Enhancement of mechanical entanglement in hybrid optomechanical system

Sohail, Amjad; Rana, Mishal; Ikram, Salma; Munir, Tariq; Mallhi, Tauqeer Hussain; Ahmed, Rizwan; Yu, Chang-shui

doi:10.1007/s11128-020-02888-y

Cited by 25 publications

(15 citation statements)

References 51 publications

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“…Immediately afterward, Paternostro et al proposed a scheme showing signatures of multipartite entanglement generated by radiation pressure in a cavity system with a movable mirror [24]. Currently, the main concern of researchers is the entanglement between various modes (two-mode or even threemode) in various hybrid cavity optomechanical systems and the improvement of entanglement performance [25][26][27][28][29][30][31][32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Entanglement and coherence in a hybrid Laguerre–Gaussian rotating cavity optomechanical system with two-level atoms

Singh¹,

Peng

Asjad

et al. 2021

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

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We theoretically investigate quantum entanglement and coherence in a hybrid Laguerre-Gaussian rotating cavity optomechanical system with two-level atoms, where cavity and mechanical modes are coupled through the exchange of orbital angular momentum. Our study shows that the injection of atoms with a suitable choice of the physical parameters can significantly improve the degree of optomechanical entanglement in all aspects. In the study of quantum coherence research, we show more comprehensively the negative and positive effects of atoms on the coherence. The result obtained is that only when the atom is significantly offresonant to driving field, the coupling strength in between the atoms and light field increases and the quantum coherence can be enhanced, otherwise it will reduce quantum coherence. In addition, the atomic decay suppresses quantum coherence phenomenon.

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Section: Introductionmentioning

confidence: 99%

Entanglement and coherence in a hybrid Laguerre–Gaussian rotating cavity optomechanical system with two-level atoms

Singh¹,

Peng

Asjad

et al. 2021

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

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“…Until now, numerous schemes have been presented to generate various types of entanglement in optomechanical systems from different point of views, such as stationary photon entanglement and the strong tripartite entanglement between the photonic and phononic output fields [ 8 ] and realizing stationary entanglement for optomechanical hybrid systems. [ 9,10 ] In addition, entanglement transfer in optomechanical cavities is analyzed in [11, 12]. For more practical realization, in ref.…”

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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“…[39] In addition to the above, optomechanical systems have been experimentally used because of the development of optical micro-cavity technology. They provide an excellent test bed macroscopic entangled state, [40][41][42] coherent state, [43,44] squeezed state, [45,46] ground state cooling, [47] and optomechanically induced transparency (OMIT). [48][49][50][51][52] In principle, nothing from the principles of quantum mechanics prohibits macroscopic entanglement.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Entanglement and Controlling Quantum Steering in a Laguerre–Gaussian Cavity Optomechanical System with Two Rotating Mirrors

et al. 2023

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Gaussian quantum steering is a type of quantum correlation in which two entangled states exhibit asymmetry. An efficient theoretical proposal is presented for the control of quantum steering and enhancement of entanglement in a Laguerre-Gaussian (LG) cavity optomechanical system. The system contains two rotating mirrors and a coherently driven optical parametric amplifier (OPA). The numerical results show significantly improved mirror-mirror and mirror-cavity entanglements by controlling the system parameters such as parametric gain, parametric phase, and the frequency of the two rotating mirrors. In addition to bipartite entanglement, our system also exhibits mirror-cavity-mirror tripartite entanglement as well. Another intriguing finding is the control of quantum steering, for which several results were obtained by investigating it for various system parameters. It is shown that the steering directivity is primarily determined by the frequency of two rotating mirrors. Furthermore, for two rotating mirrors, quantum steering is found to be asymmetric both one-way and two-way. Therefore, it can be asserted that the current proposal may help in the understanding of non-local correlations and entanglement verification tasks.

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Enhancement of mechanical entanglement in hybrid optomechanical system

Cited by 25 publications

References 51 publications

Entanglement and coherence in a hybrid Laguerre–Gaussian rotating cavity optomechanical system with two-level atoms

Entanglement and coherence in a hybrid Laguerre–Gaussian rotating cavity optomechanical system with two-level atoms

Macroscopic Mechanical Entanglement Stability in Two Distant Dissipative Optomechanical Systems

Enhanced Entanglement and Controlling Quantum Steering in a Laguerre–Gaussian Cavity Optomechanical System with Two Rotating Mirrors

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