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arXiv · 1704.01035

Optimal discrimination of single-qubit mixed states

Graeme Weir·Stephen M. Barnett·Sarah Croke
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Abstract

We consider the problem of minimum-error quantum state discrimination for single-qubit mixed states. We present a method which uses the Helstrom conditions constructively and analytically; this algebraic approach is complementary to existing geometric methods, and solves the problem for any number of arbitrary signal states with arbitrary prior probabilities.

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Graeme Weir, Stephen M. Barnett, Sarah Croke. 2017-04-04. Optimal discrimination of single-qubit mixed states. https://doi.org/10.1103/physreva.96.022312

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