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Relevant bibliographies by topics / Tunneling splitting

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Academic literature on the topic 'Tunneling splitting'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 April 2022

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Journal articles on the topic "Tunneling splitting"

1

Ng, Selena, and Malcolm Perry. "Brane splitting via quantum tunneling." Nuclear Physics B 634, no. 1-2 (July 2002): 209–29. http://dx.doi.org/10.1016/s0550-3213(02)00346-2.

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Vybornyi, E. V. "Energy splitting in dynamical tunneling." Theoretical and Mathematical Physics 181, no. 2 (November 2014): 1418–27. http://dx.doi.org/10.1007/s11232-014-0222-6.

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3

Wang, Binglu, Yanhua Ma, Man Shen, and Hong Li. "Tunneling behavior of ultracold atoms in optical traps." Modern Physics Letters B 30, no. 20 (July 30, 2016): 1650245. http://dx.doi.org/10.1142/s0217984916502456.

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We investigate the tunneling of ultracold atoms in optical traps by using the path-integral method. We obtain the decay rate for tunneling out of a single-well and discuss how the rate is affected by the level splitting caused by the presence of a second adjacent well. Our calculations show that the transition through the potential barrier can be divided into three regions: the quantum tunneling region, the thermally assisted region and the thermal activation region. The tunneling process is found to be a second-order transition. We also show that level splitting due to tunneling can increase the tunneling rate.

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4

Bogey, M., H. Bolvin, M. Cordonnier, C. Demuynck, J. L. Destombes, R. Escribano, and P. C. Gomez. "Tunneling splittings in the rotational spectrum of." Canadian Journal of Physics 72, no. 11-12 (November 1, 1994): 967–70. http://dx.doi.org/10.1139/p94-127.

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The splitting of some rotational lines due to a predicted hydrogen atom migration in protonated acetylene, [Formula: see text], was not observed in the first pure rotational spectroscopy experiment in the vibrational ground state. An improvement of the spectral resolution of the spectrometer has allowed the observation of some of these small splittings. They have been interpreted within the semi-rigid bender model. Numerical results are presented for different values of the barrier height. Reasonable agreement between observed and calculated splittings is obtained with a barrier of about 1600 cm−1, which is 15% higher than the most recent ab initio value.

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Sekiya, Hiroshi, Taiji Nakajima, Hidenori Hamabe, Akira Mori, Hitoshi Takeshita, and Yukio Nishimura. "Proton Tunneling In 5-Chlorotropolone-M1 (M = Kr, Xe, CH4) Van Der Waals Complexes." Laser Chemistry 15, no. 2-4 (January 1, 1995): 229–47. http://dx.doi.org/10.1155/1995/28981.

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The S1-S0 fluorescence excitation spectra of 5-chlorotropolone-M1 (M = Kr, Xe, CH4) van der Waals (vdW) complexes in the region near the electronic origin have been measured in a supersonic free jet to investigate the effect of the vdW interactions on proton tunneling. Tunneling splittings have been observed in the vdW vibrations as well as in the 000 transitions of the Kr and Xe complexes. The 000 tunneling splitting of the 5-chlorotropolone-(CH4)1 complex is significantly smaller than those of the Kr and Xe complexes. It has been suggested that the vdW vibrations couple with intramolecular motions, leading to a higher potential energy barrier to tunneling in the CH4 complex. The results of the 5- chlorotropolone complexes have been compared to those of the tropolone complexes.

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6

Liu, Xue-Wen, and A. P. Stamp. "Resonance splitting effect in multibarrier tunneling." Physical Review B 47, no. 24 (June 15, 1993): 16605–7. http://dx.doi.org/10.1103/physrevb.47.16605.

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Yang, Rongcao, and Xiaoling Wu. "Spatial soliton tunneling, compression and splitting." Optics Express 16, no. 22 (October 17, 2008): 17759. http://dx.doi.org/10.1364/oe.16.017759.

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8

PECORA, LOUIS M., HOSHIK LEE, and DONG-HO WU. "REGULARIZATION OF TUNNELING RATES WITH QUANTUM CHAOS." International Journal of Bifurcation and Chaos 22, no. 10 (October 2012): 1250247. http://dx.doi.org/10.1142/s0218127412502471.

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We study tunneling in various shaped, closed, two-dimensional, flat-potential, double wells by calculating the energy splitting between symmetric and antisymmetric state pairs. For shapes that have regular or nearly regular classical behavior (e.g. rectangular or circular) the tunneling rates vary greatly over wide ranges often by several orders of magnitude. However, for well shapes that admit more classically chaotic behavior (e.g. the stadium, the Sinai billiard) the range of tunneling rates narrows, often by orders of magnitude. This dramatic narrowing appears to come from destabilization of periodic orbits in the regular wells that produce the largest and smallest tunneling rates and causes the splitting versus energy relation to take on a possibly universal shape. It is in this sense that we say the quantum chaos regularizes the tunneling rates.

