Optimized Multi-Party Quantum Clock Synchronization
arXiv:1105.0186 · doi:10.1103/PhysRevA.84.014301
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 (16)
- Three qubits can be entangled in two inequivalent ways
- Quantum enhanced positioning and clock synchronization
- Quantum Clock Synchronization Based on Shared Prior Entanglement
- Optimal Quantum Clocks
- Distant Clock Synchronization Using Entangled Photon Pairs
- Quantum algorithm for distributed clock synchronization
- Quantum methods for clock synchronization: Beating the standard quantum limit without entanglement
- A Lorentz-invariant look at quantum clock synchronization protocols based on distributed entanglement
- Quantum Clock Synchronization: a Multi-Party Protocol
- Clock Synchronization based on Second-Order Quantum Coherence of Entangled Photons
- Random multiparty entanglement distillation
- On Decoherence in Quantum Clock Synchronization
- Quantum clock synchronization and quantum error correction
- Synchronizing quantum clocks with classical one-way communication: Bounds on the generated entropy
- A reply to "Quantum Clock Synchronization"
- Quantum Clock Synchronization with one qubit
Cited by in corpus (13)
- Remote quantum clock synchronization without synchronized clocks
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- Quantum NETwork: from theory to practice
- Clock synchronization using maximal multipartite entanglement
- Criterion on remote clocks synchronization within a Heisenberg scaling accuracy
- Operation triggered quantum clock synchronization
- Interaction-free evolving states of a bipartite system
- Estimating the Unruh effect via entangled many-body probes
- 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