Journal
PHYSICAL REVIEW A
Volume 87, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.87.022314
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Funding
- NSFC [11205121, 10974247, 11175248]
- 973 Program [2010CB922904]
- NSF of Shaanxi Province [2010JM1011]
- Scientific Research Program of the Education Department of the Shaanxi Provincial Government [12JK0986]
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With the aid of a quantum memory, the uncertainty about the measurement outcomes of two incompatible observables of a quantum system can be reduced. We investigate this measurement uncertainty bound by considering an additional quantum system connected with both the quantum memory and the measured quantum system. We find that the reduction of the uncertainty bound induced by a quantum memory, on the other hand, implies it is increasing for a third participant. We also show that the properties of the uncertainty bound can be viewed from perspectives of both quantum and classical correlations, in particular, that the behavior of the uncertainty bound is a result of competitions of various correlations between different parties. DOI: 10.1103/PhysRevA.87.022314
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