Local distinguishability of orthogonal quantum states in a 2a? - 2a? - 2 system

摘要

In this Brief Report, we study the distinguishability of three-qubit quantum states by local operations and classical communication. We first determine α(S5)=4 and also show a necessary condition for local distinguishability of three-qubit quantum states. Applying the characterization of orthogonal product states, we obtain two methods to discriminate mixed states with some constraints.