Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Influence of Lorentz-violating terms on a two-level system   The influence of Lorentz- and CPT-violating terms of the extended Standard
Model on a semi-classical two-level system is analyzed. It is shown that the
Lorentz-violating background (when coupled with the fermion sector in a vector
way) is able to induce modifications on the Rabi oscillation pattern, promoting
sensitive modulations on the usual oscillations. As for the term involving the
coefficient coupled in an axial vector way, it brings about oscillations both
on energy states and on the spin states (implied by the background). It is also
seen that such backgrounds are able to yield state oscillations even in the
absence of the electromagnetic field. The foreseen effects are used to
establish upper bounds on the Lorentz-violating coefficients.

36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con