Quantum uniqueness

Details Quantum uniqueness Quantum uniqueness

2010-03-06

arxiv.org/abs/1003.1402v1

Physics

Quantum Physics

Presented at 4th Feynman festival, June 22-26, 2009, in Olomouc, Czech Republic.

Scientific paper

In the classical world one can construct two identical systems which have identical behavior and give identical measurement results. We show this to be impossible in the quantum domain. We prove that after the same quantum measurement two different quantum systems cannot yield always identical results, provided the possible measurement results belong to a non orthogonal set. This is interpreted as quantum uniqueness - a quantum feature which has no classical analog. Its tight relation with objective randomness of quantum measurements is discussed.

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