Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coherent Operation of a Gap-tunable Flux Qubit   We replace the Josephson junction defining a three-junction flux qubit's
properties with a tunable direct current superconducting quantum interference
devices (DC-SQUID) in order to tune the qubit gap during the experiment. We
observe different gaps as a function of the external magnetic pre-biasing field
and the local magnetic field through the DC-SQUID controlled by high-bandwidth
on chip control lines. The persistent current and gap behavior correspond to
numerical simulation results. We set the sensitivity of the gap on the control
lines during the sample design stage. With a tuning range of several GHz on a
qubit dynamics timescale, we observe coherent system dynamics at the degeneracy
point.

18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex