ITP OpenIR  > SCI期刊论文
Ashida, Yuto1; Shi, Tao2; Schmidt, Richard; Sadeghpour, H. R.; Cirac, J. Ignacio; Demler, Eugene6
Efficient variational approach to dynamics of a spatially extended bosonic Kondo model
Source PublicationPHYSICAL REVIEW A
Language英语
KeywordQUANTUM ELECTRONS POLAR
AbstractWe develop an efficient variational approach to studying dynamics of a localized quantum spin coupled to a bath of mobile spinful bosons. We use parity symmetry to decouple the impurity spin from the environment via a canonical transformation and reduce the problem to a model of the interacting bosonic bath. We describe coherent time evolution of the latter using bosonic Gaussian states as a variational ansatz. We provide full analytical expressions for equations describing variational time evolution that can be applied to study in- and out-of-equilibrium phenomena in a wide class of quantum impurity problems. In the accompanying paper [Ashida et al., Phys. Rev. Lett. 123, 183001 (2019)], we present a concrete application of this general formalism to the analysis of the Rydberg central spin model, in which the spin-1/2 Rydberg impurity undergoes spin-changing collisions in a dense cloud of two-component ultracold bosons. To illustrate new features arising from orbital motion of the bath atoms, we compare our results to the Monte Carlo study of the model with spatially localized bosons in the bath, in which random positions of the atoms give rise to random couplings of the standard central spin model.
2019
ISSN2469-9926
Volume100Issue:4Pages:43618
Cooperation Status国际
Subject AreaOptics ; Physics
MOST Discipline CatalogueOptics ; Physics, Atomic, Molecular & Chemical
DOI10.1103/PhysRevA.100.043618
Indexed BySCIE
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/26968
CollectionSCI期刊论文
Affiliation1.Univ Tokyo, Dept Appl Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan
2.Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
3.Chinese Acad Sci, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
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
6.Sadeghpour, H. R.] Harvard Smithsonian Ctr Astrophys, ITAMP, 60 Garden St, Cambridge, MA 02138 USA
7.Harvard Univ, Dept Phys, Cambridge, MA 02138 USA
Recommended Citation
GB/T 7714
Ashida, Yuto,Shi, Tao,Schmidt, Richard,et al. Efficient variational approach to dynamics of a spatially extended bosonic Kondo model[J]. PHYSICAL REVIEW A,2019,100(4):43618.
APA Ashida, Yuto,Shi, Tao,Schmidt, Richard,Sadeghpour, H. R.,Cirac, J. Ignacio,&Demler, Eugene.(2019).Efficient variational approach to dynamics of a spatially extended bosonic Kondo model.PHYSICAL REVIEW A,100(4),43618.
MLA Ashida, Yuto,et al."Efficient variational approach to dynamics of a spatially extended bosonic Kondo model".PHYSICAL REVIEW A 100.4(2019):43618.
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