Measurement-induced quantum entanglement recovery
Abstract
By using photon pairs created in parametric down conversion, we report on an experiment, which demonstrates that measurement can recover the quantum entanglement of two qubit system in a pure dephasing environment. The concurrence of the final state with and without measurement are compared and analyzed. Furthermore, we verify that recovered states can still violate Bell's inequality, that is, to say, such recovered states exhibit nonlocality. In the context of quantum entanglement, sudden death and rebirth provide clear evidence, which verifies that entanglement dynamics of the system is sensitive not only to its environment, but also on its initial state.
Cite
@article{arxiv.1010.1983,
title = {Measurement-induced quantum entanglement recovery},
author = {Xiao-Ye Xu and Jin-Shi Xu and Chuan-Feng Li and Guang-Can Guo},
journal= {arXiv preprint arXiv:1010.1983},
year = {2010}
}
Comments
This is a new version. Some typos in the Physics Review A version have been corrected