Quantum entanglement and position–momentum entropic squeezing of a moving Lambda-type three-level atom interacting with a single-mode quantized field with intensity-dependent coupling

Faghihi, Mohammad Javad; Tavassoly, M. K.

doi:10.1088/0953-4075/46/14/145506

Cited by 40 publications

(26 citation statements)

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“…Also, in order to survey the JCM in different concepts, interesting results have been attained according to various generalizations of this model. We may refer to a few examples of them as follows: the interaction between two two-level atoms and a single-mode field [3], the interaction between N-level atom and (N À 1)-mode field [4], the interactions of a multi-level atom and one-or two-mode field [5,6], multi-photon transitions in the atom-field interaction [7][8][9][10], intensity-dependent JCM (nonlinear regime) [11][12][13] which in particular we will also deal with in the present paper, different interaction schemes between atoms and electromagnetic field in the presence of a Kerr medium [14][15][16], JCM with electromagnetic field in the presence of converter terms [17,18], JCM in the presence of Stark shift [7,19,20] and finally JCM when the atom-field coupling is position-dependent [21,22].…”

Section: Introductionmentioning

confidence: 99%

“…Then, by using (21) the following relations may be obtained: Accordingly, the wave function of the entire atom-field system t t , (17) is completely determined in an explicit form. We should again emphasize that due to relation (22), the final state vector of the considered system holds under the assumption of existence of different solutions for the third-order polynomial (Eq. (19)), which is applicable for a wide range of physically reasonable parameters.…”

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confidence: 99%

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Dynamics of physical properties of a single-mode quantized field non-linearly and non-resonantly interacting with two V-type three-level atoms passing consecutively through a cavity

Faraji

Tavassoly

2015

Optics Communications

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Dynamics of physical properties of a single-mode quantized field non-linearly and non-resonantly interacting with two V-type three-level atoms passing consecutively through a cavity

Faraji

Tavassoly

2015

Optics Communications

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“…In accordance with the concept of von Neumann entropy [16], it has been put forward that for a bicomponent system in a quantum state, the degree of the entanglement between the two components can be described accurately through the utilization of the reduced quantum entropy by Bennett, Phoenix and Knight et al [17][18][19][20][21], as the degree of the entanglement is proportional to their reduced quantum entropy. In order to build a quantificationally comparable relationship among different entangled states, we quantify the DEM adopting the definition of partial entropy in our system.…”

Section: Introductionmentioning

confidence: 99%

The influence of spontaneously generated coherence on atom-photon entanglement in a Λ-type system with an incoherent pump

et al. 2014

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Abstract:Owing to interference induced by spontaneous emission, the density-matrix equations in a three-level Λ-type system have an additional coherence term, which plays a critical role in modulating the inversionless gain and electromagnetically induced transparency effect. In addition, it is shown that spontaneously generated coherence (SGC) has an effect on the entanglement between an atom and a photon of the coupling laser field by calculating the degree of entanglement (DEM) of the atomic system. In this paper, we investigate the influence of the SGC effect on atom-photon entanglement in a Λ-type system, which generally remains a high entangled state. When an incoherent pump source is introduced, we find that the SGC effect could exert considerable influence on the atom reduced entropy under certain conditions for both transient and steady states. More interestingly, such an incoherent pump field could actively affect the short-time dynamic behaviors of the transient quantum entangled state at a certain range of pump rate as a typical coherent case. PACS

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“…For instance, temporal behavior of the VNE of the nonlinear interaction between a three-level atom and a two-mode cavity field in the presence of a cross-Kerr medium and its deformed counterpart [38] and detuning parameters has been investigated in [39,40]. In another case, the amount of the degree of entanglement (DEM) between a three-level atom in motion interacting with a single-mode field in the intensity-dependent coupling regime was calculated [41]. The effects of the mean photon number, the detuning parameter, the Kerr-like medium, and various atom-field couplings on the DEM of the interaction between a three level-atom and a two-mode field were studied in [42].…”

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confidence: 99%

Quantum Fisher Information and Entanglement of Moving Two Two-Level Atoms under the Influence of Environmental Effects

Anwar

Usman

Ramzan

et al. 2019

Physics

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We have investigated numerically the dynamics of quantum Fisher information (QFI) and quantum entanglement (QE) of a two moving two-level atomic systems interacting with a coherent and thermal field in the presence of intrinsic decoherence (ID) and Kerr (non-linear medium) and Stark effects. The state of the entire system interacting with coherent and thermal fields is evaluated numerically under the influence of ID and Kerr (nonlinear) and Stark effects. QFI and von Neumann entropy (VNE) decrease in the presence of ID when the atomic motion is neglected. QFI and QE show an opposite response during its time evolution in the presence of a thermal environment. QFI is found to be more susceptible to ID as compared to QE in the presence of a thermal environment. The decay of QE is further damped at greater time-scales, which confirms the fact that ID heavily influences the system's dynamics in a thermal environment. However, a periodic behavior of entanglement is observed due to atomic motion, which becomes modest under environmental effects. It is found that a non-linear Kerr medium has a prominent effect on the VNE but not on the QFI. Furthermore, it has been observed that QFI and QE decay soon under the influence of the Stark effect in the absence of atomic motion. The periodic response of QFI and VNE is observed for both the non-linear Kerr medium and the Stark effect in the presence of atomic motion. It is observed that the Stark, Kerr, ID, and thermal environment have significant effects during the time evolution of the quantum system. Entanglement's sudden death" (ESD) and entanglement sudden birth" (ESB) are observed as a result of entanglement measure in some fascinating and striking physical phenomena [16][17][18][19][20]. The QE is generated in the un-entangled qubits after a finite evolution time in the case of sudden birth. The coherent field is an electromagnetic field (EM) that is considered to be more classical than its quantum field [21]. Squeezed, coherent (even and odd) states of the EM field do not have minimum uncertainty, and they are non-classical quantum states and have a large number of applications for quantum communications and in the detection of weak signals [22].Recently, properties of the Tavis-Cummings model (TCM) were investigated when the time-dependent interaction with field was observed. Open and closed quantum systems were studied in the case of QE between two atoms (qubits) [23,24]. Moreover, a three-photon process was discussed in the case of the QE of two moving atoms interacting with a single-mode field [25]. In [26], the authors studied the atomic Wehrl entropy (AWE) of a V-type three-level atomic system interacting with a two-mode squeezed vacuum state, and the results showed that atomic motion and mode structure play significant and prominent roles in the evolution of AWE.There is always a possibility that the real physical system naturally interacts with the surrounding environment. Decoherence or dissipation may be generated due to the interaction of the quantum system wi...

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Quantum entanglement and position–momentum entropic squeezing of a moving Lambda-type three-level atom interacting with a single-mode quantized field with intensity-dependent coupling

Cited by 40 publications

References 73 publications

Dynamics of physical properties of a single-mode quantized field non-linearly and non-resonantly interacting with two V-type three-level atoms passing consecutively through a cavity

Dynamics of physical properties of a single-mode quantized field non-linearly and non-resonantly interacting with two V-type three-level atoms passing consecutively through a cavity

The influence of spontaneously generated coherence on atom-photon entanglement in a Λ-type system with an incoherent pump

Quantum Fisher Information and Entanglement of Moving Two Two-Level Atoms under the Influence of Environmental Effects

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