Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exact renormalization group for quantum spin systems   We show that the diagrammatic approach to quantum spin systems developed in a
seminal work by Vaks, Larkin, and Pikin [Sov. Phys. JETP 26, 188 (1968)] can be
embedded in the framework of the functional renormalization group. The crucial
insight is that the generating functional of the time-ordered connected spin
correlation functions of an arbitrary quantum spin system satisfies an exact
renormalization group flow equation which resembles the corresponding flow
equation of a system of interacting bosons. The $SU (2)$ spin algebra is
implemented via a non-trivial initial condition for the renormalization group
flow. Our method is rather general and offers a new non-perturbative approach
to quantum spin systems.

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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: hep-th
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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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: cmp-lg
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: math