|
|||||
|
|
Equiprobable unambiguous discrimination of quantum states by symmetric orthogonalisation |
|
| Authors: | D.B. Horoshko M.M. Eskandari S.Ya. Kilin |
| Affiliation: | 1. Univ. Lille, CNRS, UMR 8523 - PhLAM - Physique des Lasers Atomes et Molécules, F-59000 Lille, France;2. B.I. Stepanov Institute of Physics, NASB, Nezavisimosti Ave. 68, Minsk 220072, Belarus |
| Abstract: | We show that the maximal probability of equiprobable unambiguous discrimination of a set of pure quantum states is given by the minimal eigenvalue of the Gram matrix of this set. We illustrate this result with several examples important for the protocols of quantum key distribution realized with weak coherent states of light. |
| Keywords: | Unambiguous state discrimination Quantum key distribution Quantum measurement theory Coherent states |
| 本文献已被 ScienceDirect 等数据库收录！ | |