Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extracting energy from non-equilibrium fluctuations without using
  information   Extracting energy from fluctuations has been an everlasting endeavor. An
important strategy is to use information-based operation, which allows energy
extraction even from thermal fluctuations. However, it remains unclear whether
a blind external operation, ignorant of such fluctuations, will also work.
Assuming such a small operation, we find that energy extraction requires a
negative response spectrum in a certain frequency region, which inevitably
requires an internal power source to maintain. Energy is then extracted by
operating the system at these frequencies. Negative response is intrinsic to
any system that adapts to a slow external operation, which could be realized
through integral feedback control. These are demonstrated through a solvable
model.

20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an