Complete analysis of measurement-induced entanglement localization on a three-photon system

Anno: 2010

Autori: Gavenda M., Filip R., Nagali E., Sciarrino F., De Martini F.

Affiliazione autori: Palacky Univ, Dept Opt, CZ-77146 Olomouc, Czech Republic; Sapienza Univ Roma, Dipartimento Fis, I-00185 Rome, Italy; Ist Nazl Ott Applicata, I-50125 Florence, Italy; Acad Nazl Lincei, I-00165 Rome, Italy.

Abstract: 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.

Giornale/Rivista: PHYSICAL REVIEW A

Volume: 81 (2)      Da Pagina: 22313-1  A: 22313-15

Maggiori informazioni: The research has been supported by project no. MSM 6198959213 and no. LC06007 of the Czech Ministry of Education. R. F. acknowledges Grant 202/07/J040 of GA CR and support by the Alexander von Humboldt Foundation.
Parole chiavi: Noisy Entanglement; Hidden; Teleportation; Purification; States
DOI: 10.1103/PhysRevA.81.022313

Citazioni: 3
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
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