Measure-Independent Freezing of Quantum Coherence
  We find that all measures of coherence are frozen for an initial state in a strictly incoherent channel if and only if the relative entropy of coherence is frozen for the state. Our finding reveals the existence of measure-independent freezing of coherence, and provides an entropy-based dynamical condition in which the coherence of an open quantum system is totally unaffected by noise. 
Xiao-Dong Yu, Da-Jian Zhang, C. L. Liu, D. M. Tong
quant-ph