Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photon-assisted tunneling and charge dephasing in a carbon nanotube
  double quantum dot   We report microwave-driven photon-assisted tunneling in a suspended carbon
nanotube double quantum dot. From the resonant linewidth at a temperature of 13
mK, the charge dephasing time is determined to be 280 +- 30 ps. The linewidth
is independent of driving frequency, but increases with increasing temperature.
The moderate temperature dependence is inconsistent with expectations from
electron-phonon coupling alone, but consistent with charge noise arising in the
device. The extracted level of charge noise is comparable with that expected
from previous measurements of a valley-spin qubit, where it was hypothesized to
be the main cause of qubit decoherence. Our results suggest a possible route
towards improved valley-spin qubits.

25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin