Manipulation and enhancement of Einstein-Podolsky-Rosen steering between two mechanical modes generated by two Bogoliubov dissipation pathways

Guo, Qi; Wei, Mei-Rong; Bai, Cheng‐Hua; Zhang, Yuchi; Li, Gang; Zhang, Tiancai

doi:10.1103/physrevresearch.5.013073

Cited by 10 publications

(1 citation statement)

References 70 publications

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“…We then characterise the correlations established between the mirrors in terms of mutual information and quantum discord, the latter being the best quantifier when one is interested in asymmetries between the two mirrors. Asymmetrical correlations like quantum discord and EPR steering had been investigated in other optomechanical setup [39][40][41][42]. We show that asymmetric non-zero correlations persists even in the steady state.…”

Section: Introductionmentioning

confidence: 82%

Temperature gradient and asymmetric steady state correlations in dissipatively coupled cascaded optomechanical systems

Pellitteri,

Palma,

Lorenzo

2023

Phys. Scr.

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The interaction between a light mode and a mechanical oscillator via radiation pressure in optomechanical systems is an excellent platform for a multitude of applications in quantum technologies. In this work we study the dynamics of a pair of optomechanical systems interacting dissipatively with a wave guide in a unidirectional way. Focusing on the regime where the cavity modes can be adiabatically eliminated, we derive an effective coupling between the two mechanical modes and explore the classical and quantum correlations established between the modes in both the transient and the stationary regime, highlighting their asymmmetrical nature due to the unidirectional coupling. Noteworthy, we find that a constant amount of steady correlations can exist at long times. Furthermore we show that this unidirectional coupling establishes a temperature gradient between the mirrors, depending on the frequencies’ detuning. We additionally analyze the power spectrum of the output guide field and we show how, thanks to the chiral coupling, from such spectrum it is possible to reconstruct the spectra of each single mirror.

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Section: Introductionmentioning

confidence: 82%

Temperature gradient and asymmetric steady state correlations in dissipatively coupled cascaded optomechanical systems

Pellitteri,

Palma,

Lorenzo

2023

Phys. Scr.

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Generation of Entanglement and Perfect One‐Way EPR Steering via Kerr Nonlinearity in Cavity Magnonics System

Wang,

Bai,

Guo

2024

Annalen der Physik

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A scheme is proposed for generating entanglement and achieving perfect one‐way EPR (Einstein–Podolsky–Rosen) steering in a cross‐shaped cavity magnonics system via the Kerr effect arising from magnetocrystalline anisotropy. The scheme involves two microwave cavities with distinct quality factors that simultaneously couple to a magnon mode of a macroscopic yttrium‐iron‐garnet sphere via the magnetic‐dipole interaction. It is demonstrated that both the bipartite and tripartite entanglement among the three modes will be generated due to Kerr nonlinearity, and the perfect one‐way EPR steering will also be achieved between the cavity with higher quality factor and the magnon mode. Notably, this scheme differs from conventional protocols that produce asymmetric EPR steering by introducing additional unbalanced losses or noises; instead, it can generate and manipulate one‐way EPR steering solely by adjusting the detuning between the magnon mode and the microwave drive field. It is also analyzed that the robustness of the entanglement and EPR steering against the dissipation of magnon and environmental temperature. The present scheme may provide a promising platform and an efficient quantum resource for quantum information processing.

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Controlling Remote Entanglement and One‐Way Steering Via a Squeezed Vacuum Field and an Optical Parametric Amplifier

Wei,

Wang,

Zhang

et al. 2024

Adv Quantum Tech

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A scheme is proposed for generating remote entanglement and one‐way Einstein‐Podolsky‐Rosen (EPR) steering between two mechanical resonators in a cavity optomechanical system. Both mechanical resonators are coupled to a common cavity, which contains an optical parametric amplifier (OPA) and is driven by a squeezed vacuum field. The entanglement and EPR steering can be generated by the squeezed vacuum field and significantly enhanced by the gain of OPA. By manipulating the ratio of two effective optomechanical coupling strengths, the asymmetric EPR steering with excellent controllability on the direction, even the one‐way EPR steering can be achieved. Moreover, both the squeezed vacuum field and the OPA can effectively enhance the robustness of EPR steering against the environment temperature, and the temperature‐dependent one‐way EPR steering is explored. This work paves the way toward generating macroscopic mechanical entanglement and EPR steering with potential applications in quantum information processing.

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Manipulation and enhancement of Einstein-Podolsky-Rosen steering between two mechanical modes generated by two Bogoliubov dissipation pathways

Cited by 10 publications

References 70 publications

Temperature gradient and asymmetric steady state correlations in dissipatively coupled cascaded optomechanical systems

Temperature gradient and asymmetric steady state correlations in dissipatively coupled cascaded optomechanical systems

Generation of Entanglement and Perfect One‐Way EPR Steering via Kerr Nonlinearity in Cavity Magnonics System

Controlling Remote Entanglement and One‐Way Steering Via a Squeezed Vacuum Field and an Optical Parametric Amplifier

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