Article
Physics, Multidisciplinary
Andrea Muni, Lea Lachaud, Angelo Couto, Michel Pokier, Raul Celistrino Teixeira, Jean-Michel Raimond, Michel Brune, Sebastien Gleyzes
Summary: This study demonstrates how to manipulate circular Rydberg states using the electrostatic coupling of strontium's valence electrons. It also shows the application of this coupling in non-destructive detection and the realization of a hybrid optical-microwave platform for quantum technology.
Article
Quantum Science & Technology
Ky-Luc Pham, Thomas F. Gallagher, Pierre Pillet, Steven Lepoutre, Patrick Cheinet
Summary: In this study, a new approach is proposed and demonstrated to apply a sizable light shift to a Rydberg state with close-to-resonant isolated core excitation (ICE) while avoiding autoionization. Ytterbium atoms in S-1(0) Rydberg states are investigated and spectroscopic studies of induced autoionization and light shift are well explained with multichannel quantum defect theory. This method provides a new tool for targeted coherent manipulation of Rydberg states in quantum simulation or quantum computing experiments with alkaline-earth atoms.
Article
Physics, Multidisciplinary
Andrea Muni, Lea Lachaud, Angelo Couto, Michel Poirier, Raul Celistrino Teixeira, Jean-Michel Raimond, Michel Brune, Sebastien Gleyzes
Summary: This study demonstrates the coherent manipulation of circular Rydberg states using the electrostatic coupling between the two valence electrons of strontium and optical pulses. The state of the Rydberg electron can be mapped onto the ionic core, enabling non-destructive detection of circular states and the realization of a hybrid optical-microwave platform for quantum technology.
Article
Chemistry, Physical
Konstantinos Orfanakis, Sai Kiran Rajendran, Valentin Walther, Thomas Volz, Thomas Pohl, Hamid Ohadi
Summary: In this study, the authors achieved strong coupling of light to Cu2O Rydberg excitons and demonstrated the formation of Cu2O Rydberg exciton-polaritons by embedding a thin Cu2O crystal into a Fabry-Perot microcavity. This paves the way towards realizing strongly interacting exciton-polaritons and exploring strongly correlated phases of matter using light on a chip.
Article
Quantum Science & Technology
Jiho Park, Heonoh Kim, Han Seb Moon
Summary: This experiment demonstrates the generation of a four-photon polarization-entangled GHZ state from Doppler-broadened atomic ensembles of Rb-87 atoms, achieving a high fidelity of 82.1% and stable performance, marking a significant step towards practical quantum networks and photonic quantum computation based on atom-photon interactions.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Article
Quantum Science & Technology
Hansol Jeong, Heewoo Kim, Han Seb Moon
Summary: A high-performance telecom-wavelength biphoton source from a hot 87Rb atomic vapor cell is reported, achieving a maximum biphoton cross-correlation of 44 under high optical depth and a spectral width of approximately 300 MHz, with an estimated coincidence count rate of 38,000 cps mW-1.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Physics, Multidisciplinary
L. R. Bakker, M. S. Bahovadinov, D. V. Kurlov, V. Gritsev, A. K. Fedorov, Dmitry O. Krimer
Summary: In a driven-dissipative system of two coupled bosonic modes in a nonlinear cavity resonator, a sequence of phase transitions from a trivial steady state to two distinct dissipative time crystalline phases is demonstrated. These effects are supported by both semiclassical analysis of the Lindblad equation and full quantum treatment. The system is predicted to exhibit different dynamical phases characterized by an oscillating non-equilibrium steady state with nontrivial periodicity, which is a hallmark of time crystals. It is expected that these phases can be directly probed in various cavity quantum electrodynamics experiments.
PHYSICAL REVIEW LETTERS
(2022)
Review
Chemistry, Multidisciplinary
Somnath Biswas, JunWoo Kim, Xinzi Zhang, Gregory D. Scholes
Summary: Coherent broadband spectroscopy and two-dimensional electronic spectroscopy have been widely used to investigate ultrafast processes and have made significant progress. These techniques provide important theoretical frameworks and experimental methods for optimizing the photophysical properties of various artificial systems.
Article
Engineering, Multidisciplinary
F. M. Aldosari, Ahmad Almutlg, A. -B. A. Mohamed
Summary: This paper investigates the ability of atom-photon interactions in two two-level atomic systems to generate quantum information resources. By studying local quantum uncertainty (LQU), local quantum Fisher information (LQFI), and logarithmic negativity (LN), the authors explore the generation of atomic quantum correlations through the coupling of two moving atoms with a coherent field via a two-photon transition. The results show that the interaction parameters significantly affect the dynamics of LQU, LQFI, and LN, and the initial coherent state intensity enhances this effect. The cavity field half-wave number leads to the generation of atomic quantum correlations with regular oscillatory behavior, and the phenomenon of sudden death-birth of logarithmic negativity depends on the atom-cavity-atom interaction and the atomic location parameter.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Physics, Applied
Yangyang Liu, Yuan Sun, Zhuo Fu, Peng Xu, Xin Wang, Xiaodong He, Jin Wang, Mingsheng Zhan
Summary: This study investigates the coherence of ground-Rydberg transitions in a single atom subjected to various pulse sequences, particularly focusing on the CZ gate sequence. It is found that the process experienced by the control qubit atom under a two-qubit entangling process with the H-CZ controlled-NOT gate scheme is essentially similar to ground-Rydberg Ramsey interference. A theoretical model linking the decoherence time of the control qubit to the CZ pulse sequence is established, shedding light on the origins of decoherence effects and potential ways to improve fidelity of the CZ gate.
