Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photon Assisted Tunneling in Quantum Dots   We review experiments on single electron transport through single quantum
dots in the presence of a microwave signal. In the case of a small dot with
well-resolved discrete energy states, the applied high-frequency signal allows
for inelastic tunnel events that involve the exchange of photons with the
microwave field. These photon assisted tunneling (PAT) processes give rise to
sideband resonances in addition to the main resonance. Photon absorption can
also lead to tunneling via excited states instead of tunneling via the ground
state of the quantum dot.

37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics