Entanglement protection in Jaynes–Cummings model

Fasihi, M. A.; Mojaveri, B.

doi:10.1007/s11128-019-2195-8

Cited by 18 publications

(4 citation statements)

References 31 publications

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“…Notice that, entanglement protection and coping with its attenuation, and thus its stability, are some of the main purposes of the recent researches in the entanglement generation schemes. [ 32–36 ]…”

Section: A Brief Overviewmentioning

confidence: 99%

Macroscopic Mechanical Entanglement Stability in Two Distant Dissipative Optomechanical Systems

2022

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A theoretical scheme for the stable entanglement generation of two remote mechanical modes is introduced. Two identical optomechanical systems, each constituting a single‐mode optical field as well as a qubit and a moveable mirror driven by an external pump field, are considered. To make the model more realistic, atomic, photonic, and phononic dissipations are considered. The time‐dependent state of each subsystem is obtained, analytically. Then, by an appropriate Bell‐state measurement (BSM) on the state of the whole system (first approach), the entanglement of two mechanical modes is created. As a second parallel approach, appropriate atomic measurement is applied after the BSM. According to these numerical simulations via concurrence, the noteworthy features are as follows. There exists optimum value of photon–phonon coupling strength for obtaining the steady‐state entanglement; by choosing appropriate values of dissipation, photon–phonon coupling, and pump amplitude, a significant degree and stable entanglement between the two mechanical modes are accessible. The present scheme opens new practical perspectives in constructing stable entanglement between two remote mechanical modes and can be helpful to realize quantum memories for quantum information processing and establishing long‐distance quantum communication networks.

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Section: A Brief Overviewmentioning

confidence: 99%

Macroscopic Mechanical Entanglement Stability in Two Distant Dissipative Optomechanical Systems

2022

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“…The JCM depicts a two-level quantum system (a spin or a qubit) interacting with a single bosonic mode of radiation. Despite its solvability [2,4,9], the model remains realistic enough to stimulate research in diverse fields, encompassing applied group theory [9][10][11], investigations related to quantum integrability [12,13], and extending to quantum information processing [14][15][16]. This text further explores a specific application of the Jaynes-Cummings model for detecting non-orthogonal quantum states, as proposed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Pure Decoherence of the Jaynes–Cummings Model: Initial Entanglement with the Environment, Spin Oscillations and Detection of Non-Orthogonal States

Dajka

2024

Symmetry

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A model based on pure decoherence for the Jaynes–Cummings spin–boson system, coupled through its integral of motion to an infinite bosonic bath, is proposed and examined. The properties of the spin oscillation process suggest an initial entanglement between the environment and the spin–boson degrees of freedom. The study demonstrates that the potential applicability of the Jaynes–Cummings model in detecting non-orthogonal bosonic states is preserved in the presence of pure decoherence.

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“…These methods can all effectively protect entanglement of qubits from decoherence. There are some other control methods to protect quantum entanglement, such as applying switching pulse [43,44], detuning between modulation system and reservoir [45], engineering quantum environment [46] and applying local classical field [47].…”

Section: Introductionmentioning

confidence: 99%

Modulating entanglement dynamics of two V-type atoms in dissipative cavity by detuning and weak measurement reversal

Li,

Wang,

Zou

et al. 2024

Phys. Scr.

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It is studied how to modulate entanglement dynamics of two V-type atoms in dissipative cavity by detuning, weak measurement and weak measurement reversal. The analytical solution of this model is obtained by solving Schr"{o}dinger Equation after diagonalizing Hamiltonian of dissipative cavity. It is discussed in detail how the entanglement dynamics is influenced by cavity-reservoir coupling, spontaneously generated interference (SGI) parameter, detuning between cavity with reservoir and weak measurement reversal. The results show that the entanglement dynamics of different initial states obviously depends on coupling, SGI parameter, detuning and reversing measurement strength. The stronger coupling, the smaller SGI parameter, the larger detuning and the bigger reversing measurement strength can all not only protect but also generate the entanglement, and the detuning is more effectively in the strong coupling regime than the weak measurement reversal, which is more effectively than the SGI parameter. We also provide the physical interpretations for these results.

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Entanglement protection in Jaynes–Cummings model

Cited by 18 publications

References 31 publications

Macroscopic Mechanical Entanglement Stability in Two Distant Dissipative Optomechanical Systems

Macroscopic Mechanical Entanglement Stability in Two Distant Dissipative Optomechanical Systems

Pure Decoherence of the Jaynes–Cummings Model: Initial Entanglement with the Environment, Spin Oscillations and Detection of Non-Orthogonal States

Modulating entanglement dynamics of two V-type atoms in dissipative cavity by detuning and weak measurement reversal

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