标题： 可控制的自旋纠缠生成在量子自旋霍尔环中 显示英文标题

标题： Controllable spin entanglement production in a quantum spin Hall ring

摘要： 我们研究了在量子自旋霍尔环结构中纠缠的产生，其中自旋相反的电子从一个源以对的形式发出，并在两个不同的探测器中被收集。 符合检测事件的后选择会在系统中产生纠缠，可通过探测器结果之间的相关性进行测量。 我们选择了一种几何结构，使得纠缠依赖于边缘态在环周围移动时获得的动力学相位。 反过来，相位对栅极电位和Rashba相互作用的依赖性允许对环中纠缠产生的精确电控制。 显示英文摘要

摘要： We study the entanglement production in a quantum spin Hall ring geometry where electrons of opposite spins are emitted in pairs from a source and collected in two different detectors. Postselection of coincidence detector events gives rise to entanglement in the system, measurable through correlations between the outcomes in the detectors. We have chosen a geometry such that the entanglement depends on the dynamical phases picked up by the edge states as they move around the ring. In turn, the dependence of the phases on gate potential and Rashba interaction allows for a precise electrical control of the entanglement production in the ring.