Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Nondemolition Squeezing of a Nanomechanical Resonator   We show that the nanoresonator position can be squeezed significantly below
the ground state level by measuring the nanoresonator with a quantum point
contact or a single-electron transistor and applying a periodic voltage across
the detector. The mechanism of squeezing is basically a generalization of
quantum nondemolition measurement of an oscillator to the case of continuous
measurement by a weakly coupled detector. The quantum feedback is necessary to
prevent the ``heating'' due to measurement back-action. We also discuss a
procedure of experimental verification of the squeezed state.

35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con