Positioning and clock synchronization through entanglement
arXiv:quant-ph/0107140 · doi:10.1103/PhysRevA.65.022309
Abstract
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.
Revised version. 9 pages, 6 figures
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