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9

Klochikhin, V. L., and L. I. Trakhtenberg. "Tunneling splitting in vibrational spectra of molecules." Chemical Physics Letters 285, no. 1-2 (March 1998): 34–40. http://dx.doi.org/10.1016/s0009-2614(97)01469-3.

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10

Sewell, Thomas D., Yin Guo, and Donald L. Thompson. "Semiclassical calculations of tunneling splitting in malonaldehyde." Journal of Chemical Physics 103, no. 19 (November 15, 1995): 8557–65. http://dx.doi.org/10.1063/1.470166.

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Dissertations / Theses on the topic "Tunneling splitting"

1

Becker, Stefan [Verfasser]. "Design of a 300 mK-14 T scanning tunneling microscopy system and characterization of quantum Hall systems with respect to Rashba spin splitting, exchange enhancement and Coulomb gap / Vorname Stefan Becker." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2011. http://d-nb.info/1018201041/34.

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2

Medel, Robert. "Schwingungsspektroskopische Untersuchungen zur Chiralitätserkennung und Torsionsdynamik bei Alkoholen." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://hdl.handle.net/21.11130/00-1735-0000-0005-14BC-1.

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3

Reid, Adam. "Quantum tunnelling splittings in water clusters, from ring-polymer instanton theory." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709028.

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Richardson, Jeremy O. "Ring-polymer approaches to instanton theory." Thesis, University of Cambridge, 2012. https://www.repository.cam.ac.uk/handle/1810/243641.

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Inspired by the success of the ring-polymer molecular dynamics (RPMD) method, we derive a transition-state-theory version (RPTST) with a dividing surface which is, in general, conical in ring-polymer space. It is explained why this conical form is a good approximation to the optimal dividing surface and therefore why centroid-based quantum transition-state theories are inaccurate for asymmetric barriers at low temperatures. The geometry of the ring-polymer transition state is found to describe a finite-difference approximation to the semi-classical instanton trajectory (a classical periodic orbit of length βħ on the inverted potential). Based on this, a new practical method for locating multidimensional instantons is proposed, by computing saddle points on the ring-polymer surface, and a derivation for the reaction rate constant based on the "ImF" premise using the ring-polymer formalism is shown to be far simpler than in previous instanton approaches based on functional determinants. The resulting expression is based only on the ring-polymer potential at the transition-state and its Hessian, and is applied to evaluate the rate in a number of polyatomic systems. We show that a free-energy version of the ImF instanton theory is related to RPTST and thereby provide an explanation for why RPMD produces accurate results for thermal reaction rates in the deep-tunnelling regime and demonstrate how it can be made more efficient and systematically improved. From this, we also explain why RPMD is seen to underestimate the rates of symmetric reactions and overestimate the rates of asymmetric reactions. We also present a ring-polymer instanton derivation of a theory for calculating tunnelling splittings leading to another new practical method, which owing to its simple form, is easily extended to determine the entire tunnelling-splitting pattern of molecular clusters with two or more degenerate wells. This method is applied to the water dimer, trimer, and octamer, and shown to be in good overall agreement with experiment and to provide a deeper understanding of the tunnelling pathways.

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Zallo, Eugenio. "Control of electronic and optical properties of single and double quantum dots via electroelastic fields." Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-162870.

