Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge fluctuations in coupled systems: ring coupled to a wire or ring   Coupled systems in mesoscopic regime are of interest as charge fluctuation
between the sub-systems will depend on electron-electron interactions and will
play a dominant role in determining their thermodynamic properties. We study
some simple systems like a stub or a bubble strongly coupled to a ring. We show
that for strong electron-electron interaction, there are some regimes where
these charge fluctuations are quenched and charge is individually conserved in
the two subsystems. This feature does not depend on choice of parameters or
charge distribution.

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The categories of this paper are: bayes-an
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The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn