New application of non-Hermitian Hamiltonian operator in solving master equation for laser process

Abstract

We find that laser process can be equivalently described by a symplectic evolution in the context of thermo field dynamics, and the corresponding coherent state evolution for the corresponding master equation is recognized. More interestingly, this embodies a new application of non-Hermitian Hamiltonian operator which can well expose the entanglement between the system and its environment.

Keywords

non-Hermitian / master equation / laser process

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg