Enhancing quantum coherence with short-range correlated disorder
We introduce a two-dimensional short-range correlated disorder that is the natural generalization of the well-known one-dimensional dual random dimer model [D. H. Dunlap, Phys. Rev. Lett. 65, 88 (1990)PRLTAO0031-900710.1103/PhysRevLett.65.88]. We demonstrate that, as in one dimension, this model ind...
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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v92_n5_p_Capuzzi http://hdl.handle.net/20.500.12110/paper_10502947_v92_n5_p_Capuzzi |
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| Sumario: | We introduce a two-dimensional short-range correlated disorder that is the natural generalization of the well-known one-dimensional dual random dimer model [D. H. Dunlap, Phys. Rev. Lett. 65, 88 (1990)PRLTAO0031-900710.1103/PhysRevLett.65.88]. We demonstrate that, as in one dimension, this model induces a localization-delocalization transition in the single-particle spectrum. Moreover we show that the effect of such a disorder on a weakly interacting boson gas is to enhance the condensate spatial homogeneity and delocalization and to increase the condensate fraction around an effective resonance of the two-dimensional dual dimers. This study proves that short-range correlations of a disordered potential can enhance the quantum coherence of a weakly interacting many-body system. © 2015 American Physical Society. |
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