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Journal articles on the topic 'Rydberg atom'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 December 2024

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1

Deiß, Markus, Shinsuke Haze, and Johannes Hecker Denschlag. "Long-Range Atom–Ion Rydberg Molecule: A Novel Molecular Binding Mechanism." Atoms 9, no. 2 (June 21, 2021): 34. http://dx.doi.org/10.3390/atoms9020034.

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We present a novel binding mechanism where a neutral Rydberg atom and an atomic ion form a molecular bound state at a large internuclear distance. The binding mechanism is based on Stark shifts and level crossings that are induced in the Rydberg atom due to the electric field of the ion. At particular internuclear distances between the Rydberg atom and the ion, potential wells occur that can hold atom–ion molecular bound states. Apart from the binding mechanism, we describe important properties of the long-range atom–ion Rydberg molecule, such as its lifetime and decay paths, its vibrational and rotational structure, and its large dipole moment. Furthermore, we discuss methods of how to produce and detect it. The unusual properties of the long-range atom–ion Rydberg molecule give rise to interesting prospects for studies of wave packet dynamics in engineered potential energy landscapes.

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2

Joe, Yong S., Vanik E. Mkrtchian, and Sun H. Lee. "Artificial Rydberg atom." Physics Letters A 373, no. 10 (March 2009): 976–81. http://dx.doi.org/10.1016/j.physleta.2009.01.010.

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3

Pillet, P., R. Kachru, N. H. Tran, W. W. Smith, and T. F. Gallagher. "Radiative Rydberg-atom–Rydberg-atom collisions in the strong-field regime." Physical Review A 36, no. 3 (August 1, 1987): 1132–47. http://dx.doi.org/10.1103/physreva.36.1132.

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4

Jiao, Yuechun, Liping Hao, Jiabei Fan, Jingxu Bai, Jianming Zhao, and Suotang Jia. "Autoionization of Ultracold Cesium Rydberg Atom in 37D5/2 State." Photonics 9, no. 5 (May 17, 2022): 352. http://dx.doi.org/10.3390/photonics9050352.

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We present the observation of an autoionization of cesium 37D5/2 Rydberg atoms in ultracold gases and analyze the autoionization mechanism. The autoionization process is investigated by varying the delay time tD and Rydberg atomic density. The dependence of ionization signals on Rydberg density shows that the Rydberg density has an effect on not only the initial ion signals but also the evolution of the Rydberg atoms. The results reveal that the initial ionization of 37D5/2 Rydberg atoms is mostly attributed to the blackbody radiation (BBR)-induced photoionization, and the BBR-induced transitions to the nearby Rydberg states that lead to further ionization. Our work plays a significant role in investigating the collision between Rydberg atoms and many-body physics.

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5

Huang Wei, Liang Zhen-Tao, Du Yan-Xiong, Yan Hui, and Zhu Shi-Liang. "Rydberg-atom-based electrometry." Acta Physica Sinica 64, no. 16 (2015): 160702. http://dx.doi.org/10.7498/aps.64.160702.

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6

Agrawal, A. "Rydberg atom in gravity." Journal of Physics: Conference Series 484 (March 5, 2014): 012051. http://dx.doi.org/10.1088/1742-6596/484/1/012051.

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7

Adams, C. S., J. D. Pritchard, and J. P. Shaffer. "Rydberg atom quantum technologies." Journal of Physics B: Atomic, Molecular and Optical Physics 53, no. 1 (December 3, 2019): 012002. http://dx.doi.org/10.1088/1361-6455/ab52ef.

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8

Wang, Dehua, Shaohao Cheng, Qiang Chen, and Zhaohang Chen. "DC field microscopy of Rydberg Li atoms." Canadian Journal of Physics 94, no. 6 (June 2016): 548–57. http://dx.doi.org/10.1139/cjp-2015-0791.

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The DC field microscopy of Rydberg Li atoms has been studied on the basis of the semiclassical theory for the first time. In particular, we discuss the atomic core scattering effect in the ionization dynamics of the Rydberg Li atom. Unlike the case of the photoionization of a Rydberg H atom in an electric field, where the photoionization microscopy interference patterns are mainly caused by the Coulomb scattering and the electric field potential, for the photoionization of a Rydberg Li atom in an electric field, the influence of the atomic core scattering effect on the photoionization microscopy interference patterns plays an important role. In addition, the structure of the interference pattern, which contains the spatial component of the electronic wave function, evolves smoothly with the electron energy above the saddle point energy. The observed oscillatory patterns in the electron probability density distributions on the detector plane are interpreted within the framework of the semiclassical approximation, which can be considered as a manifestation of interference between various electron trajectories arriving at a given point from the atom to the detector plane. This study provides some reference values for future experimental research on photoionization microscopy of the non-hydrogen Rydberg atoms in the presence of external fields.

