Issue |
EPL
Volume 140, Number 1, October 2022
|
|
---|---|---|
Article Number | 11004 | |
Number of page(s) | 6 | |
Section | Statistical physics and networks | |
DOI | https://doi.org/10.1209/0295-5075/ac954b | |
Published online | 10 October 2022 |
Dissipative cooling towards phantom Bethe states in boundary-driven XXZ spin chain
1 Faculty of Mathematics and Physics, University of Ljubljana - Jadranska 19, SI-1000 Ljubljana, Slovenia
2 Bergisches Universität Wuppertal - Gauss Str. 20, D-42097 Wuppertal, Germany
3 Dipartimento di Fisica “E.R. Caianiello”, and INFN, Gruppo Collegato di Salerno, Università di Salerno Via Giovanni Paolo II, I-84084 Fisciano (SA), Italy
(a) E-mail: vladipopkov@gmail.com (corresponding author)
Received: 24 July 2022
Accepted: 27 September 2022
A dissipative method that allows to access the family of phantom Bethe states (PBS) of boundary-driven XXZ spin chains is introduced. The method consists in coupling the ends of the open spin chain to suitable dissipative magnetic baths to force the edge spins to satisfy specific boundary conditions necessary for the PBS existence. Cumulative monotonous depopulation of the non-chiral components of the density matrix with growing dissipation amplitude is analogous to the depopulation of high-energy states in response to thermal cooling. Compared to generic states, PBS have strong chirality, non-trivial topology and carry high spin currents.
© 2022 The author(s)
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