论文标题
环中的量子回流
Quantum backflow in a ring
论文作者
论文摘要
量子粒子的自由运动完全由具有非阴性矩的平面波组成的波函数，可能伴随着负概率电流，这种效果称为量子回流。效果弱且脆弱，尚未在实验中观察到。在这里，我们表明量子回流变得更加明显，并且更适合实验观察，如果而不是让粒子沿着直线移动，而是强迫它在圆环中移动。
Free motion of a quantum particle with the wave function entirely comprised of plane waves with non-negative momenta may be accompanied by negative probability current, an effect called quantum backflow. The effect is weak and fragile, and has not yet been observed experimentally. Here we show that quantum backflow becomes significantly more pronounced and more amenable to experimental observation if, instead of letting the particle move along a straight line, one forces it to move in a circular ring.
