论文标题
约瑟夫森交界处注入半数额外的费用没有噪音
Half-integer charge injection by a Josephson junction without excess noise
论文作者
论文摘要
拓扑超导体中的约瑟夫森连接可以将电荷E/2注入由手性Majoraana边缘模式携带的正常金属接触中。在这里，我们解决了一个问题，这是一个半数的电荷是否是可观察到的急剧，而没有量子波动。由于主要模式是无间隙的，因此它们支持在零温度下平衡的电荷波动。但是我们发现，通过E/2电荷传输的平衡引入的多余噪声消失了。我们讨论了一种通过重尾的时间依赖性检测效率来减少平衡波动的策略，以实现几乎无嘈杂的半企业电荷转移。
A Josephson junction in a topological superconductor can inject a charge e/2 into a normal-metal contact, carried by chiral Majorana edge modes. Here we address the question whether this half-integer charge is a sharp observable, without quantum fluctuations. Because the Majorana modes are gapless, they support charge fluctuations in equilibrium at zero temperature. But we find that the excess noise introduced out of equilibrium by the e/2 charge transfer vanishes. We discuss a strategy to reduce the equilibrium fluctuations, by means of a heavy-tailed time-dependent detection efficiency, to achieve a nearly noiseless half-integer charge transfer.
