TY - JOUR
T1 - Demonstration of coherent-state discrimination using a displacement- controlled photon-number-resolving detector
AU - Wittmann, Christoffer
AU - Andersen, Ulrik L.
AU - Takeoka, Masahiro
AU - Sych, Denis
AU - Leuchs, Gerd
PY - 2010/3/12
Y1 - 2010/3/12
N2 - We experimentally demonstrate a new measurement scheme for the discrimination of two coherent states. The measurement scheme is based on a displacement operation followed by a photon-number-resolving detector, and we show that it outperforms the standard homodyne detector which we, in addition, prove to be optimal within all Gaussian operations including conditional dynamics. We also show that the non-Gaussian detector is superior to the homodyne detector in a continuous variable quantum key distribution scheme.
AB - We experimentally demonstrate a new measurement scheme for the discrimination of two coherent states. The measurement scheme is based on a displacement operation followed by a photon-number-resolving detector, and we show that it outperforms the standard homodyne detector which we, in addition, prove to be optimal within all Gaussian operations including conditional dynamics. We also show that the non-Gaussian detector is superior to the homodyne detector in a continuous variable quantum key distribution scheme.
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U2 - 10.1103/PhysRevLett.104.100505
DO - 10.1103/PhysRevLett.104.100505
M3 - Article
AN - SCOPUS:77949413420
SN - 0031-9007
VL - 104
JO - Physical Review Letters
JF - Physical Review Letters
IS - 10
M1 - 100505
ER -