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Shi, Tao1; Demler, Eugene2; Cirac, J. Ignacio
Variational Approach for Many-Body Systems at Finite Temperature
AbstractWe 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.
Cooperation Status国际
Subject AreaPhysics
MOST Discipline CataloguePhysics, Multidisciplinary
Indexed BySCIE
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Document Type期刊论文
Affiliation1.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
Recommended Citation
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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