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Ashida, Y; Shi, T1; Banuls, MC; Cirac, JI; Demler, E3
Solving Quantum Impurity Problems in and out of Equilibrium with the Variational Approach
发表期刊PHYSICAL REVIEW LETTERS
语种英语
关键词DILUTE MAGNETIC ALLOYS MANY-BODY SYSTEM KONDO PROBLEM RENORMALIZATION-GROUP FERMION SYSTEMS STATES MODEL LIMIT DOT RESONANCE
摘要A versatile and efficient variational approach is developed to solve in-and out-of-equilibrium problems of generic quantum spin-impurity systems. Employing the discrete symmetry hidden in spin-impurity models, we present a new canonical transformation that completely decouples the impurity and bath degrees of freedom. Combining it with Gaussian states, we present a family of many-body states to efficiently encode nontrivial impurity-bath correlations. We demonstrate its successful application to the anisotropic and two-lead Kondo models by studying their spatiotemporal dynamics and universal behavior in the correlations, relaxation times, and the differential conductance. We compare them to previous analytical and numerical results. In particular, we apply our method to study new types of nonequilibrium phenomena that have not been studied by other methods, such as long-time crossover in the ferromagnetic easy-plane Kondo model. The present approach will be applicable to a variety of unsolved problems in solid-state and ultracold-atomic systems.
2018
ISSN0031-9007
卷号121期号:2页码:26805
学科领域Physics
学科门类Physics, Multidisciplinary
DOI10.1103/PhysRevLett.121.026805
收录类别SCIE
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/22863
专题理论物理所科研产出_SCI论文
作者单位1.Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China
3.Max Planck Inst Quantum Opt, Hans Kopfermann Str 1, D-85748 Garching, Germany
4.Harvard Univ, Dept Phys, Cambridge, MA 02138 USA
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GB/T 7714
Ashida, Y,Shi, T,Banuls, MC,et al. Solving Quantum Impurity Problems in and out of Equilibrium with the Variational Approach[J]. PHYSICAL REVIEW LETTERS,2018,121(2):26805.
APA Ashida, Y,Shi, T,Banuls, MC,Cirac, JI,&Demler, E.(2018).Solving Quantum Impurity Problems in and out of Equilibrium with the Variational Approach.PHYSICAL REVIEW LETTERS,121(2),26805.
MLA Ashida, Y,et al."Solving Quantum Impurity Problems in and out of Equilibrium with the Variational Approach".PHYSICAL REVIEW LETTERS 121.2(2018):26805.
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