PHYSICAL REVIEW APPLIED
(2021)
Article
Spectroscopy
Jakub Dostal
Summary: Coherent electronic two-dimensional spectroscopy is an established experimental technique for monitoring the time evolution of the studied sample after resonant optical excitation. It has been found that even nonresonant interactions can provide detectable spectral contributions. The adaptation of double-sided Feynman diagrams in this work provides a framework for studying various optical effects in the 2D spectrum.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Optics
Shi-Lei Su, Weibin Li
Summary: This study investigates the antiblockade dynamics of Rydberg atoms driven by dipole-dipole exchange interactions, demonstrating a method to realize geometric gates that are resistant to Rydberg state decay.
Article
Optics
Hui-min Zhao, Xiao-jun Zhang, M. Artoni, G. c. la Rocca, Jin-hui Wu
Summary: Strongly correlated photon pairs can be generated with high rates and brightnesses using enhanced nonlocal optical nonlinearities in cold atoms, leading to a dark state with a large population imbalance. This scheme works with resonant light fields, while minimizing linear absorption and Raman gain.
Article
Optics
Jiho Park, Heonoh Kim, Han Seb Moon
Summary: This study demonstrates a second-order interference experiment using thermal light from a warm atomic ensemble in two spatially separated unbalanced Michelson interferometers. The bright thermal light used for second-order interference is emitted via collective two-photon coherence in Doppler-broadened cascade-type Rb-87 atoms. The results suggest that the temporal waveforms of the interfering thermal light in the two spatially separated interferometers exhibit similarities with time-energy entangled photon pairs in Franson interferometry.
PHOTONICS RESEARCH
(2021)
Article
Multidisciplinary Sciences
M. Hays, V Fatemi, D. Bouman, J. Cerrillo, S. Diamond, K. Serniak, T. Connolly, P. Krogstrup, J. Nygard, A. Levy Yeyati, A. Geresdi, M. H. Devoret
Summary: Researchers combined the advantages of semiconductor spin qubits and superconducting electrodynamic qubits to create the Andreev spin qubit, achieving coherent spin manipulation and discovering spin-flip time and spin coherence time.
Article
Multidisciplinary Sciences
Jiteng Sheng, Cheng Yang, Haibin Wu
Summary: This study experimentally demonstrated a coupled-mode heat engine in a two-membrane-in-the-middle cavity optomechanical system, utilizing the normal mode of the cavity-mediated strongly coupled nanoresonators for an Otto cycle. The correlation of two membranes was shown to play a substantial role during the thermodynamic cycle. By manipulating normal modes, a straight-twin nanomechanical engine was successfully implemented.
Article
Optics
Gang Li, Yi Wu, Yan Lei Zhang, Bing He, Qing Lin
Summary: In this work, a mass sensing method based on the nonlinear optomechanical interaction is proposed, which can detect small mass changes by modifying the amplitude of the cavity field higher order sidebands. Even with a moderate mechanical quality factor, the added mass can still be detected and the sensing can be performed at room temperature.
Article
Optics
Zhixin Chen, Qing Lin, Bing He
Summary: In this study, we investigate the cooling process of a membrane-in-middle optomechanical system beyond the standard linearization approach. By simulating the detailed cooling processes, we examine the cooling speed and its relevance to the system parameters, providing essential knowledge for achieving optimal and/or fastest cooling.
Article
Optics
Saeid Vashahri-Ghamsari, Bing He
Summary: We examine the gain saturation effect in non-Hermitian systems of coupled gain-loss waveguides and whispering-gallery-mode microresonators, and generate continuous-variable entanglement of light fields through this system. The study shows that stable entanglement can be generated under gain saturation, and it exhibits squeezing characteristics.
