Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Displacement and Squeeze Operators of a Three-Dimensional Harmonic
  Oscillator and Their Associated Quantum States   We generalized the squeeze and displacement operators of the one-dimensional
harmonic oscillator to the three-dimensional case and based on these operators
we construct the corresponding coherent and squeezed states. We have also
calculated the Wigner function for the three-dimensional harmonic oscillator
and from the analysis of time evolution of this function, the quantum Liouville
equation is also presented. Further properties of the quantum states including
Mandel's Q and quadrature squeezing parameters are discussed as well.

23
The categories of this paper are: solv-int
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio