Protecting quantum states from decoherence of finite temperature using weak measurement
Shuchao Wang, Zong‐Wen Yu, Wenjie Zou, Xiang‐Bin Wang · Physical Review A · 2014
Exposed in the nonzero temperature environment, a quantum system can both lose and gain excitations by interacting with the environment. In this work, we show how to optimally protect quantum states and quantum entanglement in such a situation based on measurement reversal from weak measurement. In particular, we present explicit formulas of protection. We find that this scheme can circumvent the entanglement sudden death in certain conditions.