Consistent Scaling Exponents at the Deconfined Quantum-Critical Point

作     者：Anders W.Sandvik Bowen Zhao Anders W.Sandvik;赵博文

作者机构：Department of PhysicsBoston UniversityBostonMassachusetts 02215USA Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2020年第37卷第5期

页      面：93-97页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：National Science Foundation(USA)under Grant No.DMR-1710170 Simons Foundation under a Simons Investigator Award 

主　　题：transition. confined scaling 

摘      要：We report a quantum Monte Carlo study of the phase transition between antiferromagnetic and valence-bond solid ground states in the square-lattice S=1/2 J-Q *** critical correlation function of the Q terms gives a scaling dimension corresponding to the value v=0.455±0.002 of the correlation-length *** value agrees with previous(less precise)results from conventional methods,e.g.,finite-size scaling of the nearcritical order *** also study the Q-derivatives of the Binder cumulants of the order parameters for L2 lattices with L up to *** slope grows as L1/v with a value of v consistent with the scaling dimension of the Q *** are no indications of runaway flow to a first-order phase *** mutually consistent estimates of v provide compelling support for a continuous deconfined quantum-critical point.