Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The impact of phonon dispersion on thermodynamical properties in
  computational models of crystalline solids   The existing techniques of account for the phonon dispersion are
computationally costly, while its impact on a variety of thermodynamic
properties appears negligible. We develop a mathematical formalism, which
allows for clear understanding of the effect. The theoretical elaborations are
then confronted with a widely used phenomenological model of the dispersion
relation. The results show that accuracy of the models, which neglect the
phonon dispersion, allows for calculation of many thermodynamic quantities up
to an admissible precision. Although the context refers mainly to the Helmholtz
energy , other properties are concerned as well with less details.
Time-efficient schemes of control over the accuracy loss due to the neglected
phonon dispersion are discussed.

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The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org