Protecting entanglement from decoherence using weak measurement and quantum measurement reversal
Yong‐Su Kim, Jong Chan Lee, Osung Kwon, Yoon-Ho Kim · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2013
Decoherence, which causes degradation of entanglement and in some cases entanglement sudden death, is a critical issue faced in quantum information. Protecting entanglement from decoherence, therefore, is essential in practical realization of quantum computing and quantum communication protocols. In this paper, we demonstrate a novel method to protect entanglement from amplitude damping decoherence via weak measurement and quantum measurement reversal. It is shown that even entanglement sudden death can be circumvented.