Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Otto refrigerator based on a superconducting qubit: classical and
  quantum performance   We analyse a quantum Otto refrigerator based on a superconducting qubit
coupled to two LC-resonators each including a resistor acting as a reservoir.
We find various operation regimes: nearly adiabatic (low driving frequency),
ideal Otto cycle (intermediate frequency), and non-adiabatic coherent regime
(high frequency). In the nearly adiabatic regime, the cooling power is
quadratic in frequency, and we find substantially enhanced coefficient of
performance $\epsilon$, as compared to that of an ideal Otto cycle. Quantum
coherent effects lead invariably to decrease in both cooling power and
$\epsilon$ as compared to purely classical dynamics. In the non-adiabatic
regime we observe strong coherent oscillations of the cooling power as a
function of frequency. We investigate various driving waveforms: compared to
the standard sinusoidal drive, truncated trapezoidal drive with optimized rise
and dwell times yields higher cooling power and efficiency.

9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg