One-way Quantum Deficit and Decoherence for Two-qubit $X$ States
  We study one-way quantum deficit of two-qubit $X$ states systematically from analytical derivations. An effective approach to compute one-way quantum deficit of two-qubit $X$ states has been provided. Analytical results are presented as for detailed examples. Moreover, we demonstrate the decoherence of one-way quantum deficit under phase damping channel. 
Biao-Liang Ye, Yao-Kun Wang, and Shao-Ming Fei
quant-ph