Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum impurities: from mobile Josephson junctions to depletons   We overview the main features of mobile impurities moving in one-dimensional
superfluid backgrounds by modeling it as a mobile Josephson junction, which
leads naturally to the periodic dispersion of the impurity. The dissipation
processes, such as radiative friction and quantum viscosity, are shown to
result from the interaction of the collective phase difference with the
background phonons. We develop a more realistic depleton model of an
impurity-hole bound state that provides a number of exact results interpolating
between the semiclassical weakly-interacting picture and the strongly
interacting Tonks-Girardeau regime. We also discuss the physics of a trapped
impurity, relevant to current experiments with ultra cold atoms.

18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg