Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radiation Pressure Cooling as a Quantum Dynamical Process   One of the most fundamental problems in optomechanical cooling is how small
the thermal phonon number of a mechanical oscillator can be achieved under the
radiation pressure of a proper cavity field. Different from previous
theoretical predictions, which were based on an optomechanical system's
time-independent steady states, we treat such cooling as a dynamical process of
driving the mechanical oscillator from its initial thermal state, due to its
thermal equilibrium with the environment, to a stabilized quantum state of
higher purity. We find that the stabilized thermal phonon number left in the
end actually depends on how fast the cooling process could be. The cooling
speed is decided by an effective optomechanical coupling intensity, which
constitutes an essential parameter for cooling, in addition to the sideband
resolution parameter that has been considered in other theoretical studies. The
limiting thermal phonon number that any cooling process cannot surpass exhibits
a discontinuous jump across a certain value of the parameter.

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The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: astro-ph
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: q-fin
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The categories of this paper are: cond-mat
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The categories of this paper are: atom-ph
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The categories of this paper are: physics
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The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex
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The categories of this paper are: econ