Entanglement concentration by ordinary linear optical devices without postselection

Journal Article · Mon Dec 01 04:00:00 EST 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.68.060302· OSTI ID:20640435

Xiangbin, Wang; Heng, Fan ^[1]

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1. Imai Quantum Computation and Information Project, ERATO, Japan Science and Technology Corporation, Daini Hongo White Building 201, 5-28-3, Hongo, Bunkyo, Tokyo 113-0033 (Japan)

Recently, entanglement concentrations have been experimentaly demonstrated by postselection [T. Yamamoto et al., Nature (London) 421, 343 (2003), and Z. Zhao et al., Phys. Rev. Lett. 90, 207901 (2003)], i.e., to each individual outcome state, one has to destroy it to know whether it has been purified. Here we give proposal for entanglement concentration without any postselection by using only practically existing linear optical devices. In particular, a sophisticated photon detector to distinguish one photon or two photons is not required.

• OSTI ID: 20640435
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 68; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CORRELATIONS
DATA TRANSMISSION
ENERGY LEVELS
OPTICS
PHOTODETECTORS
PHOTONS
QUANTUM MECHANICS