Dynamics of a Moving Two-Level Atom Under the Influence of Intrinsic Decoherence

Anwar, S. Jamal; Sayyam,; Usman, M.

doi:10.1007/s10946-018-9747-8

Cited by 3 publications

(2 citation statements)

References 30 publications

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“…υ is the frequency of oscillation. The interaction Hamiltonian of the two two-level atomic systems for the case that is not resonant can be given as [60,61]…”

Section: The System Hamiltonian and Its Dynamicsmentioning

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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“…υ is the frequency of oscillation. The interaction Hamiltonian of the two two-level atomic systems for the case that is not resonant can be given as [60,61]…”

Section: The System Hamiltonian and Its Dynamicsmentioning

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

Self Cite

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“…The last decade has been very prolific in this field we want to board, the community has taken the task to study a vast amount of systems that can experience intrinsic decoherence. We can see research on quantification of non-classicality [9], qubits for quantum information processing [10], bipolar spin systems [11], quantum dot correlations [12], Heisenberg XYZ spin chains, quantum-memory-assisted two-qubit, and the temporal evolution of quantum correlations [13,14,15], quantum-memory-assisted entropic uncertainty, mixedness, and entanglement dynamics in two-qubit system [16], symmetric spin-orbit model [17], two-qubit quantum Fisher information [18], two-qubit maximally entangled Bell states [19], trapped ions [20], isolated Heisenber and Aubry-André spin models [21], two coupled quantum dots [22], N-level atomic system [23], two-coupled qubit two-level cavity [24], twolevel atom [25], state transfer in spin channels [26], Heisenber anisotropic interaction [27], nonlocal advantage of quantum coherence [28], qutrit teleportation [29], and quantum dense coding [30]. When we look at specific examples related optomechanical systems, we find notable works on Jaynes-Cummings under intrinsic decoherence [31,32,33], bimodal multiquanta Jaynes-Cummings [34], entanglement two Tavis-Cummings (no-RWA JC) [35], and ultra-strong coupled harmonic oscillator in cavities [36].…”

Section: Introductionmentioning

confidence: 99%

Intrinsic decoherence dynamics in the three-coupled harmonic oscillators interaction

Urzúa¹,

Moya‐Cessa

2023

Int. J. Mod. Phys. B

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A system of three-coupled quantized fields is studied under the intrinsic decoherence scheme given by the Milburn equation. Taking the closed analytical form of this relation, without second-order approximation, we arrive at an explicit analytical solution for the wavefunction dynamics. We show the decaying behavior in the number of modes of each quantized field for suitable initial conditions. One of the modes goes coherently driven, and the others are vacuum states. We discuss the redistribution of the excitations.

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Moving mirror-field dynamics under intrinsic decoherence

Urzúa,

Moya-Cessa

2023

Mod. Phys. Lett. B

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In this paper, we study the decaying dynamics in the mirror-field interaction by means of the intrinsic decoherence scheme. Factorization of the mirror-field Hamiltonian with the use of displacement operators allows us to calculate the explicit solution to Milburn’s equation for arbitrary initial conditions. We show expectation values, correlations, and Husimi functions for the solutions obtained.

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Dynamics of a Moving Two-Level Atom Under the Influence of Intrinsic Decoherence

Cited by 3 publications

References 30 publications

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

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

Intrinsic decoherence dynamics in the three-coupled harmonic oscillators interaction

Moving mirror-field dynamics under intrinsic decoherence

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