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Semiconductor quantum dots (QDs) are fascinating systems for potential applications in quantum information processing and communication, since they can emit single photons and polarisation entangled photons pairs on demand. The asymmetry and inhomogeneity of real QDs has driven the development of a universal and fine post-growth tuning technique. In parallel, new growth methods are desired to create QDs with high emission efficiency and to control combinations of closely-spaced QDs, so-called "QD molecules" (QDMs). These systems are crucial for the realisation of a scalable information processing device after a tuning of their interaction energies. In this work, GaAs/AlGaAs QDs with low surface densities, high optical quality and widely tuneable emission wavelength are demonstrated, by infilling nanoholes fabricated by droplet etching epitaxy with different GaAs amounts. A tuning over a spectral range exceeding 10 meV is obtained by inducing strain in the dot layer. These results allow a fine tuning of the QD emission to the rubidium absorption lines, increasing the yield of single photons that can be used as hybrid semiconductor-atomic-interface. By embedding InGaAs/GaAs QDs into diode-like nanomembranes integrated onto piezoelectric actuators, the first device allowing the QD emission properties to be engineered by large electroelastic fields is presented. The two external fields reshape the QD electronic properties and allow the universal recovery of the QD symmetry and the generation of entangled photons, featuring the highest degree of entanglement reported to date for QD-based photon sources. A method for controlling the lateral QDM formation over randomly distributed nanoholes, created by droplet etching epitaxy, is demonstrated by depositing a thin GaAs buffer over the nanoholes. The effect on the nanohole occupancy of the growth parameters, such as InAs amount, substrate temperature and arsenic overpressure, is investigated as well. The QD pairs show good optical quality and selective etching post-growth is used for a better characterisation of the system. For the first time, the active tuning of the hole tunnelling rates in vertically aligned InGaAs/GaAs QDM is demonstrated, by the simultaneous application of electric and strain fields, optimising the device concept developed for the single QDs. This result is relevant for the creation and control of entangled states in optically active QDs. The modification of the electronic properties of QDMs, obtained by the combination of the two external fields, may enable controlled quantum operations.

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6

Skone, Jonathan H. Hammes-Schiffer Sharon. "Quantum mechanical methods for calculating proton tunneling splittings and proton-coupled electron transfer vibronic couplings." 2008. http://www.etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-2481/index.html.

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7

Zallo, Eugenio. "Control of electronic and optical properties of single and double quantum dots via electroelastic fields." Doctoral thesis, 2014. https://monarch.qucosa.de/id/qucosa%3A20217.

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Semiconductor quantum dots (QDs) are fascinating systems for potential applications in quantum information processing and communication, since they can emit single photons and polarisation entangled photons pairs on demand. The asymmetry and inhomogeneity of real QDs has driven the development of a universal and fine post-growth tuning technique. In parallel, new growth methods are desired to create QDs with high emission efficiency and to control combinations of closely-spaced QDs, so-called "QD molecules" (QDMs). These systems are crucial for the realisation of a scalable information processing device after a tuning of their interaction energies. In this work, GaAs/AlGaAs QDs with low surface densities, high optical quality and widely tuneable emission wavelength are demonstrated, by infilling nanoholes fabricated by droplet etching epitaxy with different GaAs amounts. A tuning over a spectral range exceeding 10 meV is obtained by inducing strain in the dot layer. These results allow a fine tuning of the QD emission to the rubidium absorption lines, increasing the yield of single photons that can be used as hybrid semiconductor-atomic-interface. By embedding InGaAs/GaAs QDs into diode-like nanomembranes integrated onto piezoelectric actuators, the first device allowing the QD emission properties to be engineered by large electroelastic fields is presented. The two external fields reshape the QD electronic properties and allow the universal recovery of the QD symmetry and the generation of entangled photons, featuring the highest degree of entanglement reported to date for QD-based photon sources. A method for controlling the lateral QDM formation over randomly distributed nanoholes, created by droplet etching epitaxy, is demonstrated by depositing a thin GaAs buffer over the nanoholes. The effect on the nanohole occupancy of the growth parameters, such as InAs amount, substrate temperature and arsenic overpressure, is investigated as well. The QD pairs show good optical quality and selective etching post-growth is used for a better characterisation of the system. For the first time, the active tuning of the hole tunnelling rates in vertically aligned InGaAs/GaAs QDM is demonstrated, by the simultaneous application of electric and strain fields, optimising the device concept developed for the single QDs. This result is relevant for the creation and control of entangled states in optically active QDs. The modification of the electronic properties of QDMs, obtained by the combination of the two external fields, may enable controlled quantum operations.

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8

Müller, Christian. "Zeitaufgelöste Fluoreszenzspektroskopie unimolekularer Reaktionen im Überschalldüsenstrahl: trans-cis-Photoisomerisierung, Phenylringtorsion, intramolekularer Wasserstoffatomtransfer." Doctoral thesis, 2005. http://hdl.handle.net/11858/00-1735-0000-0006-B0C2-1.

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Book chapters on the topic "Tunneling splitting"

1

Bersuker, Isaac B., and Victor Z. Polinger. "Solution of Vibronic Equations. Tunneling Splitting." In Springer Series in Chemical Physics, 107–208. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-83479-0_4.

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2

Garcia-Fernandez, Pablo, A. Trueba, M. T. Barriuso, J. A. Aramburu, and Miguel Moreno. "Dynamic and Static Jahn-Teller Effect in Impurities: Determination of the Tunneling Splitting." In Vibronic Interactions and the Jahn-Teller Effect, 105–42. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2384-9_6.

