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Chinese Physics B 2014年第7期23卷 417-428页

作者： H R Baghshahi M K Tavassoly A Behjat Atomic and Molecular Group Faculty of PhysicsYazd University The Laboratory of Quantum Information Processing Yazd University Department of Physics Faculty of ScienceVali-e-Asr University of Rafsanjan Photonics Research Group Engineering Research CenterYazd University

The interaction between a two-level atom and a single-mode field in the k-photon jaynes-cummings model （JCM） in the presence of the Stark shift and a Kerr medium is studied. All terms in the Hamiltonian, such as the single-mode field, its interaction with the atom, the contribution of the Stark shift and the Kerr medium effects are considered to be f-deformed. In particular, the effect of the initial state of the radiation field on the dynamical evolution of some physical properties such as atomic inversion and entropy squeezing are investigated by considering different initial field states （coherent, squeezed and thermal states）.

关键词： jaynes-cummings model entropy squeezing atomic inversion intensity-dependent coupling

Quantum phase transition of the jaynes-cummings model

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Science China(Physics,Mechanics & Astronomy) 2024年第1期67卷 1-9页

作者： Cheng Liu Jin-Feng Huang Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Key Laboratory for Matter Microstructure and Function of Hunan ProvinceDepartment of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsInstitute of Interdisciplinary StudiesHunan Normal UniversityChangsha 410081China

Herein,we propose an experimentally feasible scheme to show the quantum phase transition of the jaynes-cummings(JC)model by modulating the transition frequency of a two-level system in a quantum Rabi model with strong *** tuning the modulation frequency and amplitude,the ratio of the effective coupling strength of the rotating terms to the effective cavity(atomic transition)frequency can enter the deep-strong coupling regime,while the counter-rotating terms can be ***,a deep-strong JC model is *** ratio of the coupling strength to resonance frequencies in the deep-strong JC model is two orders of magnitude larger than the corresponding ratio in the original quantum Rabi *** scheme can be employed in atom-cavity resonance and off-resonance cases,and it is valid over a broad *** nonzero average cavity photons of the ground state indicate the emergence of a quantum phase ***,we demonstrate the dependence of the phase diagram on the atom-cavity detuning and modulation *** the parameters used in our scheme are within the reach of current experimental *** scheme provides a new mechanism for investigating the critical phenomena of finite-sized systems without requiring classical field limits,thereby opening a door for studying fundamental quantum phenomena occurring in the ultrastrong and even deep-strong coupling regimes.

关键词： jaynes-cummings model quantum phase transition frequency modulation

First-order quantum phase transition and entanglement in the jaynes-cummings model with a squeezed light

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Chinese Physics B 2023年第7期32卷 262-267页

作者：汤椿琦沈利托 Fujian Key Laboratory of Quantum Information and Quantum Optics College of Physics and Information EngineeringFuzhou UniversityFuzhou 350116China

We study the quantum phase transition and entanglement in the jaynes-cummings model with squeezed light,utilize a special transformation method to obtain the analytical ground state of the model within the near-resonance regime,and numerically verify the validity of the analytical ground *** is found that the ground state exhibits a first-order quantum phase transition at the critical point linearly induced by squeezed light,and the ground state entanglement reaches its maximum when the qubit-field coupling strength is large enough at the critical point.

关键词： jaynes-cummings model quantum phase transition entanglement

Solving the jaynes-cummings model with Shift Operators Constructed by Means of the Matrix-Diagonalizing Technique

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Chinese Physics Letters 2018年第1期35卷 10-13页

作者： Jie Zhou Hong-Yi Su Fu-Lin Zhang Hong-Biao Zhang Jing-Ling Chen Theoretical Physics Division Chern Institute of MathematicsNankai UniversityTianjing 300071 Physics Department School of ScienceTianjin UniversityTianjin 300072 Institute of Theoretical Physics Northeast Normal UniversityChangchun 130024

The jaynes-cummings model is solved with the raising and lowering(shift)operators using the matrix-diagonalizing *** nonlocality is also found to be present ubiquitously in the excitation states of the model.

关键词： jaynes-cummings model

Dynamics of Information Entropies of Atom-Field Entangled States Generated via the jaynes-cummings model

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Communications in Theoretical Physics 2016年第3期65卷 266-272页

作者： R.Pakniat M.K.Tavassoly M.H.Zandi Faculty of Physics Shahid Bahonar University of Kerman Atomic and Molecular Group Faculty of PhysicsYazd University Photonic Research Group Engineering Research CenterYazd University The Laboratory of Quantum Information Processing Yazd University

In this paper we have studied the dynamical evolution of Shannon information entropies in position and momentum spaces for two classes of（nonstationary） atom-field entangled states,which are obtained via the jaynescummings model and its *** have focused on the interaction between two- and（1）-type three-level atoms with the single-mode quantized *** three-dimensional plots of entropy densities in position and momentum spaces are presented versus corresponding coordinates and time,*** is observed that for particular values of the parameters of the systems,the entropy squeezing in position space ***,we have shown that the well-known BBM（Beckner,Bialynicki-Birola and Mycielsky） inequality,which is a stronger statement of the Heisenberg uncertainty relation,is properly satisfied.

