Accurate quantum state estimation via "Keeping the experimentalist honest"

Details Accurate quantum state estimation via "Keeping the experimentalist honest" Accurate quantum state estimation via "Keeping the experimentalist honest"

2006-03-14

arxiv.org/abs/quant-ph/0603116v1

Physics

Quantum Physics

5 pages

Scientific paper

In this article, we derive a unique procedure for quantum state estimation from a simple, self-evident principle: an experimentalist's estimate of the quantum state generated by an apparatus should be constrained by honesty. A skeptical observer should subject the estimate to a test that guarantees that a self-interested experimentalist will report the true state as accurately as possible. We also find a non-asymptotic, operational interpretation of the quantum relative entropy function.

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