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9

Zhang, Lida, Valentin Walther, Klaus Mølmer, and Thomas Pohl. "Photon-photon interactions in Rydberg-atom arrays." Quantum 6 (March 30, 2022): 674. http://dx.doi.org/10.22331/q-2022-03-30-674.

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We investigate the interaction of weak light fields with two-dimensional lattices of atoms with high lying atomic Rydberg states. This system features different interactions that act on disparate length scales, from zero-range defect scattering of atomic excitations and finite-range dipole exchange processes to long-range Rydberg-state interactions, which span the entire array and can block multiple Rydberg excitations. Analyzing their interplay, we identify conditions that yield a nonlinear quantum mirror which coherently splits incident fields into correlated photon-pairs in a single transverse mode, while transmitting single photons unaffected. In particular, we find strong anti-bunching of the transmitted light with equal-time pair correlations that decrease exponentially with an increasing range of the Rydberg blockade. Such strong photon-photon interactions in the absence of photon losses open up promising avenues for the generation and manipulation of quantum light, and the exploration of many-body phenomena with interacting photons.

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10

Wang, De-Hua, Xin-Yue Sun, and Tong Shi. "Photoionization microscopy of the Rydberg Rb atom under a continuous infrared radiation laser field." Canadian Journal of Chemistry 98, no. 1 (January 2020): 24–33. http://dx.doi.org/10.1139/cjc-2019-0267.

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The photoionization microscopy of the Rydberg Rb atom exposed to a continuous infrared radiation laser field is investigated based on the semiclassical open orbit theory. In contrast to the photoionization of the Rydberg hydrogen atom, the ionic core-scattering effect plays an important role in the photoionization of the Rb atom. Due to the core-scattering effect and the laser field, the electron trajectories become chaotic. A huge number of ionization trajectories from the ionic source to the detector plane appear, which makes the oscillatory pattern in the electron probability distribution become much more complicated. The ρ–θ curve on the detector plane exhibits a self-similar fractal structure for the ionization trajectories of the Rydberg Rb atom in the laser field. Due to constructive and destructive quantum interference of different electron trajectories, a series of concentric rings appear in the photoionization microscopy interference patterns on the detector plane. The electron probability density distributions on the detector are found to be changed sensitively with the scaled electron energy and the laser wavelength. Even as the detector plane is located at a macroscopic distance from the photoionization source, the photoionization microscopy interference patterns can be observed clearly. These calculations may provide a valuable contribution to the actual experimental study of the photoionization microscopy of non-hydrogenic Rydberg atom in the laser field.

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11

Wang, L. Z. "Detection of Rydberg-atom micromasers." Physical Review A 45, no. 1 (January 1, 1992): R27—R30. http://dx.doi.org/10.1103/physreva.45.r27.

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12

Bai, Wen-Jie, Dong Yan, Hai-Yan Han, Shuo Hua, and Kai-Hui Gu. "Correlated dynamics of three-body Rydberg superatoms." Acta Physica Sinica 71, no. 1 (2022): 014202. http://dx.doi.org/10.7498/aps.71.20211284.

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Owing to the long lifetime of Rydberg atom, easy to operate and easy to control the interaction between Rydberg atoms, Rydberg atom has attracted considerable attention in quantum information and quantum optics fields. Specially, the anti-blockade effect, as a physical resource, can be used to implement various tasks in quantum information processing. Based on the rigid dipole blockade, an ensemble of two-level Rydberg atoms trapped in three magneto-optical traps can be regarded as a superatom. Based on the superatom model, the in-phase and anti-phase dynamics of the three-body Rydberg superatoms are studied by adjusting the numbers of atoms, and the W state and two kinds of maximal entangled states are generated simultaneously. Our work has great potential applications in coherent manipulation and quantum information processing.The numerical simulations are performed based on the superatom model and thereby the formidable obstacle that the Hilbert space dimension grows exponentially with the particle number increasing can be completely removed. As a result, the quantum control and quantum entanglement can be achieved from the single-quanta level to the mesoscopic level.

