Bosonic thermoelectric transport and breakdown of universality


Abstract in English

In this paper we compare Bose transport in normal phase atomic gases with its counterpart in Fermi gases, illustrating the non-universality of two dimensional bosonic transport associated with 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 semi-quantitatively consistent with recent Bose gas experiments.

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