Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fluctuation theorems in feedback-controlled open quantum systems:
  quantum coherence and absolute irreversibility   Thermodynamics of quantum coherence has attracted growing attention recently,
where the thermodynamic advantage of quantum superposition is characterized in
terms of quantum thermodynamics. We investigate thermodynamic effects of
quantum coherent driving in the context of the fluctuation theorem. We adopt a
quantum-trajectory approach to investigate open quantum systems under feedback
control. In these systems, the measurement backaction in the forward process
plays a key role, and therefore the corresponding time-reversed quantum
measurement and post-selection must be considered in the backward process in
sharp contrast to the classical case. The state reduction associated with
quantum measurement, in general, creates a zero-probability region in the space
of quantum trajectories of the forward process, which causes singularly strong
irreversibility with divergent entropy production (i.e., absolute
irreversibility) and hence makes the ordinary fluctuation theorem break down.
In the classical case, the error-free measurement ordinarily leads to absolute
irreversibility because the measurement restricts classical paths to the region
compatible with the measurement outcome. In contrast, in open quantum systems,
absolute irreversibility is suppressed even in the presence of the projective
measurement due to those quantum rare events that go through the classically
forbidden region with the aid of quantum coherent driving. This suppression of
absolute irreversibility exemplifies the thermodynamic advantage of quantum
coherent driving. Absolute irreversibility is shown to emerge in the absence of
coherent driving after the measurement, especially in systems under
time-delayed feedback control. We show that absolute irreversibility is
mitigated by increasing the duration of quantum coherent driving or decreasing
the delay time of feedback control.

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The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph