Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum theory of feedback cooling of an anelastic macro-mechanical
  oscillator   Conventional techniques for laser cooling, by coherent scattering off of
internal states or through an optical cavity mode, have so far proved
inefficient on mechanical oscillators heavier than a few nanograms. That is
because larger oscillators vibrate at frequencies much too small compared to
the scattering rates achievable by their coupling to auxiliary modes.
Decoherence mechanisms typically observed in heavy low frequency elastically
suspended oscillators also differ markedly from what is assumed in conventional
treatments of laser cooling. We show that for a low-frequency anelastic
oscillator forming the mechanically compliant end-mirror of a cavity, detuned
optical readout, together with measurement-based feedback to stiffen and dampen
it, can harness ponderomotively generated quantum correlations, to realize
efficient cooling to the motional ground state. This will pave the way for
experiments that call for milligram-scale mechanical oscillators prepared in
pure motional states, for example, for tests of gravity's effect on massive
quantum systems.

18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas