Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phonon-number resolution of voltage-biased mechanical oscillators with
  weakly-anharmonic superconducting circuits   Observing quantum phenomena in macroscopic objects, and the potential
discovery of a fundamental limit in the applicability of quantum mechanics, has
been a central topic of modern experimental physics. Highly coherent and heavy
micro-mechanical oscillators controlled by superconducting circuits are a
promising system for this task. Here, we focus in particular on the
electrostatic coupling of motion to a weakly anharmonic circuit, namely the
transmon qubit. In the case of a megahertz mechanical oscillator coupled to a
gigahertz transmon, we explain the difficulties in bridging the large
electro-mechanical frequency gap. To remedy this issue, we explore the
requirements to reach phonon-number resolution in the resonant coupling of a
megahertz transmon and a mechanical oscillator.

31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph