TY - JOUR
T1 - Multiple-copy two-state discrimination with individual measurements
AU - Acín, A.
AU - Bagan, E.
AU - Baig, M.
AU - Masanes, Ll
AU - Muñoz-Tapia, R.
PY - 2005/3/1
Y1 - 2005/3/1
N2 - We address the problem of nonorthogonal two-state discrimination when multiple copies of the unknown state are available. We give the optimal strategy when only fixed individual measurements are allowed and show that its error probability saturates the collective (lower) bound asymptotically. We also give the optimal strategy when adaptivity of individual von Neumann measurements is allowed (which requires classical communication) and show that the corresponding error probability is exactly equal to the collective one for any number of copies. We show that this strategy can be regarded as Bayesian updating. © 2005 The American Physical Society.
AB - We address the problem of nonorthogonal two-state discrimination when multiple copies of the unknown state are available. We give the optimal strategy when only fixed individual measurements are allowed and show that its error probability saturates the collective (lower) bound asymptotically. We also give the optimal strategy when adaptivity of individual von Neumann measurements is allowed (which requires classical communication) and show that the corresponding error probability is exactly equal to the collective one for any number of copies. We show that this strategy can be regarded as Bayesian updating. © 2005 The American Physical Society.
UR - https://www.scopus.com/pages/publications/18544377020
U2 - 10.1103/PhysRevA.71.032338
DO - 10.1103/PhysRevA.71.032338
M3 - Article
SN - 1050-2947
VL - 71
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
M1 - 032338
ER -