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Entanglement-based linear-optical qubit amplifier
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SYSNO ASEP 0424180 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Entanglement-based linear-optical qubit amplifier Author(s) Meyer-Scott, E. (CA)
Bula, M. (CZ)
Bartkiewicz, K. (CZ)
Černoch, Antonín (FZU-D) RID, ORCID
Soubusta, Jan (FZU-D) RID, ORCID
Jennewein, T. (CA)
Lemr, Karel (FZU-D) RIDSource Title Physical Review. A. - : American Physical Society - ISSN 1050-2947
Roč. 87, č. 1 (2013), "012327-1"-"012327-7"Number of pages 7 s. Language eng - English Country US - United States Keywords quantum physics ; photonics qubits ; qubit amplifier Subject RIV BH - Optics, Masers, Lasers R&D Projects GAP205/12/0382 GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000322527600003 EID SCOPUS 84881492988 DOI 10.1103/PhysRevA.88.012327 Annotation 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. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2014
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