Variational Approach for Many-Body Systems at Finite Temperature | |
Shi, Tao1; Demler, Eugene2; Cirac, J. Ignacio | |
刊名 | PHYSICAL REVIEW LETTERS |
2020 | |
卷号 | 125期号:18页码:180602 |
关键词 | CHARGE-DENSITY-WAVE HOLSTEIN MODEL |
ISSN号 | 0031-9007 |
DOI | 10.1103/PhysRevLett.125.180602 |
英文摘要 | We introduce an equation for density matrices that ensures a monotonic decrease of the free energy and reaches a fixed point at the Gibbs thermal. We build a variational approach for many-body systems that can be applied to a broad class of states, including all bosonic and fermionic Gaussian, as well as their generalizations obtained by unitary transformations, such as polaron transformations in electron-phonon systems. We apply it to the Holstein model on 20 x 20 and 50 x 50 square lattices, and predict phase separation between the superconducting and charge-density wave phases in the strong interaction regime. |
学科主题 | Physics |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.itp.ac.cn/handle/311006/27533] |
专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
作者单位 | 1.Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing 100049, Peoples R China 3.Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA 4.Max Planck Inst Quantum Opt, Hans Kopfermann Str 1, D-85748 Garching, Germany 5.Munich Ctr Quantum Sci & Technol MCQST, Schellingstr 4, D-80799 Munich, Germany |
推荐引用方式 GB/T 7714 | Shi, Tao,Demler, Eugene,Cirac, J. Ignacio. Variational Approach for Many-Body Systems at Finite Temperature[J]. PHYSICAL REVIEW LETTERS,2020,125(18):180602. |
APA | Shi, Tao,Demler, Eugene,&Cirac, J. Ignacio.(2020).Variational Approach for Many-Body Systems at Finite Temperature.PHYSICAL REVIEW LETTERS,125(18),180602. |
MLA | Shi, Tao,et al."Variational Approach for Many-Body Systems at Finite Temperature".PHYSICAL REVIEW LETTERS 125.18(2020):180602. |
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