关键词： Shannon information entropy entropy squeezing BBM inequality jaynes-cummings model

Pseudo-invariant Eigen-operator for Deriving Energy-Level Gap for jaynes-cummings model

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Communications in Theoretical Physics 2006年第2期45卷 255-258页

作者： FAN Hong-Yi DA Cheng Department of Physics Shanghai Jiao Tong University Shanghai 200030 China Department of Material Science and Engineering University of Science and Technology of China Hefei 230026 China Depaxtment of Computer Science and Technology University of Science and Technology of China Hefei 230027 China

We extend the concept of invariant eigen-operator to pseudo-invariant eigen-operator case through analyzing the standard jaynes-cummings model. We find the pseudo-invariant eigen-operator in terms of supersymmetric ge... 详细信息

关键词： pseudo-invariant eigen-operator method jaynes-cummings model energy gap

Properties of field quantum entropy evolution in the jaynes-cummings model with initial squeezed coherent states field

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Chinese Physics B 2007年第12期16卷 3704-3709页

作者：刘王云安毓英杨志勇 School of Technical Physics Xidian University Xi'an 710071 China

The properties of the field quantum entropy evolution in a system of a single-mode squeezed coherent state field interacting with a two-level atom is studied by utilizing the complete quantum theory, and we focus our attention on the discussion of the influences of field squeezing parameter γ, atomic distribution angle θ and coupling strength g between the field and the atom on the properties of the evolution of field quantum entropy. The results obtained from numerical calculation indicate that the amplitude of oscillation of field quantum entropy evolution decreases with the increasing of squeezing parameter γ, and that both atomic distribution angle θ and coupling strength g between the field and the atom can influence the periodicity of field quantum entropy evolution.

关键词： quantum field entropy single-mode squeezed coherent states jaynes-cummings model

Optimal initial states for quantum parameter estimation based on jaynes–cummings model[Invited]

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Chinese Optics Letters 2023年第10期21卷 106-113页

作者：乔莉文彭家鑫朱百强张卫平张可烨 Quantum Institute for Light and Atoms State Key Laboratory of Precision SpectroscopyDepartment of PhysicsSchool of Physics and Electronic ScienceEast China Normal UniversityShanghai 200062China Shanghai Branch Hefei National LaboratoryShanghai 201315China School of Physics and Astronomy and Tsung-Dao Lee InstituteShanghai Jiao Tong UniversityShanghai 200240China Shanghai Research Center for Quantum Sciences Shanghai 201315China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Quantum parameter estimation is a crucial tool for inferring unknown parameters in physical models from experimental *** jaynes–cummings model is a widely used model in quantum optics that describes the interaction between an atom and a single-mode quantum optical *** this Letter,we systematically investigate the problem of estimating the atom-light coupling strength in this model and optimize the initial state in the full Hilbert *** compare the precision limits achievable for different optical field quantum states,including coherent states,amplitude-and phase-squeezed states,and provide experimental suggestions with an easily prepared substitute for the optimal *** results provide valuable insights into optimizing quantum parameter estimation in the jaynes–cummings model and can have practical implications for quantum metrology with hybrid quantum systems.

关键词： quantum Fisher information jaynes-cummings model parameter estimation theory

Entropy evolution of field with a time-varying frequency in the jaynes-cummings model

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Engineering Sciences 2012年第2期10卷 78-83页

作者： Qiu Changdong T（Department of Electronic Engineering Wuyi University Wuyishan Fujian 354300China

Following jaynes-cummings model,the evolution of the field entropy in the system of a two-level atom interacting with the single mode coherent field is investigated under rotating-wave *** typical case "the field frequency variance with time in the form of sine ω=ω0+usin(wt) has been *** influences of the amplitude and angle frequency of the field frequency variance on entropy evolution of the field are discussed by numerical *** results indicate that the field frequency variance influences violently the behavior of field entropy evolution;the larger the amplitude of the field frequency variance is,the stronger the influence of the field frequency variance on the time evolution of field entropy is.

关键词： two-level atom jaynes-cummings model frequency of field varying with time the evolution of the field entropy

New approach to solving master equations of density operator for the jaynes cummings model with cavity damping

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Chinese Physics B 2014年第9期23卷 65-70页

作者： Seyed Mahmoud Ashrafi Mohammad Reza Bazrafkan Physics Department Faculty of ScienceI.K.I.University

By introducing thermo-entangled state representation Ⅰη〉, which can map master equations of density operator in quantum statistics as state-vector evolution equations, and using ＂dissipative interaction picture＂ we solve the master equation of jaynes-cummings model with cavity damping. In addition we derive the Wigner function for density operator when the atom is initially in the up state Ⅰ↑〉 and the cavity mode is in coherent state.

关键词： jaynes-cummings model entangled state representation master equations