Dynamics of Entropy and Nonclassicality Features of the Interaction between a ⋄-type Four-Level Atom and a Single-Mode Field in the Presence of Intensity-Dependent Coupling and Kerr Nonlinearity

Baghshahi, Hamid Reza; Tavassoly, M. K.; Behjat, Abbas

doi:10.1088/0253-6102/62/3/22

Cited by 33 publications

(16 citation statements)

References 80 publications

(119 reference statements)

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“…In addition, this model is expandable to multi-level multi-atom (Tavis-Cummings model [8]) interacting with multi-mode field. Tavis-Cummings model has been frequently considered in the literature [9][10][11][12][13][14][15] due to importance of multi-level systems. The entangled states can be transferred over long distances by the quantum repeater protocol which at first has been proposed in [16].…”

Section: Introductionmentioning

confidence: 99%

Quantum repeater using three-level atomic states in the presence of dissipation: stability of entanglement

Ghasemi

Tavassoly

2019

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

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In this paper we want to investigate the possibility of transferring entanglement to two three-level separable atomic states over large distance using the quantum repeater protocol. In detail, our model consists of eight Λ-type three-level atoms where only the pairs (1,2), (3,4), (5,6) and (7,8) are prepared in maximally entangled states. Performing suitable interaction between non-entangled three-level atoms (2,3) and (6,7) in two-mode cavities with photon leakage rates κ, κ ′ in the presence of spontaneous emission leads to producing entanglement between atoms (1,4) and (5,8), separately. Finally, the entanglement between atoms (1,8) is successfully produced by performing interaction between atoms (4,5) while spontaneous emission is considered in a dissipative cavity. In the continuation, the effects of detuning, dissipation and initial interaction time are considered on negativity and success probability of the processes. The maxima of negativity are decreased by increasing the detuning, in most cases. Also, the time evolution of negativity is non-periodic in the presence of dissipation. Increasing the initial interaction time has a constructive effect on negativity in all considered cases. The oscillations of negativity are destroyed as time goes on and the produced entanglement is stabled. The success probability of entangled state of atoms (1,8) is tunable by controlling the detuning and dissipation. We show that via justifying the involved parameters one can arrive at conditions in which the decoherence effects are fully disappeared; as a result an ideal quantum repeater can be achieved while atomic and field dissipations are taken into account.

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Section: Introductionmentioning

confidence: 99%

Quantum repeater using three-level atomic states in the presence of dissipation: stability of entanglement

Ghasemi

Tavassoly

2019

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

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“…The JCM and its generalizations have been reported in the literature [12][13][14]; the atom-field interaction naturally leads to the entangled state. Throughout the recent five decades, the JCM has been generalized using the Kerr nonlinearity [15,16], intensity-dependent coupling [17][18][19][20], multi-photon transitions [21][22][23], and the atomic motion with the classical homogenous gravitational field [24].…”

Section: Introductionmentioning

confidence: 99%

Statistical Aspects and Dynamical Entanglement for a Two-Level Atom Moving on Along Cavity Length of x-Direction: Atomic Position Distribution

2019

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In this work, the problem of the quantum optical model is considered where an one-mode quantized radiation field interacts with a two-level atom (TLA). Also, the atomic position distribution is taken into account, i.e., the atom passing through the length of the optical cavity. We believe that the atomic position affects the matter-field interaction and can be realized in several multiple experiments, such as ultracold atoms and trapped ions. We take into consideration the atom is moving along the cavity field in the x-direction so that the time-position Schrödinger equation for the atom in the x-direction is obtained. We suppose that the field is initially prepared in a coherent state optical field and the atom is initially prepared in an excited state. Also, the atomic motion along the cavity length vanishes in the cavity wall. By using the Laplace transformation method, an exact analytical solution for the coupled partial differential Schrödinger equation for the wave function is calculated. Some non-classical statistical aspects such as the atomic inversion and the photon distributions are discussed in detail. The collapses-revivals, the Poissonian distributions of the photon by Mandel Q parameter, the degrees of the entanglement, and the fidelity have been investigated. The effect of the atomic position distribution in the x-direction on these phenomena is examined. We observed that the atomic position distribution along the cavity has an effective effect on the quantum statistical properties of these phenomena. Minutely, the influence of the atom location distribution on the amount of quantum entanglement has been obtained.

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“…In this regard, several interesting generalizations have been proposed based on JCM. For instance, we can point to three‐ or multi‐level atoms instead of two‐level atom, multi‐mode fields instead of a single‐mode field , intensity‐dependent or time‐dependent atom‐field coupling and so on. Particularly, as another generalization of JCM, Solano et al.…”

Section: Introductionmentioning

confidence: 99%

The generation and properties of new classes of multipartite entangled coherent squeezed states in a conducting cavity

Daneshmand

Tavassoly

2017

Annalen der Physik

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Recently the quantum description of electromagnetic waves in conducting media has been performed. It has been deduced that, in particular situations the Hamiltonian of corresponding field can be expressed by the well-known Caldirola-Kanai Hamiltonian. In this paper, using the associated annihilation and creation operators of the abovementioned real physical system, a few schemes for the generation of some classes of time-dependent multipartite entangled coherent squeezed states are proposed. To achieve the purpose, the interaction of a narrow bunch of two-level atoms with such a quantized field in a conducting cavity and in the presence of a strong-driving classical field is taken into account. The influence of the conductivity parameter on the degree of entanglement and atomic population inversion is studied, numerically. As will be clarified, the related physical quantities can be controlled by the conductivity parameter. In detail, it is shown that the entanglement reaches to its maximum value with smaller delay in the presence of larger values of conductivity. Also, it is observed that by increasing the conductivity, the time for occurring collapse-revival in the atomic inversion is decreased.

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Dynamics of Entropy and Nonclassicality Features of the Interaction between a ⋄-type Four-Level Atom and a Single-Mode Field in the Presence of Intensity-Dependent Coupling and Kerr Nonlinearity

Cited by 33 publications

References 80 publications

Quantum repeater using three-level atomic states in the presence of dissipation: stability of entanglement

Quantum repeater using three-level atomic states in the presence of dissipation: stability of entanglement

Statistical Aspects and Dynamical Entanglement for a Two-Level Atom Moving on Along Cavity Length of x-Direction: Atomic Position Distribution

The generation and properties of new classes of multipartite entangled coherent squeezed states in a conducting cavity

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