Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Applying quantum mechanics to macroscopic and mesoscopic systems   There exists a paradigm in which Quantum Mechanics is an exclusively
developed theory to explain phenomena on a microscopic scale. As the Planck's
constant is extremely small, $h\sim10^{-34}{J.s}$, and as in the relation of de
Broglie the wavelength is inversely proportional to the momentum; for a
mesoscopic or macroscopic object the Broglie wavelength is very small, and
consequently the undulatory behavior of this object is undetectable. In this
paper we show that with a particle oscillating around its classical trajectory,
the action is an integer multiple of a quantum of action, $S = nh_{o}$. The
quantum of action, $h_{o}$, which plays a role equivalent to Planck's constant,
is a free parameter that must be determined and depends on the physical system
considered. For a mesoscopic and macroscopic system: $h_{o}\gg h$, this allows
us to describe these systems with the formalism of quantum mechanics.

18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: stat
14
The categories of this paper are: math-ph