The n-th Decay Rate of Coherence for Bell-diagonal States Under Quantum Channels

  title={The n-th Decay Rate of Coherence for Bell-diagonal States Under Quantum Channels},
  author={Huaijing Huang and Zhaoqi Wu and Shao-Ming Fei},
  journal={International Journal of Theoretical Physics},
  pages={2912 - 2923}
We study the degree to which the coherence of quantum states is affected by noise. We give the definition of the n-th decay rate and investigate the coherence of Bell-diagonal states under n iterations of channels. We derive explicit formulas of the n-th decay rates based on l1 norm of coherence, relative entropy of coherence and skew information-based coherence. It is found that the larger n is, the faster the n-th decay rate decreases as the parameter p of Bell-diagonal states increases… 
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