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- W1989968372 abstract "We propose a general mechanism of random-field-induced order (RFIO), in which long-range order is induced by a random field that breaks the continuous symmetry of the model. We particularly focus on the case of the classical ferromagnetic $XY$ model on a two-dimensional lattice, in a uniaxial random field. We prove rigorously that the system has spontaneous magnetization at temperature $T=0$, and we present strong evidence that this is also the case for small $T>0$. We discuss generalizations of this mechanism to various classical and quantum systems. In addition, we propose possible realizations of the RFIO mechanism, using ultracold atoms in an optical lattice. Our results shed new light on controversies in existing literature, and open a way to realize RFIO with ultracold atomic systems." @default.
- W1989968372 created "2016-06-24" @default.
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- W1989968372 date "2006-12-29" @default.
- W1989968372 modified "2023-10-08" @default.
- W1989968372 title "Disorder versus the Mermin-Wagner-Hohenberg effect: From classical spin systems to ultracold atomic gases" @default.
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- W1989968372 doi "https://doi.org/10.1103/physrevb.74.224448" @default.
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