Abstract
In this work we present the concept of a quantum flywheel coupled to a quantum heat engine. The flywheel stores useful work in its energy levels, while additional power is extracted continuously from the device. Generally, the energy exchange between a quantum engine and a quantized work repository is accompanied by heat, which degrades the charging efficiency. Specifically when the quantum harmonic oscillator acts as a work repository, quantum and thermal fluctuations dominate the dynamics. Quantum monitoring and feedback control are applied to the flywheel in order to reach steady state and regulate its operation. To maximize the charging efficiency one needs a balance between the information gained by measuring the system and the information fed back to the system. The dynamics of the flywheel are described by a stochastic master equation that accounts for the engine, the external driving, the measurement, and the feedback operations.
| Original language | English |
|---|---|
| Article number | 052119 |
| Journal | Physical Review A |
| Volume | 93 |
| Issue number | 5 |
| DOIs | |
| State | Published - 27 May 2016 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2016 American Physical Society.
Funding
This work was supported by the Israeli Science Foundation and the Hungarian Scientific Research Fund under Grant No. 103917. Part of this work was supported by the COST Action MP1209 Thermodynamics in the quantum regime.
| Funders | Funder number |
|---|---|
| Israeli Science Foundation | |
| European Cooperation in Science and Technology | |
| Hungarian Scientific Research Fund | 103917 |