Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reflectometry of charge transitions in a silicon quadruple dot   Gate-controlled silicon quantum devices are currently moving from academic
proof-of-principle studies to industrial fabrication, while increasing their
complexity from single- or double-dot devices to larger arrays. We perform
gate-based high-frequency reflectometry measurements on a 2x2 array of silicon
quantum dots fabricated entirely using 300 mm foundry processes. Utilizing the
capacitive couplings within the dot array, it is sufficient to connect only one
gate electrode to one reflectometry resonator and still establish
single-electron occupation in each of the four dots and detect single-electron
movements with high bandwidth. A global top-gate electrode adjusts the overall
tunneling times, while linear combinations of side-gate voltages yield detailed
charge stability diagrams. We support our findings with
$\mathbf{k}\cdot\mathbf{p}$ modeling and electrostatic simulations based on a
constant interaction model, and experimentally demonstrate single-shot
detection of interdot charge transitions with unity signal-to-noise ratios at
bandwidths exceeding 30 kHz. Our techniques may find use in the scaling of
few-dot spin-qubit devices to large-scale quantum processors.

26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