Protecting entanglement from correlated amplitude damping channel using   weak measurement and quantum measurement reversal
  Based on the quantum technique of weak measurement, we propose a scheme to protect the entanglement from correlated amplitude damping decoherence. In contrast to the results of memoryless amplitude damping channel, we show that the memory effects play a significant role in the suppression of entanglement sudden death and protection of entanglement under severe decoherence. Moreover, we find that the initial entanglement could be drastically amplified by the combination of weak measurement and quantum measurement reversal even under the correlated amplitude damping channel. The underlying mechanism can be attributed to the probabilistic nature of weak measurements. 
Xing Xiao, Yao Yao, Ying-Mao Xie, Xing-Hua Wang, Yan-Ling Li
quant-ph