Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Squeezing and entanglement of density oscillations in a Bose-Einstein
  condensate   The dispersive interaction of atoms and a far-detuned light field allows
nondestructive imaging of the density oscillations in Bose-Einstein
condensates. Starting from a ground state condensate, we investigate how the
measurement back action leads to squeezing and entanglement of the quantized
density oscillations. In particular, we show that properly timed, stroboscopic
imaging and feedback can be used to selectively address specific eigenmodes and
avoid excitation of non-targeted modes of the system.

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The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math