Disorder-induced order in quantum XY chains

作者：Niederberger A^*; Rams M M; Dziarmaga J; Cucchietti F M; Wehr J; Lewenstein M

来源：Physical Review A, 2010, 82(1): 013630.

DOI：10.1103/PhysRevA.82.013630

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.

• 出版日期2010-7-23