Quantum-memory-assisted entropic uncertainty principle under noise

Details Quantum-memory-assisted entropic uncertainty principle under noise Quantum-memory-assisted entropic uncertainty principle under noise

2012-03-15

arxiv.org/abs/1203.3331v1

Physics

Quantum Physics

6 pages, 4 figures including Supplemental Material

Scientific paper

The measurement outcomes of two incompatible observables on a particle can be precisely predicted when it is maximally entangled with a quantum memory, as quantified recently [Nature Phys. 6, 659 (2010)]. We explore the behavior of the uncertainty relation under the influence of local unital and nonunital noisy channels. While the unital noises only increase the amount of uncertainty, the amplitude-damping nonunital noises may amazingly reduce the amount of uncertainty in the long-time limit. This counterintuitive phenomenon could be justified by different competitive mechanisms between quantum correlations and the minimal missing information after local measurement.

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