Optimal State Discrimination Using Particle Statistics
ArXiv quant-ph/0309090 (2003)
Authors:
S Bose, A Ekert, Y Omar, N Paunkovic, V Vedral
Abstract:
We present an application of particle statistics to the problem of optimal
ambiguous discrimination of quantum states. The states to be discriminated are
encoded in the internal degrees of freedom of identical particles, and we use
the bunching and antibunching of the external degrees of freedom to
discriminate between various internal states. We show that we can achieve the
optimal single-shot discrimination probability using only the effects of
particle statistics. We discuss interesting applications of our method to
detecting entanglement and purifying mixed states. Our scheme can easily be
implemented with the current technology.
