Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Protecting superconducting qubits from external sources of loss and heat   We characterize a superconducting qubit before and after embedding it along
with its package in an absorptive medium. We observe a drastic improvement in
the effective qubit temperature and over a tenfold improvement in the
relaxation time up to 5.7 $\mu$s. Our results suggest the presence of external
radiation inside the cryogenic apparatus can be a limiting factor for both
qubit initialization and coherence. We infer from simple calculations that
relaxation is not limited by thermal photons in the sample prior to embedding,
but by dissipation arising from quasiparticle generation.

37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math