Disorder-induced order in quantum XY chains

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

doi:10.1103/PhysRevA.82.013630

Disorder-induced order in quantum XY chains

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

Mathematics

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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 language	English (US)
Article number	013630
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	82
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevA.82.013630
State	Published - Jul 23 2010

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.82.013630

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AU - Dziarmaga, J.

AU - Cucchietti, F. M.

AU - Wehr, J.

AU - Lewenstein, M.

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AB - 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.

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Disorder-induced order in quantum XY chains

Abstract

ASJC Scopus subject areas

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