Demonstration of near-optimal discrimination of optical coherent states.
The optimal discrimination of nonorthogonal quantum states with minimum error probability is a fundamental task in quantum measurement theory as well as an important primitive in optical communication. In this work, we propose and experimentally realize a new and simple quantum measurement strategy capable of discriminating two coherent states with smaller error probabilities than can be obtained using the standard measurement devices: the Kennedy receiver and the homodyne receiver.
Wittmann
Christoffer
C
Institut für Optik, Information und Photonik, Max-Planck-Forschungsgruppe, Universität Erlangen-Nürnberg, Günther-Scharowsky-Strasse 1, 91058, Erlangen, Germany.
Takeoka
Masahiro
M
Cassemiro
Katiúscia N
KN
Sasaki
Masahide
M
Leuchs
Gerd
G
Andersen
Ulrik L
UL