Popkov, Vladislav, Schmidt, Johannes and Presilla, Carlo (2017). Spin-helix states in the XXZ spin chain with strong boundary dissipation. J. Phys. A-Math. Theor., 50 (43). BRISTOL: IOP PUBLISHING LTD. ISSN 1751-8121
Full text not available from this repository.Abstract
We investigate the non-equilibrium steady state (NESS) in an open quantum XXZ chain attached at the ends to polarization baths with unequal polarizations. Using the general theory developed in Popkov (2017 Phys. Rev. A 95 052131), we show that in the critical XXZ vertical bar Delta vertical bar < 1 easy plane case, the steady current in large systems under strong driving shows resonance-like behaviour, by an infinitesimal change of the spin chain anisotropy or other parameters. Alternatively, by fine tuning the system parameters and varying the boundary dissipation strength, we observe a change of the NESS current from diffusive (of order 1/N, for small dissipation strength) to ballistic regime (of order 1, for large dissipation strength). This drastic change results from an accompanying structural change of the NESS, which becomes a pure spin-helix state characterized by a winding number which is proportional to the system size. We calculate the critical dissipation strength needed to observe this surprising effect.
Item Type: | Journal Article | ||||||||||||||||
Creators: |
|
||||||||||||||||
URN: | urn:nbn:de:hbz:38-213931 | ||||||||||||||||
DOI: | 10.1088/1751-8121/aa86cb | ||||||||||||||||
Journal or Publication Title: | J. Phys. A-Math. Theor. | ||||||||||||||||
Volume: | 50 | ||||||||||||||||
Number: | 43 | ||||||||||||||||
Date: | 2017 | ||||||||||||||||
Publisher: | IOP PUBLISHING LTD | ||||||||||||||||
Place of Publication: | BRISTOL | ||||||||||||||||
ISSN: | 1751-8121 | ||||||||||||||||
Language: | English | ||||||||||||||||
Faculty: | Unspecified | ||||||||||||||||
Divisions: | Unspecified | ||||||||||||||||
Subjects: | no entry | ||||||||||||||||
Uncontrolled Keywords: |
|
||||||||||||||||
Refereed: | Yes | ||||||||||||||||
URI: | http://kups.ub.uni-koeln.de/id/eprint/21393 |
Downloads
Downloads per month over past year
Altmetric
Export
Actions (login required)
View Item |