Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimal configurations for normal-metal traps in transmon qubits   Controlling quasiparticle dynamics can improve the performance of
superconducting devices. For example, it has been demonstrated effective in
increasing lifetime and stability of superconducting qubits. Here we study how
to optimize the placement of normal-metal traps in transmon-type qubits. When
the trap size increases beyond a certain characteristic length, the details of
the geometry and trap position, and even the number of traps, become important.
We discuss for some experimentally relevant examples how to shorten the decay
time of the excess quasiparticle density. Moreover, we show that a trap in the
vicinity of a Josephson junction can reduce the steady-state quasiparticle
density near that junction, thus suppressing the quasiparticle-induced
relaxation rate of the qubit. Such a trap also reduces the impact of
fluctuations in the generation rate of quasiparticles, rendering the qubit more
stable.

11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg