Dynamically stabilized decoherence-free states in non-Markovian open fermionic systems

Abstract

Decoherence-free subspaces (DFSs) provide a strategy for protecting the dynamics of an open system from decoherence induced by the system-environment interaction. So far, DFSs have been primarily studied in the framework of Markovian master equations. In this work, we study decoherence-free (DF) states in the general setting of a non-Markovian fermionic environment. We identify the DF states by diagonalizing the non-unitary evolution operator for a two-level fermionic system attached to an electron reservoir. By solving the exact master equation, we show that DF states can be stabilized dynamically.

11 pages, 3 figures. Any comments are welcome

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• Optomechanical second-order sidebands and group delays in a spinning resonator with parametric amplifier and non-Markovian effects
• Multiple single-photon generations in three-level atoms coupled to cavity with non-Markovian effects
• Regular patterns in the information flow of local dephasing channels
• Non-Markovian quantum dissipative processes with the same positive features as Markovian dissipative processes
• Dressed bound states and non-Markovian dynamics with a whispering-gallery-mode microcavity coupled to a two-level atom and a semi-infinite photonic waveguide