Počet záznamů: 1  

Entanglement-based linear-optical qubit amplifier

  1. 1. 0424180 - FZU-D 2014 RIV US eng J - Článek v odborném periodiku
    Meyer-Scott, E. - Bula, M. - Bartkiewicz, K. - Černoch, Antonín - Soubusta, Jan - Jennewein, T. - Lemr, Karel
    Entanglement-based linear-optical qubit amplifier.
    Physical Review. A. Roč. 87, č. 1 (2013), "012327-1"-"012327-7". ISSN 1050-2947
    Grant CEP: GA ČR GAP205/12/0382
    Institucionální podpora: RVO:68378271
    Klíčová slova: quantum physics * photonics qubits * qubit amplifier
    Kód oboru RIV: BH - Optika, masery a lasery
    Impakt faktor: 2.991, rok: 2013

    We propose a linear-optical scheme for an efficient amplification of a photonic qubit based on interaction of the signal mode with a pair of entangled ancillae. In contrast to a previous proposal for qubit amplifier by Gisin et al. [Phys Rev. Lett. 105, 070501 (2010)], the success probability of our device does not decrease asymptotically to zero with increasing gain. Moreover, we show how the device can be used to restore entanglement deteriorated by transmission over a lossy channel and calculate the secure key rate for device-independent quantum key distribution.
    Trvalý link: http://hdl.handle.net/11104/0230199