Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effective temperature of a superfluid flowing in a random potential   The spatial fluctuations of a superfluid flowing in a weak random potential
are investigated. We employ classical field theory to demonstrate that the
disorder-averaged nonequilibrium second-order correlation of the order
parameter at zero temperature is identical to the thermally averaged
equilibrium counterpart of a uniform superfluid at an effective temperature.
The physics behind this equivalence is that scattering of a moving condensate
by disorder has the same effect on the correlation function as equilibrium
thermal excitations. The correlation function exhibits an exponential decay in
one dimension and a power-law decay in two dimensions. We show that the
effective temperature can be measured in an interference experiment of
ultracold atomic gases.

36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom