Finite-temperature Dicke phase transition and the collapse of superradiant phase in an optomechanical-atomic cavity
We mainly investigate Dicke phase transition at finite temperature in an optomechanical-atomic cavity by means of the functional path-integral approach. By the thermodynamic equilibrium equation, the mean photon number, the scaled atomic population, the mean phonon number, the average energy and the...
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2021
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oai:doaj.org-article:4103ceffe8fc41a28e90a247e10962052021-11-14T04:32:29ZFinite-temperature Dicke phase transition and the collapse of superradiant phase in an optomechanical-atomic cavity2211-379710.1016/j.rinp.2021.104939https://doaj.org/article/4103ceffe8fc41a28e90a247e10962052021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2211379721009621https://doaj.org/toc/2211-3797We mainly investigate Dicke phase transition at finite temperature in an optomechanical-atomic cavity by means of the functional path-integral approach. By the thermodynamic equilibrium equation, the mean photon number, the scaled atomic population, the mean phonon number, the average energy and the rich phase diagram are depicted in the existence of the nonlinear atom–photon interaction, the nonlinear photon–photon coupling strength, the pump–cavity detuning and the finite temperature. Beside Dicke phase transition from the normal phase (NP) to the superraidant phase (SP) at finite temperature, the collapse of the SP and the dynamically unstable state (DUS) are revealed showing the effects of the photon–phonon coupling strength ξ and nonlinear atom–photon interaction U. Meanwhile, a new phase transition occurs from the SP to the dynamically unstable state (DUS) at the turning point gtwith the existence of ξ or U. The region of the SP can be completely eliminated by the mechanically and thermally stimulated photon-emission. The entropy and corresponding specific heats are presented to demonstrate the corresponding critical behavior at the phase transition point.Ni LiuShan HuangShufang JiaJ.-Q. LiangHebin LiElsevierarticleDicke phase transitionOptomechanical cavityImaginary-time functional path-integral approachPhysicsQC1-999ENResults in Physics, Vol 31, Iss , Pp 104939- (2021) |
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Dicke phase transition Optomechanical cavity Imaginary-time functional path-integral approach Physics QC1-999 |
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Dicke phase transition Optomechanical cavity Imaginary-time functional path-integral approach Physics QC1-999 Ni Liu Shan Huang Shufang Jia J.-Q. Liang Hebin Li Finite-temperature Dicke phase transition and the collapse of superradiant phase in an optomechanical-atomic cavity |
| description |
We mainly investigate Dicke phase transition at finite temperature in an optomechanical-atomic cavity by means of the functional path-integral approach. By the thermodynamic equilibrium equation, the mean photon number, the scaled atomic population, the mean phonon number, the average energy and the rich phase diagram are depicted in the existence of the nonlinear atom–photon interaction, the nonlinear photon–photon coupling strength, the pump–cavity detuning and the finite temperature. Beside Dicke phase transition from the normal phase (NP) to the superraidant phase (SP) at finite temperature, the collapse of the SP and the dynamically unstable state (DUS) are revealed showing the effects of the photon–phonon coupling strength ξ and nonlinear atom–photon interaction U. Meanwhile, a new phase transition occurs from the SP to the dynamically unstable state (DUS) at the turning point gtwith the existence of ξ or U. The region of the SP can be completely eliminated by the mechanically and thermally stimulated photon-emission. The entropy and corresponding specific heats are presented to demonstrate the corresponding critical behavior at the phase transition point. |
| format |
article |
| author |
Ni Liu Shan Huang Shufang Jia J.-Q. Liang Hebin Li |
| author_facet |
Ni Liu Shan Huang Shufang Jia J.-Q. Liang Hebin Li |
| author_sort |
Ni Liu |
| title |
Finite-temperature Dicke phase transition and the collapse of superradiant phase in an optomechanical-atomic cavity |
| title_short |
Finite-temperature Dicke phase transition and the collapse of superradiant phase in an optomechanical-atomic cavity |
| title_full |
Finite-temperature Dicke phase transition and the collapse of superradiant phase in an optomechanical-atomic cavity |
| title_fullStr |
Finite-temperature Dicke phase transition and the collapse of superradiant phase in an optomechanical-atomic cavity |
| title_full_unstemmed |
Finite-temperature Dicke phase transition and the collapse of superradiant phase in an optomechanical-atomic cavity |
| title_sort |
finite-temperature dicke phase transition and the collapse of superradiant phase in an optomechanical-atomic cavity |
| publisher |
Elsevier |
| publishDate |
2021 |
| url |
https://doaj.org/article/4103ceffe8fc41a28e90a247e1096205 |
| work_keys_str_mv |
AT niliu finitetemperaturedickephasetransitionandthecollapseofsuperradiantphaseinanoptomechanicalatomiccavity AT shanhuang finitetemperaturedickephasetransitionandthecollapseofsuperradiantphaseinanoptomechanicalatomiccavity AT shufangjia finitetemperaturedickephasetransitionandthecollapseofsuperradiantphaseinanoptomechanicalatomiccavity AT jqliang finitetemperaturedickephasetransitionandthecollapseofsuperradiantphaseinanoptomechanicalatomiccavity AT hebinli finitetemperaturedickephasetransitionandthecollapseofsuperradiantphaseinanoptomechanicalatomiccavity |
| _version_ |
1718429951705743360 |