Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superradiant Quantum Phase transition for Landau Polaritons with Rashba
  and Zeeman couplings   We develop a theory of cavity quantum electrodynamics for a two-dimensional
electron gas in the presence of Rashba spin-orbit and Zeeman couplings and
perpendicular magnetic field, coupled to a spatially nonuniform quantum photon
field. We show that the superradiant quantum phase transition (SQPT), also
known as photon condensation, can in principle occur through a pure in-plane
Zeeman coupling, but it requires extremely small (unrealistic) quantum well
widths or extremely fine tuning of the effective Land\'e factor which makes two
Landau levels coincide. Landau level crossings can also be induced by the
Rashba spin-orbit coupling and they promote the SQPT which can be obtained for
certain values of the effective Land\'e factor and filling factors.

31
The categories of this paper are: ao-sci
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The categories of this paper are: mtrl-th
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
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The categories of this paper are: q-alg
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ex
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The categories of this paper are: cs
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph