Macroscopic Quantum Superposition in Opto-Mechanical System with Ultrastrong Coupling Light-Matter Interaction

Zheng, Li; Chen, Dongni; Peng, Zhenyang; Shi, Ying; Liu, Yujie; Wang, Ying-Dan

doi:10.1007/s10773-019-04368-1

Cited by 3 publications

(3 citation statements)

References 19 publications

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“…According to equation (22), the evolution state of the whole system at time t in the Schrödinger picture can be obtained as and |j ñ g m 3 are the evolution states of the mechanical oscillator at time t, having the form of…”

Section: Mmentioning

confidence: 99%

“…In figure 3, we give the demonstration of the evolution curves of | b b á ñ + -with t for g = 0 (which corresponds to the circumstances using the Rabi model [22]) and g = 0.25. It can be seen from the two curves that the minimum of | b b á ñ + -for g = 0.25 can get down to zero faster than the case for g = 0, and sustaining zero for a much longer time, following which would improve the distinguishability of the macroscopically distinct coherent state in the Rabi-Stark model.…”

Section: Mmentioning

confidence: 99%

“…In one of our previous works, we have proposed a scheme to prepare a macroscopically distinct mechanical superposition states of the mechanical oscillator using the QRM [22]. However, the distinguishable feature of the generated state is not strong.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhancement of feasibility of macroscopic quantum superposition state with the quantum Rabi-Stark model

Wang¹,

Ding²,

Xiong³

et al. 2022

Commun. Theor. Phys.

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We propose an efficient scheme to generate macroscopically quantum superposition state with a cavity optomechanical system, which is composed of a quantum Rabi-Stark model coupling to a mechanical oscillator. In a low-energy subspace of the Rabi-Stark model, the dressed states and then the effective Hamiltonian of the system are given. Due to the coupling of the mechanical oscillator and the atomcavity system, if the initial state of the atom-cavity system is one of the dressed states, the mechanical oscillator will evolve into a corresponding coherent state. Thus, if the initial state of the atom-cavity system is a superposition of two dressed states, a coherent state superposition of the mechanical oscillator can be generated. The quantum coherence and their distinguishable properties of the two coherent states are exhibited by Wigner distribution. We show that the Stark term can enhance significantly the feasibility and quantum coherence of the generated macroscopic quantum superposition state of the oscillator.

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Section: Mmentioning

confidence: 99%

Section: Mmentioning

confidence: 99%