论文标题
长距离的长距离连贯性
Long distance coherence of Majorana wires
论文作者
论文摘要
从理论上讲，拓扑超导体中的一对主要结合状态即使在大分离处也会形成单个费米子水平，这意味着奇偶校验信息是非局部存储的。非局部性导致通过库仑封锁的电子隧穿的长距离连贯性，封锁了主要的Majorana电线[Fu，Phys。莱特牧师。 104，056402（2010）]，可以在干涉仪中观察到的效果。在这里，我们从理论上检查了相干电子的传递，考虑到隧道意味着由一维等离子体携带的电荷的长距离转移。我们表明，电荷动力学不会影响拓扑超导体中电子隧穿过程的相干性，该拓扑超导体由由单个散装超导体接近的半导体线组成。但是，如果拓扑超导率源自由颗粒超导体接近临时的半导体线，则可以强烈抑制相干性。
Theoretically, a pair of Majorana bound states in a topological superconductor forms a single fermionic level even at large separations, implying that the parity information is stored nonlocally. The nonlocality leads to a long-distance coherence for electrons tunneling through a Coulomb blockaded Majorana wire [Fu, Phys. Rev. Lett. 104, 056402 (2010)], an effect that can be observed, e.g., in an interferometer. Here, we examine theoretically the coherent electron transfer, taking into account that tunneling implies the long-distance transfer of charge, which is carried by one-dimensional plasmons. We show that the charge dynamics does not affect the coherence of the electron tunneling process in a topological superconductor consisting of a semiconductor wire proximitized by a single bulk superconductor. The coherence may be strongly suppressed, however, if the topological superconductivity derives from a semiconductor wire proximitized by a granular superconductor.
