Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Performance of Complex Langevin Simulation in 0+1 dimensional massive
  Thirring model at finite density   Statistical sampling with the complex Langevin (CL) equation is applied to
(0+1)-dimensional Thirring model, and its uniform-field variant, at finite
fermion chemical potential $\mu$. The CL simulation reproduces a crossover
behavior which is similar to but actually deviating from the exact solution in
the transition region, where we confirm that the CL simulation becomes
susceptible to the drift singularities, i.e., zeros of the fermion determinant.
In order to simulate the transition region with the CL method correctly, we
examine two approaches, a reweighting method and a model deformation, in both
of which a single thimble with an attractive fixed point practically covers the
integration domain and the CL sampling avoids the determinant zeros. It turns
out that these methods can reproduce the correct crossover behavior of the
original model with using reference ensembles in the complexified space.
However, they need evaluation of the reweighting factor, which scales with the
system size exponentially. We discuss feasibility of applying these methods to
the Thirring model and to more realistic theories.

28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg