Dephasing enhanced spin transport in the ergodic phase of a many‐body localizable system
Abstract
We study high temperature spin transport in a disordered Heisenberg chain in the ergodic regime when bulk dephasing is present. We find that while dephasing always renders the transport diffusive, there is nonetheless a remnant of the diffusive to sub‐diffusive transition found in a system without dephasing manifested in the behaviour of the diffusion constant with the dephasing strength. By studying finite‐size effects we show numerically and theoretically that this feature is caused by the competition between large crossover length scales associated to disorder and dephasing that control the dynamics observed in the thermodynamic limit. We demonstrate that this competition may lead to a dephasing enhanced transport in this model. image
- Authors:
-
- Physics Department Faculty of Mathematics and Physics University of Ljubljana 1000 Ljubljana Slovenia
- Departamento de Física Universidad de los Andes A.A. 4976 Bogotá D. C. Colombia, Clarendon Laboratory University of Oxford Parks Road, Oxford OX1 3PU United Kingdom
- Department of Physics University of Bath Claverton Down, Bath BA2 7AY United Kingdom, Max Planck Institute for the Structure and Dynamics of Matter University of Hamburg CFEL Hamburg Germany
- The Abdus Salam ICTP Strada Costiera 11 34151 Trieste Italy
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1401256
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Annalen der Physik (Leipzig)
- Additional Journal Information:
- Journal Name: Annalen der Physik (Leipzig) Journal Volume: 529 Journal Issue: 7; Journal ID: ISSN 0003-3804
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Žnidarič, Marko, Mendoza‐Arenas, Juan Jose, Clark, Stephen R., and Goold, John. Dephasing enhanced spin transport in the ergodic phase of a many‐body localizable system. Germany: N. p., 2016.
Web. doi:10.1002/andp.201600298.
Žnidarič, Marko, Mendoza‐Arenas, Juan Jose, Clark, Stephen R., & Goold, John. Dephasing enhanced spin transport in the ergodic phase of a many‐body localizable system. Germany. https://doi.org/10.1002/andp.201600298
Žnidarič, Marko, Mendoza‐Arenas, Juan Jose, Clark, Stephen R., and Goold, John. Tue .
"Dephasing enhanced spin transport in the ergodic phase of a many‐body localizable system". Germany. https://doi.org/10.1002/andp.201600298.
@article{osti_1401256,
title = {Dephasing enhanced spin transport in the ergodic phase of a many‐body localizable system},
author = {Žnidarič, Marko and Mendoza‐Arenas, Juan Jose and Clark, Stephen R. and Goold, John},
abstractNote = {We study high temperature spin transport in a disordered Heisenberg chain in the ergodic regime when bulk dephasing is present. We find that while dephasing always renders the transport diffusive, there is nonetheless a remnant of the diffusive to sub‐diffusive transition found in a system without dephasing manifested in the behaviour of the diffusion constant with the dephasing strength. By studying finite‐size effects we show numerically and theoretically that this feature is caused by the competition between large crossover length scales associated to disorder and dephasing that control the dynamics observed in the thermodynamic limit. We demonstrate that this competition may lead to a dephasing enhanced transport in this model. image},
doi = {10.1002/andp.201600298},
journal = {Annalen der Physik (Leipzig)},
number = 7,
volume = 529,
place = {Germany},
year = {Tue Dec 13 00:00:00 EST 2016},
month = {Tue Dec 13 00:00:00 EST 2016}
}
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