Back to Publications List       Positioning and clock synchronization through entanglement V. Giovannetti, S. Lloyd, and L. Maccone Phys. Rev. A, quant-ph/0107140 Abstract A method is proposed to employ entangled and squeezed light for determining the position of a party. An accuracy gain over analogous protocols that employ classical light of equal spectrum is demonstrated. A similar procedure may be employed to enhance the accuracy when synchronizing clocks of distant parties. It is shown how the accuracy increase scales with the system resources and how it compares with analogous, but unentangled, protocols. The presence of a lossy channel and imperfect photodetection is considered. The advantages in using partially entangled states is discussed. A quantum cryptographic positioning scheme is given, which allows only trusted parties to learn the position of whatever must be localized.         Home | About the Program | Our Research | Publications | People Related MURIs | Contact © Massachusetts Institute of Technology