Phase transition in a Aubry-Andre system with rapidly oscillating magnetic field

Abstract

We investigate a variant of the Aubry-André-Harper (AAH) model corresponding to a bosonic optical lattice of ultra cold atoms under an effective oscillatory magnetic field. In the limit of high frequency oscillation, the system maybe approximated by an effective time independent Hamiltonian. We have studied localization/delocalization transition exhibited by the effective Hamiltonian. The effective Hamiltonian is found to retain the tight binding tri-diagonal form in position space. In a striking contrast to the usual AAH model, this non-dual system shows an energy dependent mobility edge - a feature which is usually reminiscent of Hamiltonians with beyond the nearest neighbour hoppings in real space. Finally, we discuss possibilities of experimentally realizing this system in optical lattices.

arXiv comment9 pages, 2 Figures. Accepted for publication in Physical Review A

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Cited by in corpus (3)

• Non-equilibrium phase diagram of a 1D quasiperiodic system with a single-particle mobility edge
• `Muhammad Ali effect' and incoherent destruction of Wannier-Stark localization in a stochastic field
• Localization and delocalization properties in quasi-periodically perturbed Kicked Harper and Harper models