Year: 2011
Type: article
Abstract: A multiparty 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 the usage of Z (Symmetric Dicke) states, a generalization of $W$ states, results in improved accuracy, having a maximum when $\ensuremath{\lfloor}n/2\ensuremath{\rfloor}$ of its members have their qubits with a $|1\ensuremath{\rangle}$ eigenstate.
Source: Physical Review A
Authors: Radel Ben-Av, Iaakov Exman
Institution: Azrieli College of Engineering Jerusalem
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2593477750