Spontaneous separation of two-component Fermi gases in a double-well trap
Department of Physics, University of Science and Technology Beijing - Beijing 100083, China
Accepted: 28 April 2011
The two-component Fermi gas in a double-well trap is studied using the density functional theory and the density profile of each component is calculated within the Thomas-Fermi approximation. We show that the two components are spatially separate in the two wells once the repulsive interaction exceeds the Stoner point, signaling the occurrence of the ferromagnetic transition. Therefore, the double-well trap helps to explore itinerant ferromagnetism in atomic Fermi gases, since the spontaneous separation can be examined by measuring component populations in one well.
PACS: 03.75.Ss – Degenerate Fermi gases / 67.85.Lm – Degenerate Fermi gases
© EPLA, 2011