标题： 电容耦合超导纳米线中的质量诱导库仑拖拽 显示英文标题

标题： Mass-induced Coulomb drag in capacitively coupled superconducting nanowires

摘要： 我们研究两个电容耦合的超导纳米线系统中的库仑拖曳。 在此背景下，拖曳指的是在主动线施加电流偏置时，在被动线中出现的稳态电压。 偏置线中的量子相位滑移（QPS）会产生可以传递到另一根线的电压波动。 通过微扰和半经典方法，我们表明当两条线都是超导体时，由于等离子体贡献的精确抵消，感应电压消失。 相比之下，当第二根线被调节到超导-绝缘体相变以下并形成质量间隙时，这种抵消被解除，并出现有限的拖曳电压。 拖曳系数表现出从短线中的弱拖曳到长线中由互电容决定的最大值的转变。 电压脉冲传播的半经典图像阐明了该效应的物理起源：质量项同步等离子体模式并防止感应信号的完全抵消。 我们的结果确立了低维超导体中质量诱导的库仑拖曳机制，并提出了在量子临界性附近探测非局域输运的新途径。 显示英文摘要

摘要： We investigate Coulomb drag in a system of two capacitively coupled superconducting nanowires. In this context, drag refers to the appearance of a stationary voltage in the passive wire in response to a current bias applied to the active one. Quantum phase slips (QPS) in the biased wire generate voltage fluctuations that can be transmitted to the other. Using perturbative and semiclassical approaches, we show that when both wires are superconducting the induced voltage vanishes due to exact cancellation of plasmon contributions. By contrast, when the second wire is tuned below the superconductor-insulator transition and develops a mass gap, this cancellation is lifted and a finite drag voltage emerges. The drag coefficient exhibits a crossover from weak drag in short wires to a maximal value set by the mutual capacitance in long wires. A semiclassical picture of voltage pulse propagation clarifies the physical origin of the effect: the mass term synchronizes plasmon modes and prevents complete cancellation of induced signals. Our results establish a mechanism of mass-induced Coulomb drag in low-dimensional superconductors and suggest new routes for probing nonlocal transport near quantum criticality.