Session B33: Cooperative Phenomena Theory
11:15 AM–2:15 PM, Monday, March 15, 2010
Room: E143
Sponsoring Unit:
GMAG
Chair: Chia-Ren Hu, Texas A&M University
Abstract ID: BAPS.2010.MAR.B33.3
Abstract: B33.00003 : Quantum Fidelity and Fidelity Susceptibility of the Spatially Anisotropic Triangular Heisenberg Model
11:39 AM–11:51 AM
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Abstract 
Authors:
Mischa Thesberg
(McMaster University)
Erik S. Sorensen
(McMaster University)
The phase diagram of the spin-1/2 antiferromagnetic Heisenberg model on a triangular lattice is studied. Anisotropy is introduced through the diagonal exchange constant J' differing from the intrachain exchange constant J. Previous work on this model has suggested a competition between two (three if second-nearest neighbour interactions are considered) ground state orderings. We use numerical exact diagonalization techniques to investigate the proposed phases by studying the quantum fidelity and fidelity susceptibility as a function of the anisotropy.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.B33.3