Related papers: Rapid optimal work extraction from a quantum-dot information engine

Rapid optimal work extraction from a quantum-dot information engine

URL: http://arxiv.org/abs/2412.06916v3
Date: Wed, 18 Dec 2024 09:32:26 GMT
Title: Rapid optimal work extraction from a quantum-dot information engine
Authors: Kushagra Aggarwal, Alberto Rolandi, Yikai Yang, Joseph Hickie, Daniel Jirovec, Andrea Ballabio, Daniel Chrastina, Giovanni Isella, Mark T. Mitchison, Martí Perarnau-Llobet, Natalia Ares,
Abstract summary: We use a quantum-dot Szilard engine to extract work from thermal fluctuations with maximum efficiency over two decades of driving speed. We design and implement a family of optimised protocols ranging from the slow- to the fast-driving regime. Our results show that, when optimising for efficiency, boosting the power output of a Szilard engine inevitably comes at the cost of increased power fluctuations.
Score: 0.77030827398658
License:
Abstract: The conversion of thermal energy into work is usually more efficient in the slow-driving regime, where the power output is vanishingly small. Efficient work extraction for fast driving protocols remains an outstanding challenge at the nanoscale, where fluctuations play a significant role. In this Letter, we use a quantum-dot Szilard engine to extract work from thermal fluctuations with maximum efficiency over two decades of driving speed. We design and implement a family of optimised protocols ranging from the slow- to the fast-driving regime, and measure the engine's efficiency as well as the mean and variance of its power output in each case. These optimised protocols exhibit significant improvements in power and efficiency compared to the naive approach. Our results also show that, when optimising for efficiency, boosting the power output of a Szilard engine inevitably comes at the cost of increased power fluctuations.

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