BKT transition and level spectroscopy
arXiv:cond-mat/0201072
Abstract
Berezinskii-Kosterlitz-Thouless (BKT) transition is one of the instability mechanisms for the Tomonaga-Luttinger liquid. But in the BKT transition, there are logarithmic-correction problems, which make it very difficult to treat BKT transitions numerically. We propose a method, ``level spectroscopy'', to overcome such difficulties, based on the renormalization group analysis and the symmetry consideration.
14 pages, 2 tables, 6 figures(embedded), Proceedings for French Japanese Symposium at Fukuoka, Japan (2001 NOV)