Journal
PHYSICAL REVIEW A
Volume 92, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.92.013852
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Funding
- Postdoctoral Science Foundation of China [2014M550019]
- National Natural Science Foundation of China [11422437, 11174027, 11121403, 61025022, 61328502]
- 973 program [2012CB922104, 2014CB921403]
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We propose to realize mechanical parity-time (PT) symmetry in two coupled optomechanical systems. To provide gain to one mechanical resonator and the same amount of damping to the other, the two optical cavities should be driven by blue-and red-detuned laser fields, respectively. After adiabatically eliminating the degrees of freedom of the cavity modes, we derive a formula to describe the PT symmetry of two coupled mechanical resonators. Mechanical PT-symmetric phase transition is demonstrated by the dynamical behavior of the mechanical resonators. Moreover, we study the effect of the quantum noises on the dynamical behavior of the mechanical resonators when the system is in the quantum regime.
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