2013年10月
Critical behavior of the fidelity susceptibility for the d=2 transverse-field Ising model
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
- 巻
- 392
- 号
- 19
- 開始ページ
- 4345
- 終了ページ
- 4350
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1016/j.physa.2013.05.024
- 出版者・発行元
- ELSEVIER SCIENCE BV
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, ... , 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 alpha(F) = 0.715(20). (C) 2013 Elsevier B.V. All rights reserved.
- リンク情報
- ID情報
-
- DOI : 10.1016/j.physa.2013.05.024
- ISSN : 0378-4371
- Web of Science ID : WOS:000322750200017