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13

Urbańczyk, Tomasz, Andrzej Kędziorski, Marek Krośnicki, and Jarosław Koperski. "Rydberg-State Double-Well Potentials of Van der Waals Molecules." Molecules 29, no. 19 (September 30, 2024): 4657. http://dx.doi.org/10.3390/molecules29194657.

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Recent progress in studies of Rydberg double-well electronic energy states of MeNg (Me = 12-group atom, Ng = noble gas atom) van der Waals (vdW) molecules is presented and analysed. The presentation covers approaches in experimental studies as well as ab initio-calculations of potential energy curves (PECs). The analysis is shown in a broader context of Rydberg states of hetero- and homo-diatomic molecules with PECs possessing complex ‘exotic’ structure. Laser induced fluorescence (LIF) excitation spectra and dispersed emission spectra employed in the spectroscopical characterization of Rydberg states are presented on the background of the diverse spectroscopic methods for their investigations such as laser vaporization–optical resonance (LV-OR), pump-and-probe methods, and polarization labelling spectroscopy. Important and current state-of-the-art applications of Rydberg states with irregular potentials in photoassociation (PA), vibrational and rotational cooling, molecular clocks, frequency standards, and molecular wave-packet interferometry are highlighted.

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14

Saakyan, Sergey, Nikita Morozov, Vladimir Sautenkov, and Boris B. Zelener. "Rydberg Interaction-Induced Distortion of the Autler–Townes Spectra in Cold Lithium Atoms." Atoms 11, no. 4 (April 13, 2023): 73. http://dx.doi.org/10.3390/atoms11040073.

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In this article, effects of the strong long-range interaction of Rydberg atoms on the Autler–Townes splitting spectrum are investigated. Preliminary results are obtained for various excitation times and Rydberg atom densities. The 2S1/2 and 2P1/2 levels of lithium-7 are coupled with strong laser field and probed by another laser via excitation into a 70S Rydberg level. Interactions between Rydberg atoms excited by the probe beam lead to the broadening of the Autler–Townes spectra. At high concentrations of Rydberg atoms, a suppression of the excitation of the Autler–Townes peak at red detuning is observed.

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15

Zhang, X., F. B. Dunning, S. Yoshida, and J. Burgdörfer. "Exploiting Rydberg blockade to probe strongly-coupled Rydberg atom pairs." Journal of Physics: Conference Series 635, no. 9 (September 7, 2015): 092022. http://dx.doi.org/10.1088/1742-6596/635/9/092022.

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16

Wang, Xin, Jun He, Jiandong Bai, and Junmin Wang. "Rydberg Level Shift due to the Electric Field Generated by Rydberg Atom Collision Induced Ionization in Cesium Atomic Ensemble." Applied Sciences 10, no. 16 (August 14, 2020): 5646. http://dx.doi.org/10.3390/app10165646.

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We experimentally studied the Rydberg level shift caused by the electric field, which is generated by Rydberg atom collision induced ionization in a cesium atomic ensemble. The density of charged particles caused by collisions between Rydberg atoms is changed by controlling the ground-state atomic density and optical excitation process. We measured the Rydberg level shift using Rydberg electromagnetically-induced-transparency (EIT) spectroscopy, and interpreted the physical origin using a semi-classical model. The experimental results are in good agreement with the numerical simulation. These energy shifts are important for the self-calibrated sensing of microwave field by the employing of Rydberg EIT. Moreover, in contrast to the resonant excitation case, narrow-linewidth spectroscopy with high signal-to-noise ratio would be useful for high-precision measurements.

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17

You, Shuhang, Minghao Cai, Haoan Zhang, Zishan Xu, and Hongping Liu. "Exclusive Effect in Rydberg Atom-Based Multi-Band Microwave Communication." Photonics 10, no. 3 (March 19, 2023): 328. http://dx.doi.org/10.3390/photonics10030328.

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We have demonstrated a Rydberg atom-based two-band communication with the optically excited Rydberg state coupled to another pair of Rydberg states by two microwave fields, respectively. The initial Rydberg state is excited by a three-color electromagnetically-induced absorption in rubidium vapor cell via cascading transitions, with all of them located in infrared bands: a 780 nm laser servers as a probe to monitor the optical transmittancy via transition 5S1/2→5P3/2, 776 nm and 1260 nm lasers are used to couple the states 5P3/2 and 5D5/2 and states 5D5/2 and 44F7/2. Experimentally, we show that two channel communications carried on the two microwave transitions influence each other irreconcilably, so that they cannot work at their most sensitive microwave-optical conversion points simultaneously. For a remarkable communication quality for both channels, the two microwave fields both have to make concessions to reach a common microwave-optical gain. The optimized balance for the two microwave intensities locates at EMW1=6.5 mV/cm and EMW2=5.5 mV/cm in our case. This mutual exclusive influence is theoretically well-explained by an optical Bloch equation considering all optical and microwave field interactions with atoms.

