Damped Bloch Oscillations of Bose-Einstein Condensates in Disordered Potential Gradients

Autor:	Drenkelforth, S., Büning, G. Kleine, Will, J., Schulte, T., Murray, N., Ertmer, W., Santos, L., Arlt, J. J.
Rok vydání:	2008
Předmět:	Condensed Matter - Other Condensed Matter
Druh dokumentu:	Working Paper
DOI:	10.1088/1367-2630/10/4/045027
Popis:	We investigate both experimentally and theoretically disorder induced damping of Bloch oscillations of Bose-Einstein condensates in optical lattices. The spatially inhomogeneous force responsible for the damping is realised by a combination of a disordered optical and a magnetic gradient potential. We show that the inhomogeneity of this force results in a broadening of the quasimomentum spectrum, which in turn causes damping of the centre-of-mass oscillation. We quantitatively compare the obtained damping rates to the simulations using the Gross-Pitaevskii equation. Our results are relevant for high precision experiments on very small forces, which require the observation of a large number of oscillation cycles. Comment: to be published in New Journal of Physics
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0801.3437 Zobrazit plný text záznamu View this record from Arxiv