Entropic uncertainty relations for incomplete sets of mutually unbiased observables

Details Entropic uncertainty relations for incomplete sets of mutually unbiased observables Entropic uncertainty relations for incomplete sets of mutually unbiased observables

2004-12-10

arxiv.org/abs/quant-ph/0412083v1

Physics

Quantum Physics

4 pages, 1 figure

Scientific paper

Entropic uncertainty relations, based on sums of entropies of probability distributions arising from different measurements on a given pure state, can be seen as a generalization of the Heisenberg uncertainty relation that is in many cases a more useful way to quantify incompatibility between observables. Of particular interest are relationships between `mutually unbiased' observables, which are maximally incompatible. Lower bounds on the sum of entropies for sets of two such observables, and for complete sets of observables within a space of given dimension, have been found. This paper explores relations in the intermediate regime of large, but far from complete, sets of unbiased observables.

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