Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flow equations for the Anderson Hamiltonian   Using a continuous unitary transformation recently proposed by Wegner
\cite{Wegner} together with an approximation that neglects irrelevant
contributions, we obtain flow equations for Hamiltonians. These flow equations
yield a diagonal or almost diagonal Hamiltonian. As an example we investigate
the Anderson Hamiltonian for dilute magnetic alloys. We study the different
fixed points of the flow equations and the corresponding relevant, marginal or
irrelevant contributions. Our results are consistent with results obtained by a
numerical renormalization group method, but our approach is considerably
simpler.

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The categories of this paper are: gr-qc
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The categories of this paper are: math
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
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The categories of this paper are: hep-th
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The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph