Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cluster size convergence of the density matrix embedding theory and its
  dynamical cluster formulation: a study with an auxiliary-field quantum Monte
  Carlo solver   We investigate the cluster size convergence of the energy and observables
using two forms of density matrix embedding theory (DMET): the original cluster
form (CDMET) and a new formulation motivated by the dynamical cluster
approximation (DCA-DMET). Both methods are applied to the half-filled one- and
two-dimensional Hubbard models using a sign-problem free auxiliary-field
quantum Monte Carlo (AFQMC) impurity solver, which allows for the treatment of
large impurity clusters of up to 100 sites. While CDMET is more accurate at
smaller impurity cluster sizes, DCA- DMET exhibits faster asymptotic
convergence towards the thermodynamic limit (TDL). We use our two formulations
to produce new accurate estimates for the energy and local moment of the
two-dimensional Hubbard model for U/t = 2, 4, 6. These results compare
favourably with the best data available in literature, and help resolve earlier
uncertainties in the moment for U/t = 2.

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The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: cs
16
The categories of this paper are: stat
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
23
The categories of this paper are: solv-int