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18

Tretyakov, Denis B., Vasily M. Entin, Ilya I. Beterov, Elena A. Yakshina, Yury Ya Pechersky, Veniamin G. Gol’dort, and Igor I. Ryabtsev. "Two-Photon Laser Excitation of Rb Rydberg Atoms in the Magneto-Optical Trap and Vapor Cell." Photonics 10, no. 11 (October 27, 2023): 1201. http://dx.doi.org/10.3390/photonics10111201.

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We present our experimental results of two-photon laser excitation 5S1/2→5P3/2→nS1/2 of Rb atoms to Rydberg nS1/2 states with a homemade 480 nm laser in the second excitation step. In an experiment with cold Rb atoms, we excited the 42S1/2 state and detected Rydberg atoms with a selective-field-ionization (SFI) detector that provides single-atom resolution. The resonance line shapes well agreed with numerical simulations in a three-level theoretical model. We also studied the multiatom spectra of Rydberg excitation of mesoscopic atom ensembles which are of interest to quantum information processing. In the experiment with hot Rb atoms, we first excited the 30S1/2 state and observed a narrow Rydberg EIT resonance. Its line shape also agreed well with theory. Then, we performed a similar experiment with the higher 41S1/2 state and observed the Autler–Townes splitting of the EIT resonance in the presence of a microwave field, which was in resonance with the microwave transition 41S→41P3/2. This allowed us to measure the average strength of the microwave field and, thus, demonstrate the operation of a Rydberg microwave sensor. We may conclude that the developed homemade laser at 480 nm substantially extends our capabilities for further experiments on quantum information and quantum sensing with Rydberg atoms.

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19

Scheidegger, Simon, and Frédéric Merkt. "Spectroscopy of Highly Excited States of the Hydrogen Atom." CHIMIA International Journal for Chemistry 74, no. 4 (April 29, 2020): 285–88. http://dx.doi.org/10.2533/chimia.2020.285.

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In this contribution, we describe the status of the development of a precision-spectroscopic experiment aimed at measuring transitions to states of high principal quantum number n of the hydrogen atom (H). These states form series (called Rydberg series) which converge for n → ∞ to the ionization threshold of H. The ionization energy of H can thus be determined directly by measuring the frequencies of transitions to high-n states and extrapolating the Rydberg series to n → ∞.

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20

Hollerith, Simon, Johannes Zeiher, Jun Rui, Antonio Rubio-Abadal, Valentin Walther, Thomas Pohl, Dan M. Stamper-Kurn, Immanuel Bloch, and Christian Gross. "Quantum gas microscopy of Rydberg macrodimers." Science 364, no. 6441 (May 16, 2019): 664–67. http://dx.doi.org/10.1126/science.aaw4150.

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The subnanoscale size of typical diatomic molecules hinders direct optical access to their constituents. Rydberg macrodimers—bound states of two highly excited Rydberg atoms—feature interatomic distances easily exceeding optical wavelengths. We report the direct microscopic observation and detailed characterization of such molecules in a gas of ultracold rubidium atoms in an optical lattice. The bond length of about 0.7 micrometers, comparable to the size of small bacteria, matches the diagonal distance of the lattice. By exciting pairs in the initial two-dimensional atom array, we resolved more than 50 vibrational resonances. Using our spatially resolved detection, we observed the macrodimers by correlated atom loss and demonstrated control of the molecular alignment by the choice of the vibrational state. Our results allow for rigorous testing of Rydberg interaction potentials and highlight the potential of quantum gas microscopy for molecular physics.

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21

Hamedi, H. R., M. Sahrai, and H. Khoshsima. "Atom Localization Using a Rydberg State." Physics of Wave Phenomena 26, no. 1 (January 2018): 47–55. http://dx.doi.org/10.3103/s1541308x18010077.

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22

Brune, M., J. M. Raimond, P. Goy, L. Davidovich, and S. Haroche. "The two-photon Rydberg atom micromaser." IEEE Journal of Quantum Electronics 24, no. 7 (July 1988): 1323–30. http://dx.doi.org/10.1109/3.970.

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23

Casagrande, F., L. A. Lugiato, W. Lange, and H. Walther. "Multistability in mesoscopic Rydberg-atom systems." Physical Review A 48, no. 1 (July 1, 1993): 790–802. http://dx.doi.org/10.1103/physreva.48.790.

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24

Sevinçli, S., and T. Pohl. "Microwave control of Rydberg atom interactions." New Journal of Physics 16, no. 12 (December 15, 2014): 123036. http://dx.doi.org/10.1088/1367-2630/16/12/123036.

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25

Heidmann, A., J. M. Raimond, and S. Reynaud. "Squeezing in a Rydberg Atom Maser." Physical Review Letters 54, no. 4 (January 28, 1985): 326–28. http://dx.doi.org/10.1103/physrevlett.54.326.

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26

Ling, X., B. G. Lindsay, K. A. Smith, and F. B. Dunning. "Rydberg-atom collisions withSF6andCCl4at very highn." Physical Review A 45, no. 1 (January 1, 1992): 242–46. http://dx.doi.org/10.1103/physreva.45.242.

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27

Jones, M. P. A., L. G. Marcassa, and J. P. Shaffer. "Special Issue on Rydberg atom physics." Journal of Physics B: Atomic, Molecular and Optical Physics 50, no. 6 (February 21, 2017): 060202. http://dx.doi.org/10.1088/1361-6455/aa5d06.

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28

Deng, Jia, Andrew T. B. Gilbert, and Peter M. W. Gill. "Rydberg states of the helium atom." International Journal of Quantum Chemistry 109, no. 9 (2009): 1915–19. http://dx.doi.org/10.1002/qua.22015.

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29

Zheng, N. W., Z. Li, D. Ma, T. Zhou, and J. Fan. "Theoretical study of energy levels of atomic Ga." Canadian Journal of Physics 82, no. 7 (July 1, 2004): 523–29. http://dx.doi.org/10.1139/p04-028.

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There are few documented values of the energy levels of the gallium atom. The values in some series remain blank and some series have no values in high Rydberg states. In this paper, based on the weakest bound electron potential model theory we treat the many-valence electron system of the excited gallium atom as a single-electron system of the weakest bound electron and use Martin's expression to determine the parameters. Most of the results are satisfying with deviations less than 1 cm1 compared with the documented values in the National Institute of Standards and Technology. In addition, we fill many blanks in some high Rydberg energy levels of the gallium atom. PACS Nos.: 31.15.Ct, 32.10.Fn

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30

Holloway, Christopher L., Nikunjkumar Prajapati, Jeffery A. Sherman, Alain Rüfenacht, Alexandra B. Artusio-Glimpse, Matthew T. Simons, Amy K. Robinson, David S. La Mantia, and Eric B. Norrgard. "Electromagnetically induced transparency based Rydberg-atom sensor for traceable voltage measurements." AVS Quantum Science 4, no. 3 (September 2022): 034401. http://dx.doi.org/10.1116/5.0097746.

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We investigate the Stark shift in Rydberg rubidium atoms through electromagnetically induced transparency for the measurement of direct current (dc) and 60 Hz alternating current (ac) voltages. This technique has direct application to the calibration of voltage measurement instrumentation. We present experimental results for different atomic states that allow for dc and ac voltage measurements ranging from 0 to 12 V. While the state-of-the-art method for realizing the volt, the Josephson voltage standard, is significantly more accurate, the Rydberg atom-based method presented here has the potential to be a calibration standard with more favorable size, weight, power, and cost. We discuss the steps necessary to develop the Rydberg atom-based voltage measurement as a complementary method for dissemination of the voltage scale directly to the end user and discuss sources of uncertainties for these types of experiments.

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31

Cai, Minghao, Zishan Xu, Shuhang You, and Hongping Liu. "Sensitivity Improvement and Determination of Rydberg Atom-Based Microwave Sensor." Photonics 9, no. 4 (April 10, 2022): 250. http://dx.doi.org/10.3390/photonics9040250.

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We present a theoretical and experimental investigation of the improvement and determination of the sensitivity of Rydberg atom-based microwave RF sensor. An optical Bloch equation has been set up based on the configuration that two-color cascading lasers exciting atom to highly Rydberg state and a microwave RF coupling this Rydberg state to its adjacent neighbor. The numerical simulation shows that the sensitivity of the atomic RF sensor is correlated with the amplitude strengths of the applied two lasers and the RF itself. It also depends on the frequency detuning of the coupling laser, which induces an asymmetrically optical splitting. The coupling laser frequency fixing at the shoulder of the stronger one is more favorable for a higher sensitivity. Accordingly, we perform an experimental demonstration for the optimization of all these parameters and the sensitivity is improved to 12.50(04) nVcm−1·Hz−1/2.

