Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Atomistic simulations of the incipient ferroelectric KTaO$_3$   A parameterized effective Hamiltonian approach is used to investigate
KTaO$_3$. We find that the experimentally observed anomalous dielectric
response of this incipient ferroelectric is well reproduced by this approach,
once quantum effects are accounted for. Quantum fluctuations suppress the
paraelectric--to--ferroelectric phase transition; it is unnecessary to
introduce defects to explain the dielectric behavior. The resulting
quantum-induced local structure exhibits off-center atomic displacements that
display {\sl longitudinal, needle-like correlations} extending a few lattice
constants.

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The categories of this paper are: physics
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The categories of this paper are: hep-ph
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The categories of this paper are: cs
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
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The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc