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

摘要

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