Normal-transport behavior in finite one-dimensional chaotic quantum systems
Autor(en): | Steinigeweg, R. Gemmer, J. Michel, M. |
Stichwörter: | CHAIN; FOURIERS LAW; HEAT-CONDUCTION; INTEGRABILITY; Physics; Physics, Multidisciplinary; THERMAL CONDUCTION | Erscheinungsdatum: | 2006 | Herausgeber: | EDP SCIENCES S A | Journal: | EUROPHYSICS LETTERS | Volumen: | 75 | Ausgabe: | 3 | Startseite: | 406 | Seitenende: | 412 | Zusammenfassung: | We investigate the transport of energy, magnetization, etc. in several finite one-dimensional (1D) quantum systems only by solving the corresponding time-dependent Schrodinger equation. We explicitly renounce any other transport analysis technique. Varying model parameters we find a sharp transition from non-normal to normal transport and a transition from integrability to chaos, i.e., from Poissonian to Wigner-like level statistics. These transitions always appear in conjunction with each other. We investigate some rather abstract ``design models'' and a ( locally perturbed) Heisenberg spin chain. |
ISSN: | 02955075 | DOI: | 10.1209/epl/i2006-10118-5 |
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