Operationally Invariant Information in Quantum Measurements

Details Operationally Invariant Information in Quantum Measurements Operationally Invariant Information in Quantum Measurements

2000-05-19

arxiv.org/abs/quant-ph/0005084v1

Phys. Rev. Lett. 83 (1999) 3354-3357

Physics

Quantum Physics

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.83.3354

A new measure of information in quantum mechanics is proposed which takes into account that for quantum systems the only feature known before an experiment is performed are the probabilities for various events to occur. The sum of the individual measures of information for mutually complementary observations is invariant under the choice of the particular set of complementary observations and conserved if there is no information exchange with an environment. That operational quantum information invariant results in N bits of information for a system consisting of N qubits.

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