How Stochastic Strictly Incoherent Operations Affect Coherence in Decoherence Channels

Abstract

In this paper, we aim to investigate the freezing of quantum coherence for Bell-diagonal states by using stochastic strictly incoherence operations in non-dissipative decoherence environments. We find that quantum coherence of the Bell-diagonal states, which is subject to the stochastic strictly incoherence operations, becomes more stable. The stochastic strictly incoherent operation not only increases quantum coherence, but also keeps the quantum coherence intact in decoherence channel. It means that quantum coherence can be frozen with the growth of the noisy strength. This is because the stochastic strictly incoherence operations are free ones, this process will not produce quantum coherence.