Рубрики:
BOSE-EINSTEIN CONDENSATE
CHARACTERISTIC VECTORS
INFINITE DIMENSIONS
BLOCH OSCILLATIONS
BORDERED MATRICES
EIGENFUNCTIONS
SUPERLATTICES
AC
BOSE-EINSTEIN CONDENSATE
CHARACTERISTIC VECTORS
INFINITE DIMENSIONS
BLOCH OSCILLATIONS
BORDERED MATRICES
EIGENFUNCTIONS
SUPERLATTICES
AC
Аннотация: This Letter studies the dynamics of a quantum particle in 2D lattices with on-site disorder in the presence of a static field. It is shown that the particle is localized along the field direction, while in the orthogonal direction to the field it shows diffusive dynamics for algebraically large times. For weak disorder an analytical expression for the diffusion coefficient is obtained by mapping the problem to a band random matrix. This expression is confirmed by numerical simulations of the particle's dynamics, which also indicate the existence of a universal equation for the diffusion coefficient, valid for an arbitrary disorder strength.
WOS,
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Держатели документа:
[Kolovsky, A. R.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Kolovsky, A. R.] Siberian Fed Univ, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Коловский, Андрей Радиевич