论文标题
来自非肾脏介质的近场推进力
Near field propulsion forces from nonreciprocal media
论文作者
论文摘要
基于对称性和热力学的论点可能表明在不同温度下两个板之间存在棘轮样的侧面卡西米尔力，而反转对称性则存在。我们发现这是不够的，至少必须由非偏置材料制成一块板。该设置通过将热辐射转换为机械力来充当加热发动机。尽管横向力与近场状态中的热传递的比率与板分离$ d $，一个onsager对称性的比例，我们将其扩展到非偏型板，但将发动机效率限制为carnot值$η_c$。远处的最佳操作速度是$Cη_C$的顺序，其中$ c $是光速。在近场制度中，该速度可以降低到$ \barΩdη_c$的顺序，其中$ \barΩ$是典型的材料频率。
Arguments based on symmetry and thermodynamics may suggest the existence of a ratchet-like lateral Casimir force between two plates at different temperatures and with broken inversion symmetry. We find that this is not sufficient, and at least one plate must be made of nonreciprocal material. This setup operates as a heat engine by transforming heat radiation into mechanical force. Although the ratio of the lateral force to heat transfer in the near field regime diverges inversely with the plates separation, $d$, an Onsager symmetry, which we extend to nonreciprocal plates, limits the engine efficiency to the Carnot value $η_c$. The optimal velocity of operation in the far field is of the order of $cη_c$, where $c$ is the speed of light. In the near field regime, this velocity can be reduced to the order of $\barωd η_c$, where $\barω$ is a typical material frequency.
