Daemonic ergotropy in continuously-monitored open quantum batteries
- URL: http://arxiv.org/abs/2302.12279v2
- Date: Sat, 28 Oct 2023 13:53:32 GMT
- Title: Daemonic ergotropy in continuously-monitored open quantum batteries
- Authors: Daniele Morrone, Matteo A. C. Rossi, Marco G. Genoni
- Abstract summary: daemonic ergotropy is introduced to properly describe and quantify this work extraction enhancement in the quantum regime.
We show that the corresponding daemonic ergotropy takes values between the ergotropy and the energy of the corresponding unconditional state.
The upper bound is achieved by assuming an initial pure state and a perfectly efficient projective measurement on the environment.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The amount of work that can be extracted from a quantum system can be
increased by exploiting the information obtained from a measurement performed
on a correlated ancillary system. The concept of daemonic ergotropy has been
introduced to properly describe and quantify this work extraction enhancement
in the quantum regime. We here explore the application of this idea in the
context of continuously-monitored open quantum systems, where information is
gained by measuring the environment interacting with the energy-storing quantum
device. We first show that the corresponding daemonic ergotropy takes values
between the ergotropy and the energy of the corresponding unconditional state.
The upper bound is achieved by assuming an initial pure state and a perfectly
efficient projective measurement on the environment, independently of the kind
of measurement performed. On the other hand, if the measurement is inefficient
or the initial state is mixed, the daemonic ergotropy is generally dependent on
the measurement strategy. This scenario is investigated via a paradigmatic
example of an open quantum battery: a two-level atom driven by a classical
field and whose spontaneously emitted photons are continuously monitored via
either homodyne, heterodyne, or photo-detection.
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