Dynamic entanglement transfer in a double-cavity optomechanical system

Huan, Tiantian; Zhou, Ri-Gui; Ian, Hou

doi:10.1103/physreva.92.022301

Cited by 36 publications

(19 citation statements)

References 42 publications

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“…Since the mechanical harmonic oscillator is a typical represent of classical systems 15 , cavity optomechanical system provides a unique platform for exploring the novel quantum phenomena at the macroscopic level such as quantum entanglement. In recent years, a number of schemes covering this topic have been proposed based on the cavity optomechanical system 15 19 20 21 22 23 24 25 26 27 28 . In 2007, Vitali et al .…”

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confidence: 99%

Robust entanglement between a movable mirror and atomic ensemble and entanglement transfer in coupled optomechanical system

Bai

Wang

et al. 2016

Sci Rep

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We propose a scheme for the creation of robust entanglement between a movable mirror and atomic ensemble at the macroscopic level in coupled optomechanical system. We numerically simulate the degree of entanglement of the bipartite macroscopic entanglement and show that it depends on the coupling strength between the cavities and is robust with respect to the certain environment temperature. Inspiringly and surprisingly, according to the reported relation between the mechanical damping rate and the mechanical frequency of the movable mirror, the numerical simulation result shows that such bipartite macroscopic entanglement persists for environment temperature up to 170 K, which breaks the liquid nitrogen cooling and liquid helium cooling and largely lowers down the experiment cost. We also investigate the entanglement transfer based on this coupled system. The scheme can be used for the realization of quantum memories for continuous variable quantum information processing and quantum-limited displacement measurements.

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confidence: 99%

Robust entanglement between a movable mirror and atomic ensemble and entanglement transfer in coupled optomechanical system

Bai

Wang

et al. 2016

Sci Rep

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“…In this work, combination of the modulation and the dissipation is considered. We expand the optomechanical model in [17] to three-mode optomechanical system, which is similar to that in [43] and [44] except being driven by periodic modulation field. A single-cavity optomechanical system usually requires an external laser to drive the mechanical resonator out of its zero steady state at equilibrium position.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of steady-state bosonic squeezing and entanglement in a dissipative optomechanical system

Liao¹,

Xie²,

Shang³

et al. 2018

Opt. Express

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We systematically study the influence of amplitude modulation on the steady-state bosonic squeezing and entanglement in a dissipative three-mode optomechanical system, where a vibrational mode of the membrane is coupled to the left and right cavity modes via the radiation pressure. Numerical simulation results show that the steady-state bosonic squeezing and entanglement can be significantly enhanced by periodically modulated external laser driving either or both ends of the cavity. Remarkably, the fact that as long as one periodically modulated external laser driving either end of the cavities is sufficient to enhance the squeezing and entanglement is convenient for actual experiment, whose cost is that required modulation period number for achieving system stability is more. In addition, we numerically confirm the analytical prediction for optimal modulation frequency and discuss the corresponding physical mechanism.

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“…The quantum correlations are responsible for a principal advantages of quantum devises over their classical counterparts. The problems of correlations between remote systems [1,2], formation [3][4][5][6][7][8] and transfer of quantum correlations [9][10][11][12][13] are getting an increasing meaning because of progress in quantum information processing which includes quantum state creation and information transfer [14][15][16][17][18]. Obviously, the relation between the information transfer and quantum correlations exist; however it can not be simply released.…”

Section: Introductionmentioning

confidence: 99%

Relay entanglement and clusters of correlated spins

Doronin

Zenchuk

2018

Quantum Inf Process

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Considering a spin-1/2 chain, we suppose that the entanglement passes from a given pair of particles to another one, thus establishing the relay transfer of entanglement along the chain.Therefore, we introduce the relay entanglement as a sum of all pairwise entanglements in a spin chain. For more detailed studying the effects of remote pairwise entanglements, we use the partial sums collecting entanglements between the spins separated by up to a certain number of nodes.The problem of entangled cluster formation is considered, and the geometric mean entanglement is introduced as a characteristics of quantum correlations in a cluster. Generally, the life-time of a cluster decreases with an increase in its size. PACS numbers:

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Dynamic entanglement transfer in a double-cavity optomechanical system

Cited by 36 publications

References 42 publications

Robust entanglement between a movable mirror and atomic ensemble and entanglement transfer in coupled optomechanical system

Robust entanglement between a movable mirror and atomic ensemble and entanglement transfer in coupled optomechanical system

Enhancement of steady-state bosonic squeezing and entanglement in a dissipative optomechanical system

Relay entanglement and clusters of correlated spins

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