantageous for atom interferometry inasmuch they represents the matter analogue of the optical laser providing the maximum coherence allowed by quantum mechanics. Moreover, non-linear dynamic can be exploited in order to prepare entangled states of the system. The realization of entangled samples can lead to sub-shot noise sensitivity of the interferometers. At today very nice proof-of-principle experiments have been realized in this direction but a competitive device is still missing. This thesis work is inserted in a long term project whose goal is the realization of such a device. The basic operational idea of the project starts with the preparation of a BEC in a double well potential. By the effect of strong interactions the atomic system can be driven into an entangled state. Once the entangled state is prepared, interactions can be â€ switched offâ€ and the interferometric sequence performed. This thesis begins with the description of the apparatus for the production of tunable BECs to be used in the interferometer. We chose to work with 39K atoms because this atomic species presents many convenient Feshabch resonances at easily accessible magnetic field values. The cooling of this particular atomic species presents many difficulties, both for the laser and evaporative cooling processes. For this reason, this was the last alkaline atom to be condensed. Its condensation up to now was only possible by employing sympathetic cooling with another species. In this thesis our solutions to the various cooling issues is reported. In particular we realized sub-Doppler cooling for the first time for this species and we achieved condensation via evaporation in an optical dipole trap taking advantage of a Feshbach resonance. In the last part of this work, are presented original calculations for the effects of thermal fluctuations on the coherence of a BEC in a double well, discussing the interplay between thermal fluctuations and interactions in this system. Estimations and feasibility studies regarding the double well trap to be realized are also reported.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "Bose-Einstein condensate"

Aftalion, Amandine. Vortices in Bose—Einstein Condensates. Boston, MA: Birkhäuser Boston, 2006. http://dx.doi.org/10.1007/0-8176-4492-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Peter, Ketcham, and National Institute of Standards and Technology (U.S.), eds. Visualization of Bose-Einstein condensates. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1999.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Martellucci, Sergio, Arthur N. Chester, Alain Aspect, and Massimo Inguscio, eds. Bose-Einstein Condensates and Atom Lasers. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/b119239.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Peter, Ketcham, and National Institute of Standards and Technology (U.S.), eds. Volume visualization of Bose-Einstein condensates. [Gaithersburg, Md.]: U.S. Dept. of Commerce, [Technology Administration], National Institute of Standards and Technology, 2001.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Al, S. Martellucci et. Bose-Einstein Condensates and Atom Lasers. Dordrecht: Springer, 2000.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Matthews, Paige E. Bose-Einstein condensates: Theory, characteristics, and current research. Hauppauge, N.Y: Nova Science Publishers, 2009.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Kevrekidis, Panayotis G., Dimitri J. Frantzeskakis, and Ricardo Carretero-González, eds. Emergent Nonlinear Phenomena in Bose-Einstein Condensates. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-73591-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Book chapters on the topic "Bose-Einstein condensate"

Bhattacherjee, Aranya B. "Bose-Einstein Condensate." In New Frontiers in Nanochemistry, 45–48. Includes bibliographical references and indexes. | Contents: Volume 1. Structural nanochemistry – Volume 2. Topological nanochemistry – Volume 3. Sustainable nanochemistry.: Apple Academic Press, 2020. http://dx.doi.org/10.1201/9780429022937-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Easttom, Chuck. "Bose-Einstein Condensate." In Hardware for Quantum Computing, 49–61. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-66477-9_4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Basdevant, Jean-Louis, and Jean Dalibard. "Properties of a Bose–Einstein Condensate." In The Quantum Mechanics Solver, 223–33. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13724-3_22.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Basdevant, Jean-Louis, and Jean Dalibard. "Properties of a Bose—Einstein Condensate." In Advanced Texts in Physics, 195–204. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04277-9_24.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Linnemann, Daniel. "Hamiltonian of a Spin-1 Bose-Einstein Condensate." In Springer Theses, 31–49. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-96008-1_3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Sizhuk, Andrii S., Anatoly A. Svidzinsky, and Marlan O. Scully. "Fluctuations in Two Component Interacting Bose–Einstein Condensate." In Classical, Semi-classical and Quantum Noise, 235–48. New York, NY: Springer US, 2011. http://dx.doi.org/10.1007/978-1-4419-6624-7_16.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Santos, F. Pereira Dos, J. Léonard, Junmin Wang, C. J. Barrelet, F. Perales, E. Rasel, C. S. Unnikrishnan, M. Leduc, and C. Cohen-Tannoudji. "A Bose Einstein condensate of metastable helium atoms." In Coherence and Quantum Optics VIII, 193–200. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-8907-9_23.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Chapman, M. "All optical formation of a Bose Einstein condensate." In Coherence and Quantum Optics VIII, 107. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-8907-9_8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Mailoud Sekkouri, Samy, and Sandro Wimberger. "Mean-Field Transport of a Bose-Einstein Condensate." In Emergent Complexity from Nonlinearity, in Physics, Engineering and the Life Sciences, 49–58. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-47810-4_5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Kenkre, V. M. "Bose-Einstein Condensate Tunneling: The Gross-Pitaevskii Equation." In Interplay of Quantum Mechanics and Nonlinearity, 231–57. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-94811-5_10.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Bose-Einstein condensate"

Robb, G. R. M., J. G. M. Walker, G. L. Oppo, and T. Ackemann. "Acceleration of Optomechanical Droplets." In Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides, JTu1A.34. Washington, D.C.: Optica Publishing Group, 2024. http://dx.doi.org/10.1364/bgpp.2024.jtu1a.34.

