Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Field Theory of Fluids   The quantum theory of fields is largely based on studying perturbations
around non-interacting, or free, field theories, which correspond to a
collection of quantum-mechanical harmonic oscillators. The quantum theory of an
ordinary fluid is `freer', in the sense that the non-interacting theory also
contains an infinite collection of quantum-mechanical free particles,
corresponding to vortex modes. By computing a variety of correlation functions
at tree- and loop-level, we give evidence that a quantum perfect fluid can be
consistently formulated as a low-energy, effective field theory. We speculate
that the quantum behaviour is radically different to both classical fluids and
quantum fields, with interesting physical consequences for fluids in the low
temperature regime.

20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