Influence of measurement attributes on quantum correlations of the qubit pair with a common reservoir

Details Influence of measurement attributes on quantum correlations of the qubit pair with a common reservoir Influence of measurement attributes on quantum correlations of the qubit pair with a common reservoir

2011-08-17

arxiv.org/abs/1108.3397v2

Physics

Quantum Physics

8 pages, 2 figures, typos

Scientific paper

The effect of non-ideal or imperfect measuring attributes such as the quantum level of precision and finite duration on the classical correlation and quantum discord is analysed for a pair of qubits immersed in a common reservoir. We show that the quantum discord is enhanced as the precision of the measuring instrument is increased, and both the classical correlation and the quantum discord undergo noticeable changes during the duration when measurements are performed on a neighboring partition. These results are in stark contrast to those obtained using idealized measurement procedures, and imply the emergence of classicality in quantum systems with increasing imperfections in measurement procedures.

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