A cold-atom ratchet interpolating between classical and quantum dynamics

Autor:	Shrestha, R. K., Lam, W. K., Ni, J., Summy, G. S.
Rok vydání:	2012
Předmět:	Quantum Physics Condensed Matter - Quantum Gases
Druh dokumentu:	Working Paper
Popis:	We study the crossover between classical and quantum dynamics by observing the behavior of a quantum ratchet created by exposing a Bose-Einstein condensate to short pulses of a potential which is periodic in both space and time. Such a ratchet is manifested by a directed current of particles, even though there is an absence of a net bias force. We confirm that the ratchet behavior can under certain circumstances be the same in both regimes. We demonstrate that this behavior can be understood using a single variable containing many of the experimental parameters and thus the ratchet current is describable using a single universal scaling law. Comment: This is a paper following arXiv:1210.6025
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1210.5657 Zobrazit plný text záznamu View this record from Arxiv