Disorder-Induced Order in Quantum XY Chains

Details Disorder-Induced Order in Quantum XY Chains Disorder-Induced Order in Quantum XY Chains

2010-04-12

arxiv.org/abs/1004.1975v1

Physical Review A 82, 013630 (2010)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.82.013630

We observe signatures of disorder-induced order in 1D XY spin chains with an external, site-dependent uni-axial 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 ultra-cold atom experiments.

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