Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2005-03-10
Phys. Rev. A 72 (2005) 022318
Physics
Condensed Matter
Statistical Mechanics
4 pages, 7 figures
Scientific paper
10.1103/PhysRevA.72.022318
We promote use of the geometric entropy formula derived by Holzhey et. al. from conformal field theory, $S_\ell\sim ({c}/{3}) \log(\sin{\pi\ell}/{N})$, to identify critical regions in zero temperature 1D quantum systems. The method is demonstrated on a class of one-dimensional XY and $XYZ$ spin-1/2 chains, where the critical regions and their correponding central charges can be reproduced with quite modest computational efforts.
Olaussen Kåre
Skrøvseth Stein Olav
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