Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Path-integral Monte Carlo for the Gauge-fixed Berry Connection and the
  Local Z_2 Berry Phase   We present a general formula of the gauge-fixed Berry connection which can be
evaluated by path- integral Monte Carlo method. We also propose that the
gauge-fixed local Berry connection can be an- other effective tool to estimate
precisely the quantum critical point. For a demonstration, we calculate the
gauge-fixed Berry connection and the local Z2 Berry phase of the
antiferromagnetic Heisenberg model on a staggered bond-alternating ladder, and
estimated quantum critical point is consistent with other methods.

15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
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The categories of this paper are: econ
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The categories of this paper are: solv-int
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph
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The categories of this paper are: nlin
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The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn