Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New n-mode squeezing operator and squeezed states with standard
  squeezing   We find that the exponential operator V=exp[ilamda
(Q_1P_2+Q_2P_3+...+Q_{n-1}P_{n}+Q_{n}P_1)], Q_{i}, P_{i} are respectively the
coordinate and momentum operators, is an n-mode squeezing operator which
engenders standard squeezing. By virtue of the technique of integration within
an ordered product of operators we derive V's normally ordered expansion and
obtain the n-mode squeezed vacuum states, its Wigner function is calculated by
using the Weyl ordering invariance under similar transformations.

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The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
3
The categories of this paper are: physics
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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
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The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
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The categories of this paper are: dg-ga