Phase Diagram and Dynamics of Spin–Orbit Coupling Bose–Josephson Junction in Optical Cavity

We use phase diagrams to study the mean-field dynamics of a spin–orbit coupled Bose–Josephson junction loaded in an optical cavity. We find that the spin Bose Josephson junction has four more combinations of 0- and π-phase motion modes than the bare junction. The spin–orbit coupling strength, the sp...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2021-07, Vol.90 (7), p.74602
Main Authors: Pan, Jing-Zhi, Chen, Zheng-Fang, Feng, Jian, Ye, Hui-Liang, Zhang, Yi-Cai, Liu, Chao-Fei
Format: Article
Language:English
Subjects:
Josephson junctions
Orbital mechanics
Phase diagrams
Spin dynamics
Spin-orbit interactions
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Summary:We use phase diagrams to study the mean-field dynamics of a spin–orbit coupled Bose–Josephson junction loaded in an optical cavity. We find that the spin Bose Josephson junction has four more combinations of 0- and π-phase motion modes than the bare junction. The spin–orbit coupling strength, the spin–weak atoms interaction energy, the cavity field drive and the cavity field detuning can increase the number of stable points of the Bose–Josephson junction energy. While the increase in cavity field dissipation would decrease the number of stable points of the energy. The increase in the number of 0- and π-phase motion modes will change the motion trajectory of atoms in the junction from a normal order to a disorder. This work indicates that quantum measurement and quantum simulation can be improved by controlling the dynamical quantities of spin atoms in a cavity.
ISSN:0031-9015
1347-4073
DOI:10.7566/JPSJ.90.074602