Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bond operator mean field theory of the half filled Kondo lattice model   We present a bond-operator mean field theory for the Kondo lattice model at
half filling in two (2D) and three (3D) dimensions. A continuous quantum phase
transition from an antiferromagnetic to a spin-gapped singlet ground state is
found at J/t=1.505 (1.833) in 2D (3D). Additionally we evaluate the
quasiparticle dispersions as well as the staggered magnetic moment and provide
a comparison with complementary numerical approaches.

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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
2
The categories of this paper are: math
9
The categories of this paper are: nlin
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph