Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sign Reversals of ac Magnetoconductance in Isolated Quantum Dots   We have measured the electromagnetic response of micron-size isolated
mesoscopic GaAs/GaAlAs square dots down to temperature T=16mK, by coupling them
to an electromagnetic micro-resonator. Both dissipative and non dissipative
responses exhibit a large magnetic field dependent quantum correction, with a
characteristic flux scale which corresponds to a flux quantum in a dot. The
real (dissipative) magnetoconductance changes sign as a function of frequency
for low enough density of electrons. The signal observed at frequency below the
mean level spacing corresponds to a negative magnetoconductance, which is
opposite to the weak localization seen in connected systems, and becomes
positive at higher frequency. We propose an interpretation of this phenomenon
in relation to fundamental properties of energy level spacing statistics in the
dots.

16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
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The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
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The categories of this paper are: adap-org