Volume 536, Issue 11 2400179
Research Article

Photon-Assisted Quantum Phase Transitions in a Cavity Optomechanical System with Two Nonlinear Mechanical Modes

Deng-Kui Jiang

Deng-Kui Jiang

Key Laboratory of Low-Dimension Quantum Structures and Quantum Control of Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications, XJ-Laboratory and Department of Physics, Hunan Normal University, Changsha, 410081 China

College of Mathematics and Science, Hunan University of Arts and Science, Changde, 450002 China

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Rui Zhang

Rui Zhang

Key Laboratory of Low-Dimension Quantum Structures and Quantum Control of Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications, XJ-Laboratory and Department of Physics, Hunan Normal University, Changsha, 410081 China

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Ying Liu

Ying Liu

Key Laboratory of Low-Dimension Quantum Structures and Quantum Control of Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications, XJ-Laboratory and Department of Physics, Hunan Normal University, Changsha, 410081 China

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Le-Man Kuang

Corresponding Author

Le-Man Kuang

Key Laboratory of Low-Dimension Quantum Structures and Quantum Control of Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications, XJ-Laboratory and Department of Physics, Hunan Normal University, Changsha, 410081 China

Synergetic Innovation Academy for Quantum Science and Technology, Zhengzhou University of Light Industry, Zhengzhou, 450002 China

E-mail: [email protected]

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First published: 30 September 2024
Citations: 1

Abstract

Photon-assisted quantum phase transitions (QPTs) are studied in a cavity optomechanical system that consists of one optical cavity and two nonlinear mechanical resonators and explore ground-state properties of quantum phases. It is indicated that the cavity mode can induce effective two-phonon tunneling interaction between two mechanical resonators. It is found that QPTs between the localization phase (LP) and delocalization phase (DP) of phonons can happen through tuning the phonon tunneling interaction. It is shown that the photon-assisted QPT is the second order QPT. Ground-state properties of the quantum phases are also investigated. It is indicated that the ground state of the LP is a separable squeezed state while the ground state of the DP is an entangled state. The results open a new way to engineer quantum phases and QPTs in macroscopic mechanical systems and can benefit a wide range of criticality-enhanced quantum sensing applications.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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