Revisiting the Dolinar receiver through multiple-copy state discrimination theory
Antonio Assalini, Nicola Dalla Pozza, Gianfranco L. Pierobon · Physical Review A · 2011
We consider the problem of discriminating between two quantum coherent states by interpreting a single state as being a collection of several successive copies of weaker coherent states. By means of recent results on multiple-copy state discrimination, it is possible to give a reinterpretation of the Dolinar receiver and carry out a quite-straightforward analysis of its behavior. We also propose and investigate a suboptimal detection scheme derived from the Dolinar's architecture, which is shown to slightly outperform some other near-optimal schemes available in the literature.