Fluctuation induced non-canonical BCS states: a mechanism for pseudogap

Details Fluctuation induced non-canonical BCS states: a mechanism for pseudogap Fluctuation induced non-canonical BCS states: a mechanism for pseudogap

2010-12-31

arxiv.org/abs/1101.0247v2

Physics

Condensed Matter

Superconductivity

3 pages, no figures

Scientific paper

We pose the question of what effect the statistical fluctuation causes if it induces a non-unitary evolution. We apply this idea to the BCS model and study fluctuation around the mean-field average. We find that, dynamics of the thermalization influences the equilibrium besides the non-unitary evolution, and the resulting equilibrium state is no longer the canonical one. The pseudogap phenomenon can exist in this model.

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