Dynamics for two atoms interacting with intensity-dependent two-mode quantized cavity fields in the ladder configuration

Singh, Sudha; Ooi, C. H. Raymond; Amrita, .

doi:10.1103/physreva.86.023810

Cited by 20 publications

(13 citation statements)

References 24 publications

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“…We now investigate the existence of correlations between vibrational and cavity modes (mode-mode correlation), which may serve as a further quantum resource within the single-qubit system. Correlations between any couple of modes can be obtained by calculating the intermode second-order coherence [41,42,43,44], which in our system is given by…”

Section: Two-mode Correlationmentioning

confidence: 99%

Coherence and entanglement dynamics of vibrating qubits

Mortezapour

Naeimi

Franco

2018

Optics Communications

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We investigate the dynamics of coherence and entanglement of vibrating qubits. Firstly, we consider a single trapped ion qubit inside a perfect cavity and successively we use it to construct a bipartite system made of two of such subsystems, taken identical and noninteracting. As a general result, we find that qubit vibration can lead to prolonging initial coherence in both single-qubit and two-qubit system. However, despite of this coherence preservation, we show that the decay of the entanglement between the two qubits is sped up by the vibrational motion of the qubits. Furthermore, we highlight how the dynamics of photon-phonon correlations between cavity mode and vibrational mode, which may serve as a further useful resource stored in the single-qubit system, is strongly affected by the initial state of the qubit. These results provide new insights about the ability of systems made of moving qubits in maintaining quantum resources compared to systems of stationary qubits.

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Section: Two-mode Correlationmentioning

confidence: 99%

Coherence and entanglement dynamics of vibrating qubits

Mortezapour

Naeimi

Franco

2018

Optics Communications

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“…We end this subsection with an overview on the mean photon number distribution in an explicit manner [33,61]. By using the first relation in Eq.…”

Section: Quantum Statistics: Mandel Parameter and Mean Photon Number ...mentioning

confidence: 99%

Entanglement, quantum statistics and squeezing of twoΞ-type three-level atoms interacting nonlinearly with a single-mode field

Baghshahi

Tavassoly

2014

Phys. Scr.

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The interaction between two Ξ-type three-level atoms and a single-mode cavity field in the intensity dependent coupling regime has been studied. Exact analytical solution of the wave function for the considered atoms-field system has been obtained by using the Laplace transform technique when the atoms are initially prepared in the excited state and the field is in a coherent state. The presented structure has the potential ability to generate various new classes of entangled states depending on the chosen nonlinearity function. Two forms of intensity-dependent coupling as well as constant coupling are considered. Some important physical properties such as quantum entanglement, quantum statistics and quadrature squeezing of the corresponding states are investigated, numerically, by which the nonclassicality features of the produced entangled state are well-established. In particular, the effect of intensity-dependent coupling on the degree of entanglement between different bipartite partitions of the system (that is, "atom+atom"-field and "field+atom"-atom) using the linear entropy is investigated. At the same time, by paying attention to the negativity as a useful measure, the entanglement between the two atoms is studied in detail.

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“…In the left plots (f (n) = 1) of figures 4 and 5, Mandel parameter varies between positive and negative values, which means that the photons display super-or sub-Poissonian statistics for different intervals of times, alternatively. We end this subsection with an overview on the mean photon number distribution in an explicit manner [41,65]. By using Eq.…”

Section: Quantum Statisticsmentioning

confidence: 99%

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

Tavassoly

Behjat

2014

Commun. Theor. Phys.

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The interaction between a ♦-type four-level atom and a single-mode field in the presence of Kerr medium with intensity-dependent coupling involving multi-photon processes has been studied. Using the generalized (nonlinear) Jaynes-Cummings model, the exact analytical solution of the wave function for the considered system under particular condition, has been obtained when the atom is initially excited to the topmost level and the field is in a coherent state. Some physical properties of the atom-field entangled state such as linear entropy showing the entanglement degree, Mandel parameter, mean photon number and normal squeezing of the resultant state have been calculated. The effects of Kerr medium, detuning and the intensity-dependent coupling on the temporal behavior of the latter mentioned nonclassical properties have been investigated. It is shown that by appropriately choosing the evolved parameters in the interaction process, each of the above nonclassicality features, which are of special interest in quantum optics as well as quantum information processing, can be revealed.[10], entanglement [11], atomic dipole squeezing [12,13] and so on. This model has been extended in different directions such as multi-mode fields [14,15,16], multi-atoms interaction [17,18], multi-level atoms [19] and Kerr nonlinearity [20]. The interaction between two-level and different types of three-level atoms with quantized cavity field have been reviewed by Yoo and Eberly in [2]. Also, in recent years, researchers have strongly focused on the nonlinear interaction between a two-or multi-level atom with cavity field which leads to the deformed JCM. The latter nonlinear JCM, which firstly suggested in [21,22] describes the dependence of atom-field coupling on the light intensity. The revival-collapse phenomenon in the quadrature squeezing has been observed in the interaction between a two-level atom with single-mode cavity field of the multi-photon intensity-dependent JCM [23]. A nonlinear Jaynes-Cummings model which constructed from the standard JCM by deforming the single-mode field operators using f -deformed oscillator introduced by Man , ko et al [24] has been studied in [25]. The nonlinear interaction between a three-level atom in Λ-and V -configuration with a twomode field under a multi-photon process has been studied respectively in [26] and [27]. The interaction between a Λ-and V -type three-level atom with intensity-dependent coupling in a Kerr medium respectively studied in [28] and [29]. Recently, one of us has studied the entanglement dynamics of the nonlinear interaction between a Λ-type three-level atom with a two-mode cavity field in the presence of a cross-Kerr medium and its deformed counterpart [30], intensitydependent atom-field coupling and the detuning parameters [31,32]. Also, the authors have investigated a three-level atom in motion which interacts with a single-mode field in an optical cavity in an intensity-dependent coupling regime [33]. Sub-Poissonian statistics, population inversion and entropy squeezi...

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Dynamics for two atoms interacting with intensity-dependent two-mode quantized cavity fields in the ladder configuration

Cited by 20 publications

References 24 publications

Coherence and entanglement dynamics of vibrating qubits

Coherence and entanglement dynamics of vibrating qubits

Entanglement, quantum statistics and squeezing of twoΞ-type three-level atoms interacting nonlinearly with a single-mode field

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

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