Bounday Condition histograms for modulated phases

Details Bounday Condition histograms for modulated phases Bounday Condition histograms for modulated phases

1998-03-19

arxiv.org/abs/cond-mat/9803237v1

Eur. Phys. J. B1, 197 (1998)

Physics

Condensed Matter

Statistical Mechanics

31 pages, 8 figures

Scientific paper

10.1007/s100510050171

Boundary conditions strongly affect the results of numerical computations for finite size inhomogeneous or incommensurate structures. We present a method which allows to deal with this problem, both for ground state and for critical properties: it combines fluctuating boundary conditions and specific histogram techniques. Our approach concerns classical systems possessing a continuous symmetry as well as quantum systems. In particular, current-current correlation functions, which probe large scale coherence of the states, can be accurately evaluated. We illustrate our method on a frustrated two dimensional XY model.

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