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32

BASON, M. G., M. VITEAU, N. MALOSSI, D. CIAMPINI, O. MORSCH, and E. ARIMONDO. "RYDBERG EXCITATION OF A BOSE-EINSTEIN CONDENSATE." International Journal of Modern Physics: Conference Series 15 (January 2012): 1–8. http://dx.doi.org/10.1142/s2010194512006885.

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Rydberg excitation of an elongated Bose-Einstein condensate is performed. We show how the dipole-blockade mechanism restricts the number of Rydberg atoms it is possible to excite in such a cloud. Using the super-atom model we then look at the feasibility of observing coherent effects in even stricter geometries, one dimensional optical lattices

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33

Yang, Kai, Zhanshan Sun, Ruiqi Mao, Yi Lin, Yi Liu, Qiang An, and Yunqi Fu. "Wideband Rydberg atom-based receiver for amplitude modulation radio frequency communication." Chinese Optics Letters 20, no. 8 (2022): 081203. http://dx.doi.org/10.3788/col202220.081203.

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34

Wang, L. J., M. King, and T. J. Morgan. "Fast Rydberg hydrogen atom collisions with neutral atoms and molecules." Journal of Physics B: Atomic and Molecular Physics 19, no. 18 (September 28, 1986): L623—L628. http://dx.doi.org/10.1088/0022-3700/19/18/006.

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35

Brion, E., L. H. Pedersen, and K. Mølmer. "Implementing a neutral atom Rydberg gate without populating the Rydberg state." Journal of Physics B: Atomic, Molecular and Optical Physics 40, no. 9 (April 18, 2007): S159—S166. http://dx.doi.org/10.1088/0953-4075/40/9/s09.

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36

Cannon, M., C. Wang, and F. B. Dunning. "Production of heavy-Rydberg ion-pair states in Rydberg atom collisions." Journal of Physics: Conference Series 194, no. 10 (November 1, 2009): 102007. http://dx.doi.org/10.1088/1742-6596/194/10/102007.

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37

Tang, Shiqing, Chong Yang, Dongxiao Li, and Xiaoqiang Shao. "Implementation of Quantum Algorithms via Fast Three-Rydberg-Atom CCZ Gates." Entropy 24, no. 10 (September 27, 2022): 1371. http://dx.doi.org/10.3390/e24101371.

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Multiqubit CCZ gates form one of the building blocks of quantum algorithms and have been involved in achieving many theoretical and experimental triumphs. Designing a simple and efficient multiqubit gate for quantum algorithms is still by no means trivial as the number of qubits increases. Here, by virtue of the Rydberg blockade effect, we propose a scheme to rapidly implement a three-Rydberg-atom CCZ gate via a single Rydberg pulse, and successfully apply the gate to realize the three-qubit refined Deutsch–Jozsa algorithm and three-qubit Grover search. The logical states of the three-qubit gate are encoded to the same ground states to avoid an adverse effect of the atomic spontaneous emission. Furthermore, there is no requirement for individual addressing of atoms in our protocol.

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38

Prajapati, Nikunjkumar, Andrew P. Rotunno, Samuel Berweger, Matthew T. Simons, Alexandra B. Artusio-Glimpse, Stephen D. Voran, and Christopher L. Holloway. "TV and video game streaming with a quantum receiver: A study on a Rydberg atom-based receiver's bandwidth and reception clarity." AVS Quantum Science 4, no. 3 (September 2022): 035001. http://dx.doi.org/10.1116/5.0098057.

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We demonstrate the ability to receive live color analog television and video game signals with the use of the Rydberg atom receiver. The typical signal expected for traditional 480i National Television Standards Committee format video signals requires a bandwidth of over 3 MHz. We determine the beam sizes, powers, and detection method required for the Rydberg atoms to receive this type of signal. The beam size affects the average time the atoms remain in the interaction volume, which is inversely proportional to the bandwidth of the receiver. We find that small beam diameters (less than 100 μm) lead to much faster responses and allow for color reception. We demonstrate the effect of the beam size on bandwidth by receiving a live 480i video stream with the Rydberg atom receiver. The best video reception was achieved with a beam width of [Formula: see text]m full-width at half-max.

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39

Khrebtukov, Dimitri B., and Ilya I. Fabrikant. "Off-shell effect in Rydberg-atom–alkali-metal-atom scattering." Physical Review A 51, no. 6 (June 1, 1995): 4675–86. http://dx.doi.org/10.1103/physreva.51.4675.

