TY - JOUR
T1 - Optimal Scheme for Estimating a Pure Qubit State via Local Measurements
AU - Bagan, E.
AU - Baig, M.
AU - Muñoz-Tapia, R.
PY - 2002/1/1
Y1 - 2002/1/1
N2 - We present the optimal scheme for estimating a pure qubit state by means of local measurements on [Formula presented] identical copies. We give explicit examples for low [Formula presented]. For large [Formula presented], we show that the fidelity saturates the collective measurement bound up to order [Formula presented]. When the signal state lays on a meridian of the Bloch sphere, we show that this can be achieved without classical communication. © 2002 The American Physical Society.
AB - We present the optimal scheme for estimating a pure qubit state by means of local measurements on [Formula presented] identical copies. We give explicit examples for low [Formula presented]. For large [Formula presented], we show that the fidelity saturates the collective measurement bound up to order [Formula presented]. When the signal state lays on a meridian of the Bloch sphere, we show that this can be achieved without classical communication. © 2002 The American Physical Society.
UR - https://www.scopus.com/pages/publications/0037203440
U2 - 10.1103/PhysRevLett.89.277904
DO - 10.1103/PhysRevLett.89.277904
M3 - Article
SN - 0031-9007
VL - 89
JO - Physical Review Letters
JF - Physical Review Letters
ER -