Dynamics of Quantum Coherence in Bell-Diagonal States under Markovian Channels

Yao-Kun Wang,Shao-Ming Fei,Zhi-Xi Wang

Tab. 9 Correlation coefficients for the $n$ times quantum operations: a bit-flip channel and a phase-flip channel (${\rm BF}^{n}$-${\rm PF}^{n}$), a bit-flip channel and a bit-phase-flip channel(${\rm BF}^{n}$-${\rm BPF}^{n}$), a phase-flip channel and a bit-phase-flip channel (${\rm PF}^{n}$-${\rm BPF}^{n}$), where $p=1-\text{exp}(-\gamma t)$, $q=1-\text{exp}(-\gamma't)$, and $\gamma$ and $\gamma'$ are the phase damping rates for the channels on qubits $A$ and $B$,respectively.