Optimality of minimum-error discrimination by the no-signalling condition

Details Optimality of minimum-error discrimination by the no-signalling condition Optimality of minimum-error discrimination by the no-signalling condition

2007-11-05

arxiv.org/abs/0711.0664v2

Phys. Rev. A 78, 022335 (2008)

Physics

Quantum Physics

4 pages, 1 figure

Scientific paper

10.1103/PhysRevA.78.022335

In this work we relate the well-known no-go theorem that two non-orthogonal
(mixed) quantum states cannot be perfectly discriminated, to the general
principle in physics, the no-signalling condition. In fact, we derive the
minimum error in discrimination between two quantum states, using the
no-signalling condition.

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