Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tuning Fano-type resonances in coupled quantum point contacts by
  applying asymmetric voltages   We study the ballistic magnetotransport in a double quantum point contact
(QPC) device consisting of a quasi-one-dimensional quantum wire with an
embedded island-like impurity - etched nano-hole as in a recently published
experiment [J. C. Chen, Y. Lin, K.-T. Lin, T. Ueda and S. Komiyama, Appl. Phys.
Lett. 94, 012105 (2009)]. We reproduce the zero field quantized conductance,
the interference phenomenon induced by the coupled QPCs, as well as the
Ramsauer-like resonances observed in the experiments. At finite magnetic fields
Fano-type resonances arises in the conductance due to the formation of
localized states at the impurity periphery and to an inter-edge state resonant
coupling effect. It is predicted that the Fano-type resonances can be
controlled by an asymmetric confinement of the QPCs.

13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph