论文标题
与波函数密度梯度相关的粒子运动
Particle motion associated with wave function density gradients
论文作者
论文摘要
我们研究了两个耦合波导电位系统中巨大颗粒的量子机械运动，其中波导之间的种群转移有效地充当时钟，并允许确定粒子速度。该方案在反射步骤电位上的逃生现象的应用揭示了经典禁止运动的能量速度关系。如假想的电位所描述的那样，增益和损失区域可加快颗粒的运动。我们认为，量子机械波函数中的相位和密度梯度在指示颗粒速度方面起着互补作用。
We study the quantum mechanical motion of massive particles in a system of two coupled waveguide potentials, where the population transfer between the waveguides effectively acts as a clock and allows particle velocities to be determined. Application of this scheme to evanescent phenomena at a reflective step potential reveals an energy-velocity relationship for classically forbidden motion. Regions of gain and loss, as described by imaginary potentials, are shown to speed up the motion of particles. We argue that phase and density gradients in quantum mechanical wave functions play complementary roles in indicating the speed of particles.
