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Enhanced energy harvesting near exceptional points in systems with (pseudo-)PT-symmetry
Communications Physics ( IF 5.4 ) Pub Date : 2021-04-21 , DOI: 10.1038/s42005-021-00577-5
Lucas J. Fernández-Alcázar , Rodion Kononchuk , Tsampikos Kottos

Exceptional point degeneracies, occurring in non-Hermitian systems, have challenged many well established concepts and led to the development of remarkable technologies. Here, we propose a family of autonomous motors whose operational principle relies on exceptional points via the opportune implementation of a (pseudo-)PT-symmetry and its spontaneous or explicit violation. These motors demonstrate a parameter domain of coexisting high efficiency and maximum work. In the photonic framework, they can be propelled by thermal radiation from the ambient thermal reservoirs and utilized as autonomous self-powered microrobots, or as micro-pumps for microfluidics in biological environments. The same designs can be also implemented with electromechanical elements for harvesting ambient mechanical (e.g., vibrational) noise for powering a variety of auxiliary systems. We expect that our proposal will contribute to the research agenda of energy harvesting by introducing concepts from mathematical and non-Hermitian wave physics.



中文翻译:

具有(伪)PT对称性的系统中异常点附近的能量收集增强

非赫米特系统中发生的异常点退化已经挑战了许多公认的概念,并导致了非凡技术的发展。在这里,我们提出了一系列自动电动机,它们的运行原理依赖于(伪)PT对称性的适当实现及其自发或显式违反的例外点。这些电机展示了并存的高效率和最大工作量的参数域。在光子框架中,它们可以由周围储热器的热辐射推动,并用作自治的自供电微型机器人,或用作生物环境中微流体的微型泵。相同的设计也可以用机电元件来实现,以收集周围的机械(例如,振动)噪声,为各种辅助系统供电。我们希望我们的提案将通过引入数学和非赫米特波物理学的概念,为能量收集的研究议程做出贡献。

更新日期:2021-04-21
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