Phys. Rev. A 65, 022309 (2002) [9 pages]Positioning and clock synchronization through entanglementReceived 27 July 2001; revised 10 September 2001; published 4 January 2002 A method is proposed to employ entangled and squeezed light for determining the position of a party and for synchronizing distant clocks. An accuracy gain over analogous protocols that employ classical resources is demonstrated and a quantum-cryptographic positioning application is given, which allows only trusted parties to learn the position of whatever must be localized. The presence of a lossy channel and imperfect photodetection is considered. The advantages in using partially entangled states is discussed. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.65.022309
DOI:
10.1103/PhysRevA.65.022309
PACS:
03.67.-a, 42.50.Dv, 03.65.-w
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