Controlling spin current in a trapped Fermi gas

Autor:	Du, X., Zhang, Y., Petricka, J., Thomas, J. E.
Rok vydání:	2009
Předmět:	Condensed Matter - Other Condensed Matter
Druh dokumentu:	Working Paper
Popis:	We study fundamental features of spin current in a very weakly interacting Fermi gas of $^6$Li. By creating a spin current and then reversing its flow, we demonstrate control of the spin current. This reversal is predicted by a spin vector evolution equation in energy representation, which shows how the spin and energy of individual atoms become correlated in the nearly undamped regime of the experiments. The theory provides a simple physical description of the spin current and explains both the large amplitude and the slow temporal evolution of the data. Our results have applications in studying and controlling fundamental spin interactions and spin currents in ultra-cold gases. Comment: Corrected version, Eq. 6 was incorrectly stated in the original submission
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0901.3702 Zobrazit plný text záznamu View this record from Arxiv