Article
Multidisciplinary Sciences
Qiankun Zhang, Cheng Yang, Jiteng Sheng, Haibin Wu
Summary: In this study, we experimentally demonstrate a mechanism of generating phonon lasers from the dissipative coupling and reveal the differences between our method and conventional phonon lasers. The findings can be applied to various disciplines such as optics, acoustics, and quantum many-body physics.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Physics, Condensed Matter
K. Sharman, O. Golami, S. C. Wein, H. Zadeh-Haghighi, C. G. Rocha, A. Kubanek, C. Simon
Summary: Quantum emitters in two-dimensional hexagonal boron nitride have attracted attention due to their ultra-bright emission at room temperature. Recent observations have challenged the expectation of broad zero-phonon lines from solid-state emitters at elevated temperatures. Density functional theory calculations were used to determine the electron-phonon coupling for defects with in-and out-of-plane transition dipole moments, revealing that the dipole moments of different defects in hexagonal boron nitride exhibit different orientations with respect to the plane. The findings suggest that the presence of out-of-plane transition dipoles alone does not result in the low electron-phonon coupling necessary to achieve Fourier transform limited photons at room temperature.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Optics
Ze Feng Yan, Bing He, Qing Lin
Summary: We propose a detector for measuring weak periodic forces, which has a wide operation range and high sensitivity. By utilizing the nonlinear dynamical mechanism in optomechanical systems, the detector detects the modified cavity field sidebands caused by an unknown external periodic force. The locked mechanical oscillation amplitude linearly scales with the magnitude of the force to be measured, allowing for a wide range of force measurements.
Article
Multidisciplinary Sciences
Xinyi Ren, Jin Pan, Ming Yan, Jiteng Sheng, Cheng Yang, Qiankun Zhang, Hui Ma, Zhaoyang Wen, Kun Huang, Haibin Wu, Heping Zeng
Summary: The authors report an approach to ultrasensitive multiplexed gas sensing by integrating dual-comb spectroscopy with cavity optomechanics. This approach allows for high-resolution broadband overtone spectra measurements and offers possibilities for multi-species trace gas detection.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Fluids & Plasmas
Youssef Kora, Salma Salhi, Jorn Davidsen, Christoph Simon
Summary: We use a model of Wilson-Cowan oscillators to investigate the relationship between brain structure and function in the human brain. Through simulations of brain networks generated from connectome data, we establish connections between the global excitability of these networks and global structural network quantities. Comparisons between biological networks and shuffled networks reveal the brain's ability to achieve a balance between low wiring cost and strong functionality, and its capacity for a strong transition from an inactive state to a globally excited one.
Article
Multidisciplinary Sciences
Bing He, Qing Lin
Summary: This article presents a method for dealing with the quantum dynamics of optomechanical systems, which focuses on the dynamical evolution processes rather than the steady states. The method effectively captures the features of optomechanical cooling, entanglement, and other scenarios.
FUNDAMENTAL RESEARCH
(2023)
Review
Multidisciplinary Sciences
Jiteng Sheng, Cheng Yang, Haibin Wu
Summary: Classical thermodynamics deals with systems in equilibrium or near equilibrium, while nonequilibrium thermodynamics provides a general framework for understanding nonequilibrium processes, especially in small systems that are far-from-equilibrium and dominated by thermal or quantum fluctuations. Cavity optomechanical systems have great potential for studying nonequilibrium thermodynamics due to their high controllability, excellent mechanical performance, and ability to operate in the quantum regime. This article provides an overview of recent advancements in nonequilibrium thermodynamics with cavity optomechanical systems, focusing on experimental results in entropy production assessment, fluctuation theorems, heat transfer, and heat engines.
FUNDAMENTAL RESEARCH
(2023)
Article
Optics
Ze Feng Yan, Bing He, Qing Lin
Summary: We propose an alternative approach to force sensing using optomechanical systems, based on a nonlinear dynamical mechanism that locks the mechanical oscillation and the associated cavity field pattern. The force sensing is achieved by detecting the intensity changes of the cavity field sidebands during the transition between locked patterns. This method shows promise in practical applications of force sensing.
Article
Optics
Faezeh Kimiaee Asadi, Jia-Wei Ji, Christoph Simon
Summary: This study proposes a microwave-to-optical quantum transducer scheme based on rare-earth ions. By calculating and investigating, it shows that efficient conversion is possible at zero external magnetic fields.
Article
Materials Science, Multidisciplinary
Omid Golami, Kenneth Sharman, Roohollah Ghobadi, Stephen C. Wein, Hadi Zadeh-Haghighi, Claudia Gomes da Rocha, Dennis R. Salahub, Christoph Simon
Summary: In this theoretical study, the properties of the neutral C2CN carbon trimer defect in hexagonal boron nitride (h-BN) are predicted using group theory and density-functional theory (DFT) calculations. The study investigates multiple-electron states, radiative and nonradiative transitions, as well as magnetic-field and hyperfine interactions. The findings are applied to predict an optically detected magnetic resonance signal and the g2(??) correlation function. These results have important implications for quantum information applications.
Article
Optics
Yi Wu, Gang Li, Bing He, Qing Lin
Summary: The study reveals that mechanical oscillation in a doubly driven optomechanical system can be locked in either its amplitude or both amplitude and phase. Simultaneous amplitude and phase locking is possible under specific conditions for the difference of the drive frequencies, provided that the drive intensity is sufficiently high. These phenomena also exist in two coupled cavities containing one mechanical breathing mode.
