Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Work extraction via quantum nondemolition measurements of qubits in
  cavities: Non-Markovian effects   We show that frequent nondemolition measurements of a quantum system immersed
in a thermal bath allow the extraction of work in a closed cycle from the
system-bath interaction (correlation) energy, a hitherto unexploited work
resource. It allows for work even if no information is gathered or the bath is
at zero temperature, provided the cycle is within the bath memory time. The
predicted work resource may be the basis of quantum engines embedded in a bath
with long memory time, such as the electromagnetic bath of a high-Q cavity
coupled to two-level systems.

34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th