Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Building Blocks of a Flip-Chip Integrated Superconducting Quantum
  Processor   We have integrated single and coupled superconducting transmon qubits into
flip-chip modules. Each module consists of two chips - one quantum chip and one
control chip - that are bump-bonded together. We demonstrate time-averaged
coherence times exceeding $90\,\mu s$, single-qubit gate fidelities exceeding
$99.9\%$, and two-qubit gate fidelities above $98.6\%$. We also present device
design methods and discuss the sensitivity of device parameters to variation in
interchip spacing. Notably, the additional flip-chip fabrication steps do not
degrade the qubit performance compared to our baseline state-of-the-art in
single-chip, planar circuits. This integration technique can be extended to the
realisation of quantum processors accommodating hundreds of qubits in one
module as it offers adequate input/output wiring access to all qubits and
couplers.

14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess