A novel quantum transition in a fully frustrated transverse Ising antiferromagnet
スポンサーリンク
概要
- 論文の詳細を見る
We consider a long-range Ising antiferromagnet (LRIAF) put in a transverse field. Applying quantum Monte Carlo method, we study the variation of order parameter (spin correlation in Trotter time direction), susceptibility and average energy of the system for various values of the transverse field at different temperatures. The antiferromagnetic order is seen to get immediately broken as soon as the thermal or quantum fluctuations are added. We also discuss the phase diagram for the Sherrington-Kirkpatrick (SK) model with the same LRIAF bias, also in presence of a transverse field. We find that while the antiferromagnetic order is immediately broken as one adds an infinitesimal transverse field or thermal fluctuation to the system, an infinitesimal SK spin glass disorder is enough to induce a stable glass order in the antiferromagnet. This glass order eventually gets destroyed as the thermal or quantum fluctuations increased beyond their threshold values and the transition to para phase occurs. Indications of this novel phase transition are discussed. Because of the presence of full frustration, this surrogate property of the LRIAF for incubation of stable spin glass phase in it (induced by addition of a small disorder) should enable eventually the study of classical and quantum spin glass phases by using some perturbation theory with respect to the disorder.International Workshop on Statistical-Mechanical Informatics 2008 (IW-SMI 2008), 14–17 September 2008, Sendai International Center, Aoba-ku, Sendai, Japan
- 2009-01-07
論文 | ランダム
- I-36. 乳頭部癌手術例の検討(第21回日本胆道外科研究会)
- 示-262 ss 胆嚢癌における超音波内視鏡検査の評価と迅速病理組織診を反映した術式の選択(第40回日本消化器外科学会総会)
- 544 膵襄胞性腫瘍の診断と治療(第39回日本消化器外科学会総会)
- 31. 胆嚢癌の手術成績の検討 : 長期生存を得るために(第20回日本胆道外科研究会)
- 175 Borrmann 4 型胃癌に対する術前昇圧化学療法の検討(第37回日本消化器外科学会総会)