Effects of environmental parameters to total, quantum and classical correlations

Details Effects of environmental parameters to total, quantum and classical correlations Effects of environmental parameters to total, quantum and classical correlations

2006-12-29

arxiv.org/abs/quant-ph/0612223v1

J. Phys. A: Math. Theor. 40 12143 (2007).

Physics

Quantum Physics

6 pages, 4 figures

Scientific paper

10.1088/1751-8113/40/40/009

We quantify the total, quantum, and classical correlations with entropic measures, and quantitatively compare these correlations in a quantum system, as exemplified by a Heisenberg dimer which is subjected to the change of environmental parameters: temperature and nonuniform external field. Our results show that the quantum correlation may exceed the classical correlation at some nonzero temperatures, though the former is rather fragile than the later under thermal fluctuation. The effect of the external field to the classical correlation is quite different from the quantum correlation.

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