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  Asymmetry in energy versus spin transport in certain interacting disordered systems

Mendoza-Arenas, J. J., Žnidarič, M., Varma, V. K., Goold, J., Clark, S. R., & Scardicchio, A. (2019). Asymmetry in energy versus spin transport in certain interacting disordered systems. Physical Review B, 99(9):. doi:10.1103/PhysRevB.99.094435.

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アイテムのパーマリンク: https://hdl.handle.net/21.11116/0000-0003-5D4C-1 版のパーマリンク: https://hdl.handle.net/21.11116/0000-000B-A82E-5
資料種別: 学術論文

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PhysRevB.99.094435.pdf (出版社版), 615KB
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PhysRevB.99.094435.pdf
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Supplemental_Material_Final.pdf (付録資料), 224KB
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© American Physical Society
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URL:
https://dx.doi.org/10.1103/PhysRevB.99.094435 (出版社版)
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https://arxiv.org/abs/1803.11555 (プレプリント)
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作成者

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 作成者:
Mendoza-Arenas, J. J.1, 2, 著者
Žnidarič, M.3, 著者
Varma, V. K.4, 5, 著者
Goold, J.6, 著者
Clark, S. R.7, 8, 著者           
Scardicchio, A.9, 10, 著者
所属:
1Departamento de Física, Universidad de los Andes, ou_persistent22              
2Clarendon Laboratory, University of Oxford, ou_persistent22              
3Physics Department, Faculty of Mathematics and Physics, University of Ljubljana, ou_persistent22              
4College of Staten Island and Graduate Center, CUNY, ou_persistent22              
5Department of Physics and Astronomy, University of Pittsburgh, ou_persistent22              
6School of Physics, Trinity College Dublin, ou_persistent22              
7H.H. Wills Physics Laboratory, University of Bristol, ou_persistent22              
8Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
9Abdus Salam ICTP, ou_persistent22              
10INFN, Sezione di Trieste, ou_persistent22              

内容説明

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 要旨: We study energy transport in disordered XXZ spin-1/2 chains driven to nonequilibrium configurations by thermal reservoirs of different temperatures at the boundaries, using large-scale matrix product simulations. In particular we discuss the transition between diffusive and subdiffusive transport in sectors of zero and finite magnetization at high temperature. At large anisotropies we find that diffusive energy transport prevails over a large range of disorder strengths, which is in contrast to spin transport that is subdiffusive in the same regime for weak disorder. However, at finite magnetization both energy and spin currents decay as a function of the system size with the same exponent. We conclude that diffusion of energy is much more pervasive than that of magnetization in these disordered spin-1/2 systems, and occurs across a significant range of the interaction-disorder parameter phase space. We support the existence of this asymmetry, reminiscent of that in the clean limit, by an analytical estimation of diffusion constants for weak disorder.

資料詳細

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言語: eng - English
 日付: 2019-01-232018-05-092019-03-222019-03-22
 出版の状態: 出版
 ページ: -
 出版情報: -
 目次: -
 査読: 査読あり
 識別子（DOI, ISBNなど）: DOI: 10.1103/PhysRevB.99.094435
arXiv: 1803.11555
 学位: -

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Project information

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Project name : -
Grant ID : 319286
Funding program : Funding Programme 7 (FP7)
Funding organization : European Commission (EC)
Project name : -
Grant ID : 758403
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)
Project name : The authors would like to acknowledge the use of the University of Oxford Advanced Research Computing (ARC) facility in carrying out this work [80]. This research is partially funded by the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013)/ERC Grant Agreement No. 319286 Q-MAC. This work was also supported by the Engineering and Physical Sciences Research Council (EPSRC) National Quantum Technology Hub in Networked Quantum Information Processing (NQIT) Grant No. EP/M013243/1. This project also received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (Grant Agreement No. 758403). J.J.M.-A. acknowledges financial support from Vicerrectoría de Investigaciones through UniAndes-2015 project Quantum control of nonequilibrium hybrid systems-Part II. S.R.C. gratefully acknowledges support from the UK's EPSRC under Grant No. EP/P025110/1. J.G. is supported by a Science Foundation of Ireland (SFI) Royal Society University Research Fellowship. A.S. is partially supported by a Google Faculty Award. We acknowledge helpful discussions with A. Dymarsky, D. A. Huse, V. Oganesyan, and P. Prelovšek.
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出版物 1

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出版物名: Physical Review B
  省略形 : Phys. Rev. B
種別: 学術雑誌
 著者・編者:
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出版社, 出版地: Woodbury, NY : American Physical Society
ページ: - 巻号: 99 (9) 通巻号: 094435 開始・終了ページ: - 識別子（ISBN, ISSN, DOIなど）: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008