Quantum-memory-assisted entropic uncertainty principle under noise
Quantum Physics
2012-07-26 v1
Abstract
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.
Cite
@article{arxiv.1203.3331,
title = {Quantum-memory-assisted entropic uncertainty principle under noise},
author = {Z. Y. Xu and W. L. Yang and M. Feng},
journal= {arXiv preprint arXiv:1203.3331},
year = {2012}
}
Comments
6 pages, 4 figures including Supplemental Material