2025-10-24 東京科学大学（公開日）
図1. スピンがランダムに凍結したスピングラス
＜関連情報＞
- https://www.isct.ac.jp/ja/news/cg2mlexna9se
- https://www.isct.ac.jp/plugins/cms/component_download_file.php?type=2&pageId=&contentsId=1&contentsDataId=2507&prevId=&key=e83d10a0715bd3ef362058118c166351.pdf
- https://journals.aps.org/pre/abstract/10.1103/qp1w-qcbs
スピングラスにおけるリエントラント転移の論理的帰結としての温度カオス Temperature chaos as a logical consequence of the reentrant transition in spin glasses
Hidetoshi Nishimori, Masayuki Ohzeki, and Manaka Okuyama
Physical Review E Published: 22 October, 2025
DOI: https://doi.org/10.1103/qp1w-qcbs
Abstract
Temperature chaos is a striking phenomenon in spin glasses, where even slight changes in temperature lead to a complete reconfiguration of the spin state. Another intriguing effect is the reentrant transition, in which lowering the temperature drives the system from a ferromagnetic phase into a less ordered spin-glass or paramagnetic phase. In the present paper, we reveal an unexpected connection between these seemingly unrelated phenomena in the finite-dimensional Edwards-Anderson model of spin glasses by introducing a generalized formulation that incorporates correlations among disorder variables. Assuming the existence of a spin-glass phase at finite temperature, we establish that temperature chaos arises as a logical consequence of reentrance in the Edwards-Anderson model. Our findings uncover a previously hidden mathematical structure relating reentrance and temperature chaos, offering a new perspective on the physics of spin glasses beyond the mean-field theory.
