Home | About Journal | Web Links | E-mail Alerts | RSS RSS Icon | Browse
Previous Article Next Article

Coherent-state phase concentration by quantum probabilistic amplification

Source: Phys. Rev. A 81, 022302 (2010); doi:10.1103/PhysRevA.81.022302

Published 4 February 2010

PACS
  • 03.67.Hk
    Quantum communication
  • 03.67.Dd
    Quantum cryptography and communication security
  • YEAR: 2010
PUBLICATION DATA
Publisher:
AIP is a member of CrossRef APS
Petr Marek and Radim Filip
Department of Optics, Palacký University, 17. listopadu 1192/12, CZ-771 46 Olomouc, Czech Republic
We propose a probabilistic measurement-induced amplification for coherent states. The amplification scheme uses a counterintuitive architecture: a thermal noise addition (instead of a single-photon addition) followed by a feasible multiple-photon subtraction using a realistic photon-number-resolving detector. It allows one to substantially amplify weak coherent states and simultaneously reduce their phase uncertainty, which is impossible when using a deterministic Gaussian amplifier. ©2010 The American Physical Society
History: Received 14 July 2009; published 4 February 2010
Permalink: http://link.aps.org/abstract/PRA/v81/e022302
ADVERTISEMENT