Full text

Abstract:

We describe a scheme for acceleration sensing using stable optomechanical droplets formed when a Bose–Einstein Condensate is illuminated by a far off-resonant optical pump field and by its retroreflection from a feedback mirror.

APA, Harvard, Vancouver, ISO, and other styles

Chuu, Chih-Sung, Jay Hanssen, Todd Meyrath, Gabriel Price, Florian Schreck, and Mark Raizen. "Bose-Einstein Condensate in a Box." In Laser Science. Washington, D.C.: OSA, 2005. http://dx.doi.org/10.1364/ls.2005.ltub4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Meierovich, Boris E. "Bose-Einstein Condensate in Synchronous Coordinates." In Electronic Conference on Universe. Basel Switzerland: MDPI, 2023. http://dx.doi.org/10.3390/ecu2023-14121.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Henderson, Kevin C., Hrishikesh Kelkar, Braulio Gutierrez, Tongcang Li, and Mark G. Raizen. "Quantum Transport of a Bose Einstein Condensate." In Laser Science. Washington, D.C.: OSA, 2005. http://dx.doi.org/10.1364/ls.2005.ltub5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

ROUBTSOV, D., and Y. LÉPINE. "EXCITON-PHONON PACKETS WITH BOSE-EINSTEIN CONDENSATE." In Proceedings of the 11th International Conference. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812777843_0038.

Full text

APA, Harvard, Vancouver, ISO, and other styles

BRETIN, V., F. CHEVY, K. W. MADISON, P. ROSENBUCH, and J. DALIBARD. "QUANTIZED VORTICES IN A BOSE-EINSTEIN CONDENSATE." In Proceedings of the 7th International Symposium. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812776716_0025.

Full text

APA, Harvard, Vancouver, ISO, and other styles

INOUYE, S., J. R. ABO-SHAEER, A. P. CHIKKATUR, A. GÖRLITZ, S. GUPTA, T. L. GUSTAVSON, A. E. LEANHARDT, et al. "VORTEX EXCITATIONS IN A BOSE-EINSTEIN CONDENSATE." In Proceedings of the 7th International Symposium. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812776716_0026.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Chin, J. K., J. M. Vogels, T. Mukaiyama, K. Xu, J. R. Abo-Shaeer, D. E. Miller, and W. Ketterle. "Collapse of a homogeneous Bose-Einstein condensate." In Quantum Electronics and Laser Science (QELS). Postconference Digest. IEEE, 2003. http://dx.doi.org/10.1109/qels.2003.238226.

Full text

APA, Harvard, Vancouver, ISO, and other styles

van Ooijen, E. D., A. Ratnapala, C. J. Vale, M. J. Davis, N. R. Heckenberg, and H. Rubinsztein-Dunlop. "Shockwave Formation in a Bose-Einstein Condensate." In Quantum-Atom Optics Downunder. Washington, D.C.: OSA, 2007. http://dx.doi.org/10.1364/qao.2007.qwe25.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Grimm, Rudolf. "A tunable Bose-Einstein condensate of cesium atoms." In Frontiers in Optics. Washington, D.C.: OSA, 2003. http://dx.doi.org/10.1364/fio.2003.mff2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Bose-Einstein condensate"

Mestre Fons, Bartolomé, and Fabian Maucher. Finite temperature effects on Dipolar Superfluids. Fundación Avanza, May 2023. http://dx.doi.org/10.60096/fundacionavanza/1672022.

Full text

Abstract:

We qualitatively discuss the dependency of the phase-transition between a super- fluid and a supersolid of a dipolar Bose-Einstein condensate confined to a tubular geometry on temperature employing beyond mean-field corrections.

APA, Harvard, Vancouver, ISO, and other styles

Collins, Lee A., and Christopher Ticknor. Chaotic Behavior: Bose-Einstein Condensate in a Disordered Potential. Office of Scientific and Technical Information (OSTI), April 2014. http://dx.doi.org/10.2172/1129053.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conradson, Steven D., and Tomasz Durakiewicz. Emergent Properties of the Bose-Einstein-Hubbard Condensate in UO2(+x). Office of Scientific and Technical Information (OSTI), April 2013. http://dx.doi.org/10.2172/1073727.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Ketcham, Peter, David Feder, William Reinhardt, Charles Clark, and William George. Visualization of Bose-Einstein condensates. Gaithersburg, MD: National Institute of Standards and Technology, 1999. http://dx.doi.org/10.6028/nist.ir.6355.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Ketcham, Peter M., David L. Feder, Charles W. Clark, Steven G. Satterfield, Terence J. Griffin, William L. Georg, Barry L. Schneider, and William P. Reinhardt. Volume visualization of Bose-Einstein condensates. Gaithersburg, MD: National Institute of Standards and Technology, 2001. http://dx.doi.org/10.6028/nist.ir.6739.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Eugene B. Kolomeisky. Physics of Low-Dimensional Bose-Einstein Condensates. Office of Scientific and Technical Information (OSTI), December 2008. http://dx.doi.org/10.2172/943978.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Collins, Lee A., and Christopher Ticknor. Phase Transitions in Miscible Two-Component Bose-Einstein Condensates. Office of Scientific and Technical Information (OSTI), June 2015. http://dx.doi.org/10.2172/1188149.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Watson, Deborah K. A Study of Bose-Einstein Condensates Using Perturbation Theory. Fort Belvoir, VA: Defense Technical Information Center, November 2004. http://dx.doi.org/10.21236/ada427774.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!