Strong quantum correlation in hybrid opto-mechanics

Anouz, Khadija El; Allati, Abderrahim El; Saif, Farhan

doi:10.1140/epjd/s10053-023-00792-5

Eur. Phys. J. D

2024

DOI: 10.1140/epjd/s10053-023-00792-5

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Strong quantum correlation in hybrid opto-mechanics

Khadija El Anouz,

Abderrahim El Allati,

Farhan Saif

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2024

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Cited by 3 publications

References 42 publications

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Engineering and control of the entanglement for four Magnon modes inside two microwave cavities

Imara,

El Anouz,

El Allati

2024

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

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We present a model for investigating the entanglement features of four magnon modes in four yttrium-iron-garnet spheres dispersed in two microwave cavities (each cavity containing two spheres), which are driven by a squeezed field under actual experimental conditions. Each two-magnon mode inside each cavity is coupled via a beam splitter. We solve the covariance matrix associated with the four magnons, taking into account the relevant physical parameters. To quantify the degree of entanglement, we use the logarithmic negativity measure. Our study focuses on two parts. First, we study the entanglement properties between magnon modes by modifying the system parameters, and comparing the results with those obtained when we use a single magnon in each cavity, i.e. when one of the two magnons is not coupled to the cavity. In the second part, we give a new method for enhancing and controlling entanglement between magnon modes. We analyze the case where one of the two magnons is not coupled to the cavity, which can result a significant entanglement. Indeed, this goal is met in our situation by including an effective magnon–magnon coupling into both cavities. However, at high temperatures, the entanglement is almost completely broken. It can withstand temperatures of up to hundreds of millikelvin when using an experimentally accessible two-mode squeezed source.

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Engineering and control of the entanglement for four Magnon modes inside two microwave cavities

Imara,

El Anouz,

El Allati

2024

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

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Quantum effect in a hybrid bose-einstein condensate opto-magnomechanical system

Imara,

El Anouz,

Saif

et al. 2024

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

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We present a hybrid opto-magno-mechanical cavity system consisting of an optical cavity that creates an opto-mechanical cavity with a fixed mirror, a magnon mode in a ferrimagnetic crystal linked to the movable mirror and an intracavity Bose-Einstein condensate. The mechanical displacement is coupled to the magnon by the magnetostriction force and to the optical cavity by the radiation pressure, and the latter is also weakly coupled to a Bose-Einstein condensate. We provide a strategy to measure and quantify entanglement using logarithmic negativity. In addition, we study the quantum or EPR steering in order to present the stationary quantum steering. We consider that all composite modes in our model are given in a Gaussian state described by a covariance matrix. In these studies, we focus on the interaction between the Bose-Einstein condensate and the magnonic modes in a ferrimagnetic crystal. It is important to note that we use experimentally controllable realizable parameters to observe the interaction of modes at temperatures in the microkelvin range.

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Generation of quantum correlations through optical parametric amplification in a hybrid optomechanical system

Kibret,

Beisie,

Mekonnen

et al. 2024

Eur. Phys. J. Plus

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Strong quantum correlation in hybrid opto-mechanics

Cited by 3 publications

References 42 publications

Engineering and control of the entanglement for four Magnon modes inside two microwave cavities

Engineering and control of the entanglement for four Magnon modes inside two microwave cavities

Quantum effect in a hybrid bose-einstein condensate opto-magnomechanical system

Generation of quantum correlations through optical parametric amplification in a hybrid optomechanical system

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