Realization and application of parity-time-symmetric oscillators in quantum regime
arXiv:1609.02403 · doi:10.1103/PhysRevA.95.023827
Abstract
Although people have already artificially formed parity--time () symmetry with gain and loss in a balanced manner, it is still a defect that the gain is restricted to semi--classical but not full quantum. Here we propose and analyze a theoretical scheme to realize full quantum oscillator --symmetry. The quantum gain is provided by a dissipation optical cavity with blue detuned laser field. After adiabatically eliminating the cavity modes, we give an effective master equation, which is a more complete quantum description compared with non--Hermitian Hamiltonian, to reveal the quantum behaviors of such a gain oscillator. This kind of --symmetry can eliminate the dissipation effect in quantum regime. As examples, we finally apply --symmetric oscillators to enhance optomechanically induced transparency and to preserve oscillator non--classical state.
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