论文标题
马里纳吨的准粒子中毒
Quasiparticle poisoning of Majorana qubits
论文作者
论文摘要
基于Majorana零模式的Qubits是通往拓扑量子计算的有前途的途径。但是，这种量子位容易受到准粒子中毒的影响，这不一定要小于拓扑论点。我们研究了与逼真的设备相关的准粒子中毒的主要来源 - 空隙上方的非平衡性和平衡的局部亚gap状态。根据系统的参数和量子量的架构，这些来源都可以主导量子的分解。但是，我们发现与幼稚的估计相比，在中度无序的浮动主要群岛中，准粒子中毒的时间尺度可能超过几秒钟。
Qubits based on Majorana zero modes are a promising path towards topological quantum computing. Such qubits, though, are susceptible to quasiparticle poisoning which does not have to be small by topological argument. We study the main sources of the quasiparticle poisoning relevant for realistic devices -- non-equilibrium above-gap quasiparticles and equilibrium localized subgap states. Depending on the parameters of the system and the architecture of the qubit either of these sources can dominate the qubit decoherence. However, we find in contrast to naive estimates that in moderately disordered, floating Majorana islands the quasiparticle poisoning can have timescales exceeding seconds.