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40

Song, Rong, Jingxu Bai, Yuechun Jiao, Jianming Zhao, and Suotang Jia. "Lifetime Measurement of Cesium Atoms Using a Cold Rydberg Gas." Applied Sciences 12, no. 5 (March 5, 2022): 2713. http://dx.doi.org/10.3390/app12052713.

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The lifetimes of nS1/2 and nD5/2 (n = 60–83) cesium Rydberg states are measured accurately in a magneto-optical trap using the field ionization technique and analyzed with the existing theoretical model. The room temperature blackbody radiation (BBR) and interaction between Rydberg atoms can enhance the decay rate and reduce the spontaneous lifetime of the given Rydberg atom. The measured lifetime shows a good agreement with the calculation accounting a room temperature BBR at low enough Rydberg atomic density. The dependence of measured lifetime on atomic density shows that the collision and interaction between Rydberg atoms have a large effect on the lifetime at higher Rydberg atomic density. The scaling laws of n2.55±0.02 for nD5/2 state and n2.30±0.01 for nS1/2 state within n = 60–83 range are obtained and agreement with the model calculation with a relative deviation less than 3%.

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41

Veilande, R., and I. Bersons. "Analysis of Revival Phenomenon for Strong-Field Excitation of Rydberg Atom." Latvian Journal of Physics and Technical Sciences 46, no. 4 (January 1, 2009): 61–65. http://dx.doi.org/10.2478/v10047-009-0015-0.

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Analysis of Revival Phenomenon for Strong-Field Excitation of Rydberg AtomThe autocorrelation function for a one-dimensional Rydberg atom irradiated by half-cycle pulse (HCP) is investigated. At weak field only the full revival is observed, at a medium field strength - a fractional revival, whereas at a strong field (when the continuous energy states are also populated) the revival phenomenon disappears. The contribution of the continuous energy states in the autocorrelation function decreases dramatically with time after the wave packet formation.

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42

Chicharro, David V., Sonia Marggi Poullain, Alexandre Zanchet, Aymen Bouallagui, Alberto García-Vela, María L. Senent, Luis Rubio-Lago, and Luis Bañares. "Site-specific hydrogen-atom elimination in photoexcited ethyl radical." Chemical Science 10, no. 26 (2019): 6494–502. http://dx.doi.org/10.1039/c9sc02140j.

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43

Kryukov, Nikolay, and Eugene Oks. "Circular Rydberg states of helium atoms or helium-like ions in a high-frequency laser field." Open Physics 19, no. 1 (January 1, 2021): 11–17. http://dx.doi.org/10.1515/phys-2021-0004.

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Abstract In the literature, there were studies of Rydberg states of hydrogenic atoms/ions in a high-frequency laser field. It was shown that the motion of the Rydberg electron is analogous to the motion of a satellite around an oblate planet (for a linearly polarized laser field) or around a (fictitious) prolate planet (for a circularly polarized laser field): it exhibits two kinds of precession – one of them is the precession within the orbital plane and another one is the precession of the orbital plane. In this study, we study a helium atom or a helium-like ion with one of the two electrons in a Rydberg state, the system being under a high-frequency laser field. For obtaining analytical results, we use the generalized method of the effective potentials. We find two primary effects of the high-frequency laser field on circular Rydberg states. The first effect is the precession of the orbital plane of the Rydberg electron. We calculate analytically the precession frequency and show that it differs from the case of a hydrogenic atom/ion. In the radiation spectrum, this precession would manifest as satellites separated from the spectral line at the Kepler frequency by multiples of the precession frequency. The second effect is a shift of the energy of the Rydberg electron, also calculated analytically. We find that the absolute value of the shift increases monotonically as the unperturbed binding energy of the Rydberg electron increases. We also find that the shift has a nonmonotonic dependence on the nuclear charge Z: as Z increases, the absolute value of the shift first increases, then reaches a maximum, and then decreases. The nonmonotonic dependence of the laser field-caused energy shift on the nuclear charge is a counterintuitive result.

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44

Zaichko, P. A. "RELATIVISTIC THEORY OF EXCITATION AND IONIZATION OF HEAVY ALKALI RYDBERG ATOMS IN A BLACK-BODY RADIATION FIELD: NEW DATA." Photoelectronics, no. 25 (December 26, 2016): 91–96. http://dx.doi.org/10.18524/0235-2435.2016.25.157630.

