1207.1538 (Heng-Na Xiong et al.)

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

Heng-Na Xiong, Wei-Min Zhang, Matisse Wei-Yuan Tu, Daniel Braun

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.

View original: http://arxiv.org/abs/1207.1538