Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SU(2) gauge theory of the Hubbard model: Emergence of an anomalous
  metallic phase near the Mott critical point   We propose one possible mechanism for an anomalous metallic phase appearing
frequently in two spatial dimensions, that is, local pairing fluctuations.
Introducing a pair-rotor representation to decompose bare electrons into
collective pairing excitations and renormalized electrons, we derive an SU(2)
gauge theory of the Hubbard model as an extended version of its U(1) gauge
theory\cite{Florens,LeeLee} to allow only local density fluctuations. Since our
effective SU(2) gauge theory admits two kinds of collective bosons
corresponding to pair excitations and density fluctuations respectively, an
intermediate phase appears naturally between the spin liquid Mott insulator and
Fermi liquid metal of the U(1) gauge theory,\cite{Florens,LeeLee} characterized
by softening of density-fluctuation modes as the Fermi liquid, but gapping of
pair-excitation modes. We show that this intermediate phase is identified with
an anomalous metallic phase because there are no electron-like quasiparticles
although it is metallic.

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The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph