TY - JOUR
T1 - Demonstrating superior discrimination of locally prepared states using nonlocal measurements
AU - Pryde, G. J.
AU - O'Brien, J. L.
AU - White, A. G.
AU - Bartlett, Stephen D.
PY - 2005/6/10
Y1 - 2005/6/10
N2 - We experimentally demonstrate the superior discrimination of separated, unentangled two-qubit correlated states using nonlocal measurements, when compared with measurements based on local operations and classical communications. When predicted theoretically, this phenomenon was dubbed "quantum nonlocality without entanglement." We characterize the performance of the nonlocal, or joint, measurement with a payoff function, for which we measure 0.72±0.02, compared with the maximum locally achievable value of 2/3 and the overall optimal value of 0.75.
AB - We experimentally demonstrate the superior discrimination of separated, unentangled two-qubit correlated states using nonlocal measurements, when compared with measurements based on local operations and classical communications. When predicted theoretically, this phenomenon was dubbed "quantum nonlocality without entanglement." We characterize the performance of the nonlocal, or joint, measurement with a payoff function, for which we measure 0.72±0.02, compared with the maximum locally achievable value of 2/3 and the overall optimal value of 0.75.
UR - http://www.scopus.com/inward/record.url?scp=27744574976&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.94.220406
DO - 10.1103/PhysRevLett.94.220406
M3 - Article
AN - SCOPUS:27744574976
SN - 0031-9007
VL - 94
JO - Physical Review Letters
JF - Physical Review Letters
IS - 22
M1 - 220406
ER -