Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The LHMC Algorithm for Free Field Theory: Reexamining Overrelaxation   We analyze the autocorrelations for the LHMC algorithm in the context of free
field theory. In this case this is just Adler's overrelaxation algorithm. We
consider the algorithm with even/odd, lexicographic, and random updates, and
show that its efficiency depends crucially on this ordering of sites when
optimized for a given class of operators. In particular, we show that, contrary
to previous expectations, it is possible to eliminate critical slowing down
(z[int]=0) for a class of interesting observables, including the magnetic
susceptibility: this can be done with lexicographic updates but is not possible
with even/odd (z[int]=1) or random (z[int]=2) updates. We are considering the
dynamical critical exponent z[int] for integrated autocorrelations rather than
for the exponential autocorrelation time; this is reasonable because it is the
integrated autocorrelation which determines the cost of a Monte Carlo
computation.

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The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-bio
1
The categories of this paper are: cs
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas