Quantum enhanced positioning and clock synchronization

Details Quantum enhanced positioning and clock synchronization Quantum enhanced positioning and clock synchronization

2001-03-02

arxiv.org/abs/quant-ph/0103006v3

Nature 412, 417 (2001)

Physics

Quantum Physics

4 pages, 2 figures. Accepted for publication by Nature

Scientific paper

10.1038/35086525

A wide variety of positioning and ranging procedures are based on repeatedly sending electromagnetic pulses through space and measuring their time of arrival. This paper shows that quantum entanglement and squeezing can be employed to overcome the classical power/bandwidth limits on these procedures, enhancing their accuracy. Frequency entangled pulses could be used to construct quantum positioning systems (QPS), to perform clock synchronization, or to do ranging (quantum radar): all of these techniques exhibit a similar enhancement compared with analogous protocols that use classical light. Quantum entanglement and squeezing have been exploited in the context of interferometry, frequency measurements, lithography, and algorithms. Here, the problem of positioning a party (say Alice) with respect to a fixed array of reference points will be analyzed.

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