Quantum dynamic behaviour in a coupled cavities system

Peng, Jun; Wu, Yunwen; Li, Xiaojuan

doi:10.1088/1674-1056/21/6/060302

Cited by 11 publications

(2 citation statements)

References 21 publications

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“…Therefore, it is important to study the entanglement dynamics for atoms in the coupled cavities. [26][27][28][29][30][31] However, the cavities in the previous works do not contain a Kerr medium. In this paper, we consider a system composed of two two-level atoms resonantly interacting with two coupled cavities filled with a Kerr medium, and study the influences of the initial atomic state, the Kerr medium, and the cavity-cavity hopping rate on the entanglement dynamics of the two atoms.…”

Section: Introductionmentioning

confidence: 99%

Entanglement of two two-level atoms trapped in coupled cavities with a Kerr medium

Wu¹,

Zhang²

2014

Chinese Phys. B

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In this paper, the entanglement dynamics of two two-level atoms trapped in coupled cavities with a Kerr medium is investigated. We find that the phenomena of entanglement sudden death (ESD) and entanglement sudden birth (ESB) appear during the evolution process. The influences of initial atomic states, Kerr medium, and cavity-cavity hopping rate on the atom-atom entanglement are discussed. The results obtained by the numerical method show that the atomatom entanglement is strengthened and even prevented from ESD with increasing cavity-cavity hopping rate and Kerr nonlinearity.

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Section: Introductionmentioning

confidence: 99%

Entanglement of two two-level atoms trapped in coupled cavities with a Kerr medium

Wu¹,

Zhang²

2014

Chinese Phys. B

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“…Cavity quantum electrodynamics is mainly studied the dynamic process of interaction between electromagnetic field and matter (such as atoms, ions and quantum dots) in confined space [1] and provides a natural environment for the study of various quantum phenomena [2]. In cavity quantum electrodynamics, the atomic system in the cavity can be used as the storage qubit, while the photon can distribute information throughout the system [2].…”

Section: Introductionmentioning

confidence: 99%

Emission spectrum in dissipative cavities coupled with quantum dots

Zhang¹,

Lü²

2019

J. Phys. B: At. Mol. Opt. Phys.

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In this paper, the properties of emission spectra of dissipative cavities coupled with quantum dots were studied. The effects of the cavity incoherent pump rate on the emission spectra of the system are discussed. We found that the incoherent pump rate can enhance the fluorescence emission in dissipative cavities coupled with quantum dots and the result can be confirmed in experiment. In addition, the effects of the coupling strengths between quantum dot and cavity field, and between the two cavities on the emission spectra of the system also are discussed. Our results show that in the case of no matter resonance or off-resonance, the triple peaks should occur in theory when the single-mode cavity coupled with a double-level system is affected by external coherent fields and we also demonstrate that the Rabi splitting increases with the coupling strengths between quantum dot and cavity field or between the two cavities increase.

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Single‐Atom Entanglement for a System of Directly Linked Two Cavities in the Presence of an External Classical Field: Effect of Atomic Coherence

Hanoura

Ahmed

Khalil

et al. 2019

Fortschritte der Physik

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The Hamiltonian of a system composed of two standard Jaynes‐Cummings cells connected by the overlap of evanescent cavity fields, which allows photons to hop from the first cavity to the second and vice versa, and interacting with an external classical field, is simplified in the framework of unitary canonical transformations. James's method of the effective Hamiltonian is used in the derivation of two effective Hamiltonians with two completely dispersive regimes. Analytical expressions for the time dependent wavefunction and the elements of the reduced atomic operators for the different Hamiltonians are derived. The temporal evolution of atomic quantum entropy is calculated when the fields are initially in their vacuum states with various forms of the atomic initial states. Effects of the photon hopping strength, detuning and the various forms of the atomic initial states on the evolution of the von Neumann entropies are analyzed. The impact of the time‐average technique on the features resulting due to involving the controlling parameters and their influences on the considered functions is discussed. Damping is taken into account through a non‐Hermitian Hamiltonian and results are discussed. General conclusions reached are illustrated by numerical results.

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Quantum dynamic behaviour in a coupled cavities system

Cited by 11 publications

References 21 publications

Entanglement of two two-level atoms trapped in coupled cavities with a Kerr medium

Entanglement of two two-level atoms trapped in coupled cavities with a Kerr medium

Emission spectrum in dissipative cavities coupled with quantum dots

Single‐Atom Entanglement for a System of Directly Linked Two Cavities in the Presence of an External Classical Field: Effect of Atomic Coherence

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