Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10481938 | Physica A: Statistical Mechanics and its Applications | 2013 | 6 Pages |
Abstract
The overlap (inner product) between the ground-state eigenvectors with proximate interaction parameters, the so-called fidelity, plays a significant role in the quantum-information theory. In this paper, the critical behavior of the fidelity susceptibility is investigated for a two-dimensional transverse-field (quantum) Ising model by means of the numerical diagonalization method. In order to treat a variety of system sizes N=12,14,â¦,32, we adopt the screw-boundary condition. Finite-size artifacts (scaling corrections) of the fidelity susceptibility appear to be suppressed, as compared to those of the Binder parameter. As a result, we estimate the fidelity susceptibility critical exponent as αF=0.715(20).
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematical Physics
Authors
Yoshihiro Nishiyama,