Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reorthonormalization of Chebyshev matrix product states for dynamical
  correlation functions   The Chebyshev expansion offers a numerically efficient and easy-implement
algorithm for evaluating dynamic correlation functions using matrix product
states (MPS). In this approach, each recursively generated Chebyshev vector is
approximately represented by an MPS. However, the recurrence relations of
Chebyshev polynomials are broken by the approximation, leading to an error
which is accumulated with the increase of the order of expansion. Here we
propose a reorthonormalization approach to remove this error introduced in the
loss of orthogonality of the Chebyshev polynomials. Our approach, as
illustrated by comparison with the exact results for the one-dimensional XY and
Heisenberg models, improves significantly the accuracy in the calculation of
dynamical correlation functions.

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The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int