Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flop Transitions in Cuprate and Color Superconductors: From SO(5) to
  SO(10) Unification?   The phase diagrams of cuprate superconductors and of QCD at non-zero baryon
chemical potential are qualitatively similar. The Neel phase of the cuprates
corresponds to the chirally broken phase of QCD, and the high-temperature
superconducting phase corresponds to the color superconducting phase. In the
SO(5) theory for the cuprates the $SO(3)_s$ spin rotational symmetry and the
$U(1)_{em}$ gauge symmetry of electromagnetism are dynamically unified. This
suggests that the $SU(2)_L \otimes SU(2)_R \otimes U(1)_B$ chiral symmetry of
QCD and the $SU(3)_c$ color gauge symmetry may get unified to SO(10). Dynamical
enhancement of symmetry from $SO(2)_s \otimes \Z(2)$ to $SO(3)_s$ is known to
occur in anisotropic antiferromagnets. In these systems the staggered
magnetization flops from an easy 3-axis into the 12-plane at a critical value
of the external magnetic field. Similarly, the phase transitions in the SO(5)
and SO(10) models are flop transitions of a ``superspin''. Despite this fact, a
renormalization group flow analysis in $4-\epsilon$ dimensions indicates that a
point with full SO(5) or SO(10) symmetry exists neither in the cuprates nor in
QCD.

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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: chem-ph
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: astro-ph
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The categories of this paper are: stat
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: cs
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The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg