TUR 违反、最小功率波动与增强效率
TUR Violation, Minimal Power Fluctuation, and Enhanced Efficiency
浏览论文内容
中文总结 AI 辅助
研究主动磁陀螺仪，发现其违反TUR，实现高效率和最小功率波动，效率可超卡诺极限，为设计超越卡诺效率的随机热引擎提供新途径。
中文摘要 AI 辅助
我们研究了一个主动磁陀螺仪的性能特征，该陀螺仪由一个惯性带电主动粒子组成，被限制在二维不对称抛物线势阱中，与两个处于不同温度的热浴耦合，并存在垂直于运动平面施加的磁场。与被动布朗陀螺仪相比，后者中功率-效率权衡施加了严格的操作限制，而主动磁陀螺仪则表现出对这一规则的显著违反，允许存在输出功率和效率随负载强度同时增加的区间。此外，尽管热力学不确定性关系（TUR）预测高效发动机必然产生强烈波动的功率，使得布朗陀螺仪在效率接近卡诺极限时变得不可用，但主动磁陀螺仪规避了这一约束。具体而言，它在实现高效率的同时具有最小的功率波动，从而违背了TUR。值得注意的是，其效率甚至可以超过卡诺极限并接近100%，且不损害稳定性。这些结果凸显了主动磁陀螺仪作为设计能够超越卡诺效率的随机热引擎的有前景的装置。
英文摘要
We investigate the performance characteristics of an active magneto gyrator that consists of an inertial charged active particle confined in a two-dimensional asymmetric parabolic potential coupled to two thermal baths maintained at two different temperatures and in the presence of a magnetic field applied perpendicular to the plane of motion. In contrast to the passive Brownian gyrator, where the power-efficiency trade-off imposes strict operational limits, the active magneto gyrator exhibits striking violations of this rule, allowing regimes in which both output power and efficiency increase simultaneously with load strength. Moreover, while the Thermodynamic Uncertainty Relation (TUR) predicts that highly efficient engines necessarily produce strongly fluctuating power, rendering the Brownian gyrator unusable as the efficiency approaches the Carnot bound, the active magneto gyrator circumvents this constraint. Specifically, it achieves high efficiency with minimal power fluctuations, thus defying the TUR. Remarkably, efficiency can even surpass the Carnot limit and approach 100\%, without compromising stability. This condition cannot be achieved in the absence of either activity or a magnetic field. These results highlight the active magneto gyrator as a promising setup for designing stochastic heat engines that can transcend Carnot efficiency.
发表机构
- University of Kerala（喀拉拉大学）
机构由 AI 辅助整理，请以论文原文为准。
