Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Entanglement spectrum as a marker for phase transitions in the density
  embedding theory for interacting spinless fermionic models   Entanglement related properties work as nice fingerprint of the quantum
many-body wave function. However, those of fermionic models are hard to
evaluate in standard numerical methods because they suffer from finite size
effects. We show that a so-called density embedding theory (DET) can evaluate
them without size scaling analysis in comparably high quality with those
obtained by the large-size density matrix renormalization group analysis. This
method projects the large scale original many-body Hamiltonian to the small
number of basis sets defined on a local cluster, and optimizes the choice of
these bases by tuning the local density matrix. The DET entanglement spectrum
of one-dimensional interacting fermions perfectly reproduces the exact ones and
works as a marker of the phase transition point. It is further shown that the
phase transitions in two-dimension could be determined by the entanglement
entropy and the fidelity that reflects the change of the structure of the wave
function.

26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: quant-ph