Optimized Multi-Party Quantum Clock Synchronization

Abstract

A multi-party protocol for distributed quantum clock synchronization has been claimed to provide universal limits on the clock accuracy, viz. that accuracy monotonically decreases with the number n of party members. But, this is only true for synchronization when one limits oneself to W-states. This work shows that usage of Zen-states, a generalization of W-states, results in improved accuracy, having a maximum when \lfloor n/2 \rfloor of its members have their qubits with a |1> value.

References in corpus (2)

• On Decoherence in Quantum Clock Synchronization
• Synchronizing quantum clocks with classical one-way communication: Bounds on the generated entropy

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• Synchronization and estimation of gravity-induced time difference for quantum clocks
• Dike states in multiple quantum dots
• Synchronize accelerated clock in a multipartite relativistic quantum system
• Z-States Algebra for a Tunable Multi-Party Entanglement-Distillation Protocol