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The combined relativistic energy approach and relativistic many-body perturbation theory with the zeroth Dirac-Fock potential approximation are used for computing the thermal Blackbody radiation ionization characteristics of the alkali Rydberg atoms, in particular, the rubidium and caesium in Rydberg states with principal quantum number n = 20-100. Preliminary application of theory to computing ionization rate for the Rydberg sodium atom in the have demonstrated physically reasonable agreement between the theoretical and experimental data. The accuracy of the theoretical data is provided by a correctness of the corresponding relativistic wave functions and accounting for the exchange-correlation effects.

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45

Deck, F. J., E. A. Hessels, and S. R. Lundeen. "Population of high-Lsulfur Rydberg levels by ion–Rydberg-atom charge exchange." Physical Review A 48, no. 6 (December 1, 1993): 4400–4404. http://dx.doi.org/10.1103/physreva.48.4400.

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46

Fancher, C. T., K. L. Nicolich, K. M. Backes, N. Malvania, K. Cox, D. H. Meyer, P. D. Kunz, J. C. Hill, W. Holland, and B. L. Schmittberger Marlow. "A self-locking Rydberg atom electric field sensor." Applied Physics Letters 122, no. 9 (February 27, 2023): 094001. http://dx.doi.org/10.1063/5.0137127.

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A crucial step toward enabling real-world applications for quantum sensing devices such as Rydberg atom electric field sensors is reducing their size, weight, power, and cost (SWaP-C) requirements without significantly reducing performance. Laser frequency stabilization is a key part of many quantum sensing devices and, when used for exciting non-ground state atomic transitions, is currently limited to techniques that require either large SWaP-C optical cavities and electronics or use significant optical power solely for frequency stabilization. Here, we describe a laser frequency stabilization technique for exciting non-ground state atomic transitions that solves these challenges and requires only a small amount of additional electronics. We describe the operation, capabilities, and limitations of this frequency stabilization technique and quantitatively characterize its performance. We show experimentally that Rydberg electric field sensors using this technique are capable of data collection while sacrificing only 0.1% of available bandwidth for frequency stabilization of noise up to 900 Hz.

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Zhang, W. Y., Y. L. Liu, Y. Q. Ji, L. Dong, and X. M. Xiu. "Fusing atomic W states with Rydberg superatom." Laser Physics Letters 19, no. 5 (April 1, 2022): 055206. http://dx.doi.org/10.1088/1612-202x/ac6036.

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Abstract Quantum entanglement is the basic resource of quantum information processing and quantum computation, especially multi-partite entanglement. The simple and efficient generation of multi-partite entanglement has always been one of the hot topics of scholars. In this paper, we propose a qubit-loss-free fusion scheme for generation of large-scale entangled W states with Rydberg superatom. By sending two superatoms belonging to a k-atom W states and a l-atom W states, respectively, into a cavity, we may obtain a (k + l)-atom W states via detecting the cavity state after interaction. The numerical simulation analysis shows that the fidelity is robust against both spontaneous emission of superatoms and decay of the cavity. In addition, the feasibility analysis indicates this scheme can also be realized in experiment.

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KaiYu, LIAO, TU HaiTao, ZHANG XinDing, YAN Hui, and ZHU ShiLiang. "Rydberg atom based microwave sensing and communication." SCIENTIA SINICA Physica, Mechanica & Astronomica 51, no. 7 (March 23, 2021): 074202. http://dx.doi.org/10.1360/sspma-2020-0218.

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Teale, C., J. Sherman, and J. Kitching. "Degenerate two-photon Rydberg atom voltage reference." AVS Quantum Science 4, no. 2 (June 2022): 024403. http://dx.doi.org/10.1116/5.0090892.

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We implement a DC voltage reference by measuring Stark shifts of cesium Rydberg atoms in a vapor cell. Cesium atoms are excited from the ground state to the 15s state via a degenerate two-photon transition that provides a narrow, Doppler free line. The 15s state experiences a scalar, quadratic stark shift, which is used to measure the voltage across a parallel plate capacitor integrated into the vapor cell. We demonstrate a sensitivity of 82 mV/[Formula: see text] at a bias voltage of 100 V. The device could be adapted for even larger voltages by increasing the plate spacing or using a lower energy state.

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Ostrovsky, V. N., and N. V. Prudov. "Rydberg series of the planetary atom states." Journal of Physics B: Atomic, Molecular and Optical Physics 26, no. 11 (June 14, 1993): L263—L269. http://dx.doi.org/10.1088/0953-4075/26/11/001.

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