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:
CreatorsEmailORCIDORCID Put Code
Popkov, VladislavUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schmidt, JohannesUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Presilla, CarloUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
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:
KeywordsLanguage
QUANTUM; REALIZATION; DYNAMICSMultiple languages
Physics, Multidisciplinary; Physics, MathematicalMultiple languages
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 View Item