Complete analysis of measurement-induced entanglement localization on a three-photon system
- Department of Optics, Palacky University, 17. listopadu 12, CZ-77146 Olomouc (Czech Republic)
- Dipartimento di Fisica, Sapienza Universita di Roma, piazzale Aldo Moro 5, I-00185 Roma (Italy)
We discuss both theoretically and experimentally elementary two-photon polarization entanglement localization after break of entanglement caused by linear coupling of environmental photon with one of the system photons. The localization of entanglement is based on simple polarization measurement of the surrounding photon after the coupling. We demonstrate that nonzero entanglement can be localized back irrespectively to the distinguishability of coupled photons. Further, it can be increased by local single-copy polarization filters up to an amount violating Bell inequalities. The present technique allows restoration of entanglement in those cases, when the entanglement distillation produces no entanglement from the coupling.
- OSTI ID:
- 21408204
- Journal Information:
- Physical Review. A, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevA.81.022313; (c) 2010 The American Physical Society; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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