Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electro-magnetic Aharonov-Bohm effect in a 2-D electron gas ring   We define a mesoscopic ring in a 2-dimensional electron gas (2DEG)
interrupted by two tunnel barriers, enabling us to apply a well-defined
potential difference between the two halves of the ring. The electron
interference in the ring is modified using a perpendicular magnetic field and a
bias voltage. We observe clear Aharonov-Bohm oscillations up to the quantum
Hall regime as a function of both parameters. The electron travel time between
the barriers is found to increase with the applied magnetic field. Introducing
a scattering model, we develop a new method to measure the non-equilibrium
electron dephasing time, which becomes very short at high voltages and magnetic
fields. The relevance of electron-electron interactions is discussed.

30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
2
The categories of this paper are: math
19
The categories of this paper are: eess