Bosonic thermoelectric transport and breakdown of universality

oleh: A Rançon, Cheng Chin, K Levin

Format: Article
Diterbitkan: IOP Publishing 2014-01-01

Deskripsi

We discuss the general principles of transport in normal phase atomic gases, comparing Bose and Fermi systems. Our study shows that two-dimensional bosonic transport is non-universal with respect to different dissipation mechanisms. Near the superfluid transition temperature T _c , a striking similarity between the fermionic and bosonic transport emerges because super-conducting (fluid) fluctuation transport for Fermi gases is dominated by the bosonic, Cooper pair component. As in fluctuation theory, one finds that the Seebeck coefficient changes sign at T _c and the Lorenz number approaches zero at T _c . Our findings appear quantitatively consistent with recent Bose gas experiments.