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De-pinning of disordered bosonic chains

Vogt, Nicolas; Cole, Jared H.; Shnirman, Alexander G.

Abstract (englisch):
We consider onset of transport (de-pinning) in one-dimensional bosonic chains with a repulsive boson?boson interaction that decays exponentially on large length-scales. Our study is relevant for (i) de-pinning of Cooper-pairs in Josephson junction arrays; (ii) de-pinning of magnetic flux quanta in quantum-phase-slip ladders, i.e. arrays of superconducting wires in a ladder-configuration that allow for the coherent tunneling of flux quanta. In the low-frequency, long wave-length regime these chains can be mapped onto an effective model of a one-dimensional elastic field in a disordered potential. The standard de-pinning theories address infinitely long systems in two limiting cases: (a) of uncorrelated disorder (zero correlation length); (b) of long range power-law correlated disorder (infinite correlation length). In this paper we study numerically chains of finite length in the intermediate case of long but finite disorder correlation length. This regime is of relevance for, e.g., the experimental systems mentioned above. We study the interplay of three length scales: the system length, the interaction range, the correlation length of disorder. ... mehr

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Volltext §
DOI: 10.5445/IR/1000055884
DOI: 10.1088/1367-2630/18/5/053026
Zitationen: 4
Web of Science
Zitationen: 4
Zugehörige Institution(en) am KIT Institut für Theorie der Kondensierten Materie (TKM)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator ISSN: 1367-2630
KITopen-ID: 1000055884
Erschienen in New Journal of Physics
Band 18
Heft 5
Seiten 053026
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
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