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理论物理通讯：英文版

Simultaneous Space and Time Synchronization Using Shared Entangled Qubits

Liu, Xiao-Shu, Long, Gui-Lu, Tong, Dian-Min

Published Jan 1, 2003• 2 citations
OpenAlex

Abstract

This paper generalizes the quantum clock synchronization protocol of Josza, et al., [Richard Jozsa, et al.,Phys. Rev. Lett. 85 (2000) 2010] to synchronize space and time simultaneously.

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A reply to "Quantum Clock Synchronization"

Eric A. Burt, Chris Ekstrom, Swanson, Tom

Recently a protocol for Quantum Clock Synchronization (QCS) of remote clocks using quantum entanglement was proposed by Jozsa et al. This method has the goal of eliminating the random noise present in classical synchronization techniques. However, as stated QCS depends on the two members of each entangled pair undergoing the same unitary evolution even while being transported to different locations. This is essentially equivalent to a perfect Eddington Slow Clock Transfer protocol and thus, not an improvement over classical techniques. We will discuss this and suggest ways in which QCS may still be used.

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Comment on “Quantum Clock Synchronization Based on Shared Prior Entanglement”

Eric A. Burt, Christopher R. Ekstrom, Thomas B. Swanson

A Comment on the Letter by Richard Jozsȧ, et al. Phys. Rev. Lett. 85, 2010 (2000). The authors of the Letter offer a Reply.Received 6 September 2000DOI:https://doi.org/10.1103/PhysRevLett.87.129801©2001 American Physical Society

Physical Review Letters•Aug 29, 2001•21 citations
Recently a protocol for Quantum Clock Synchronization (QCS) of remote clocks using quantum entanglement was proposed by Jozsa et al. This method has the goal of eliminating the random noise present in classical synchronization techniques. However, as stated QCS depends on the two members of each entangled pair undergoing the same unitary evolution even while being transported to different locations. This is essentially equivalent to a perfect Eddington Slow Clock Transfer protocol and thus, not an improvement over classical techniques. We will discuss this and suggest ways in which QCS may still be used.