Ergodicity from Nonergodicity in Quantum Correlations of Low-dimensional Spin Systems

Details Ergodicity from Nonergodicity in Quantum Correlations of Low-dimensional Spin Systems Ergodicity from Nonergodicity in Quantum Correlations of Low-dimensional Spin Systems

2011-03-20

arxiv.org/abs/1103.3836v1

Physics

Quantum Physics

8 pages, 6 figures, RevTeX 4.1

Scientific paper

Correlations between the parts of a many-body system, and its time dynamics, lie at the heart of sciences, and they can be classical as well as quantum. Quantum correlations are traditionally viewed as constituted out of classical correlations and magnetizations. While that of course remains so, we show that quantum correlations can have statistical mechanical properties like ergodicity, which is not inherited from the corresponding classical correlations and magnetizations, for the transverse anisotropic quantum XY model in one-, two-, and quasi two-dimension, for suitably chosen transverse fields and temperatures. The results have the potential for applications in decoherence effects in realizable quantum computers.

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