本領域のセミナーシリーズの一環として、10月10日木曜日に東京大学本郷キャンパスにて、Theo Mckeeverさん(University of Manchester)によるセミナーが開催されます。セミナー情報は下記です。

Speaker: Theo Mckeever (University of Manchester)
Date：10th, Oct., 2024 (Thu.), 14:00~　
Place: In-person: Seminar room A/D in Faculty of Engineering Building 6, The University of Tokyo

Title: A Finite-Time Quantum Heat Engine subject to Control Noise and Enhancement Techniques
Abstract: With the development of any quantum technology comes a need for precise control of quantum systems. Here, we investigate the impact of control noise on a quantum Otto cycle. Whilst it is postulated that noiseless quantum engines can approach maximal Otto efficiency in finite times, the existence of white noise on the controls is shown to negatively affect average engine performance. Two methods of quantum enhancement, counterdiabatic driving and quantum lubrication, are implemented and found to improve the performance of the noisy cycle only in specified parameter regimes. Projective measurements, alongside an explicit distinction between heat and work for noisy controls, are used to calculate fluctuations in engine performance. We observe fluctuations increase as average power and efficiency improves, becoming an important measure of thermodynamic performance in the quantum regime. Lastly, by comparing the engine’s average functioning to a projectively-measured engine cycle, the role of coherence in quantum work extraction for this engine model is quantified.