Recovering quantum correlations from amplitude damping decoherence by weak measurement reversal
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We consider a weak measurement reversal proposal to recover quantum correlations of two-qubit system under local amplitude damping channels. With weak measurement reversal, we show that quantum correlations do not vanish but preserve a finite value in the limit of the noise strength \(p\rightarrow 1\), which can be attributed to the probabilistic nature of this method. The experimental feasibility of this approach is also discussed in pure optical systems.
KeywordsQuantum correlations Amplitude damping decoherence Weak measurement reversal
We thank Z.Y. Xu for his warmhearted help. This work is supported by the Special Funds of the National Natural Science Foundation of China under Grant Nos. 11247006 and 11247207, and by Scientic Research Foundation of Jiangxi Provincial Education Department under Grants No. GJJ12355 and by Natural Science Foundation of Jiangxi under Grants No. 20122BAB212004.
- 16.The weak measurements involved in our discussions are POVM which are different with the post-selected weak measurement proposed by Aharonov et al. in Phys. Rev. Lett. 60, 1351 (1988)Google Scholar