Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Squeezing as the source of inefficiency in the quantum Otto cycle   The availability of controllable macroscopic devices, which maintain quantum
coherence over relatively long time intervals, for the first time allows an
experimental realization of many effects previously considered only as
Gedankenexperiments, such as the operation of quantum heat engines. The
theoretical efficiency \eta of quantum heat engines is restricted by the same
Carnot boundary \eta_C as for the classical ones: any deviations from
quasistatic evolution suppressing \eta below \eta_C. Here we investigate an
implementation of an analog of the Otto cycle in a tunable quantum coherent
circuit and show that the specific source of inefficiency is the quantum
squeezing of the thermal state due to the finite speed of compression/expansion
of the system.

20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin