Disorder-induced order in quantum XY chains

A. Niederberger, M. M. Rams, J. Dziarmaga, F. M. Cucchietti, J. Wehr, M. Lewenstein

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

We observe signatures of disorder-induced order in one-dimensional XY spin chains with an external site-dependent uniaxial random field within the XY plane. We numerically investigate signatures of a quantum phase transition at T=0, in particular, an upsurge of the magnetization in the direction orthogonal to the external magnetic field and the scaling of the block entropy with the amplitude of this field. Also, we discuss possible realizations of this effect in ultracold atomic experiments.

Original languageEnglish (US)
Article number013630
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume82
Issue number1
DOIs
StatePublished - Jul 23 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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    Niederberger, A., Rams, M. M., Dziarmaga, J., Cucchietti, F. M., Wehr, J., & Lewenstein, M. (2010). Disorder-induced order in quantum XY chains. Physical Review A - Atomic, Molecular, and Optical Physics, 82(1), [013630]. https://doi.org/10.1103/PhysRevA.82.013630