Spin Drag in Noncondensed Bose Gases

Marco and Giovanni Vignale, Spin Drag in Noncondensed Bose Gases, Phys. Rev. Lett. 103, 170401 (2009)

摘要：

It is shown that show how time-dependent magnetic fields lead to spin motive forces and spin drag in a spinor  Bose gas. The authors proposes to observe these effects in a toroidal trap and analyze this particular proposal in some detail. In the linear-response regime they define a transport coefficient that is analogous to the usual drag resistivity in electron bilayer systems. Because of Bose enhancement of atom-atom scattering, this coefficient strongly increases as temperature is lowered. The authors also investigate the effects of heating.

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