Abstract
Using photon pairs created in parametric down-conversion, we report on an experiment, which demonstrates that measurement can recover the quantum entanglement of a two-qubit system in a pure dephasing environment. The concurrence of the final state with and without measurement is compared and analyzed. Furthermore, we verify that recovered states can still violate the Bell 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 to its initial state.
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Robust bidirectional links for photonic quantum Networks, Jin-Shi Xu et al., accepted for publication in Science Advances.
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Xu, XY. (2016). Measurement-Induced Entanglement Recovery. In: Applied Research of Quantum Information Based on Linear Optics. Springer Theses. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-49804-0_2
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DOI: https://doi.org/10.1007/978-3-662-49804-0_2
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