Marko Ljubotina (Author), Lenart Zadnik (Author), Tomaž Prosen (Author)

Abstract

We demonstrate ballistic spin transport of an integrable unitary quantum circuit, which can be understood either as a paradigm of an integrable periodically driven (Floquet) spin chain, or as a Trotterized anisotropic (XXZ) Heisenberg spin-1/2 model. We construct an analytic family of quasi-local conservation laws that break the spin-reversal symmetry and compute a lower bound on the spin Drude weight which is found to be a fractal function of the anisotropy parameter. Extensive numerical simulations of spin transport suggest that this fractal lower bound is in fact tight.

Keywords

kvantna mehanika;kvantna statistična mehanika;neravnovesna statistična fizika;balistični transport;spinske verige;quantum mechanics;quantum statistical mechanics;nonequilibrium statistical physics;ballistic transport;spin chains;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FMF - Faculty of Mathematics and Physics
UDC: 536.93
COBISS: 3303268 Link will open in a new window
ISSN: 0031-9007
Views: 900
Downloads: 625
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Slovenian
Secondary keywords: kvantna mehanika;kvantna statistična mehanika;neravnovesna statistična fizika;balistični transport;spinske verige;
Pages: str. 150605-1-150605-6
Volume: ǂVol. ǂ122
Issue: ǂiss. ǂ15
Chronology: 2019
DOI: 10.1103/PhysRevLett.122.150605
ID: 11118835