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3

Tsuzuki, T. "On a Symmetric (2S+1)-State System Coupled to Its Environment: Tunneling Splitting and Quantum Coherence." In Springer Proceedings in Physics, 65–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-73107-5_14.

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4

Schröder, Markus, Daniel Peláez, and Hans-Dieter Meyer. "Numerical Studies of the Tunneling Splitting of Malonaldehyde and the Eigenstates of Hydrated Hydroxide Anion Using MCTDH." In High Performance Computing in Science and Engineering ‘13, 201–18. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-02165-2_15.

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5

Alvarez, G. A., F. Saba, T. Utagawa, and Y. Enomoto. "C-Axis Tunneling and Magnetic Field Splitting of the Quasiparticle States in Planar NdBa2Cu3O7-δ, Junctions with PrBa2Cu3O7-δ Barriers." In Advances in Superconductivity X, 1107–10. Tokyo: Springer Japan, 1998. http://dx.doi.org/10.1007/978-4-431-66879-4_262.

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6

Wales, D. J. "Rearrangements and Tunneling Splittings in Small Water Clusters." In Recent Theoretical and Experimental Advances in Hydrogen Bonded Clusters, 201–15. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-015-9434-9_14.

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7

Zaverkin, Viktor, and Johannes Kästner. "Chapter 7. Instanton Theory to Calculate Tunnelling Rates and Tunnelling Splittings." In Theoretical and Computational Chemistry Series, 245–60. Cambridge: Royal Society of Chemistry, 2020. http://dx.doi.org/10.1039/9781839160370-00245.

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8

Ferro-Costas, David, and Antonio Fernández-Ramos. "Chapter 9. The Calculation of Tunnelling Splittings Illustrated on Malonaldehyde." In Theoretical and Computational Chemistry Series, 283–327. Cambridge: Royal Society of Chemistry, 2020. http://dx.doi.org/10.1039/9781839160370-00283.

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9

"Multidimensional Theory of Tunneling Splitting." In Quantum Mechanical Tunneling in Chemical Physics, 75–107. CRC Press, 2013. http://dx.doi.org/10.1201/b14673-7.

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10

Dzyapko, Oleksandr, Hidekazu Kurebayashi, Vladislav E. Demidov, and Sergej O. Demokritov. "Control of Pure Spin Current by Magnon Tunneling and Three-Magnon Splitting in Insulating Yttrium Iron Garnet Films." In Recent Advances in Magnetic Insulators – From Spintronics to Microwave Applications, 83–122. Elsevier, 2013. http://dx.doi.org/10.1016/b978-0-12-408130-7.00004-6.

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Conference papers on the topic "Tunneling splitting"

1

Zhang, Huijing. "Energy-Level Splitting of Ligand-Stabilized Au55 Clusters Observed by Low-Temperature Scanning Tunneling Spectroscopy." In SCANNING TUNNELING MICROSCOPY/SPECTROSCOPY AND RELATED TECHNIQUES: 12th International Conference STM'03. AIP, 2003. http://dx.doi.org/10.1063/1.1639785.

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2

Jiang, Haitao, Liwei Zhang, Yaping Yang, Yewen Zhang, Hong Chen, and Shiyao Zhu. "Rabi splitting induced by photon tunneling modes in effective zero-index metamaterials." In SPIE OPTO: Integrated Optoelectronic Devices, edited by Selim M. Shahriar, Philip R. Hemmer, and John R. Lowell. SPIE, 2009. http://dx.doi.org/10.1117/12.808099.

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3

Huang, Chongqing, Junqiang Sun, Jing Liu, and Wenjing Hu. "Fine-tuning of the spectral efficiency based on tunneling splitting in multiple quantum well system." In Asia-Pacific Optical Communications. SPIE, 2007. http://dx.doi.org/10.1117/12.742010.

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4

Alexander, Ezra, Helen Leung, and Mark Marshall. "A DISCRETE VARIABLE APPROACH FOR INVESTIGATING TUNNELING SPLITTINGS AND VIBRATIONAL WAVE FUNCTIONS IN RARE GAS-ASYMMETRIC TOP HETERODIMERS." In 2020 International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2020. http://dx.doi.org/10.15278/isms.2020.mk09.

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Alexander, Ezra, Helen Leung, and Mark Marshall. "A DISCRETE VARIABLE APPROACH FOR INVESTIGATING TUNNELING SPLITTINGS AND VIBRATIONAL WAVE FUNCTIONS IN RARE GAS-ASYMMETRIC TOP HETERODIMERS." In 2021 International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2021. http://dx.doi.org/10.15278/isms.2021.wk07.

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