The strong-to-weak coupling transition in optomechanical state transfer is interpreted as a passive PT-symmetry breaking transition, with exact Lindblad/non-Hermitian agreement only in the single-excitation subspace.
PT-symmetric photonic quantum systems with gain and loss do not exist
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abstract
We discuss the impact of gain and loss on the evolution of photonic quantum states and find that PT-symmetric quantum optics in gain/loss systems is not possible. Within the framework of macroscopic quantum electrodynamics we show that gain and loss are associated with non-compact and compact operator transformations, respectively. This implies a fundamentally different way in which quantum correlations between a quantum system and a reservoir are built up and destroyed.
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quant-ph 1years
2019 1verdicts
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$\mathcal{PT}$-symmetry from Lindblad dynamics in an optomechanical system
The strong-to-weak coupling transition in optomechanical state transfer is interpreted as a passive PT-symmetry breaking transition, with exact Lindblad/non-Hermitian agreement only in the single-excitation subspace.