Quasiparticle Poisoning of Majorana Qubits

被引：47

作者：

Karzig, Torsten ^{[1
]}

Cole, William S. ^{[1
]}

Pikulin, Dmitry, I ^{[1
,2
]}

机构：

[1] Microsoft Quantum, Stn Q, Santa Barbara, CA 93106 USA

[2] Microsoft Quantum, Redmond, WA 98052 USA

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 126卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.126.057702

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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-nonequilibrium 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.

引用

页数：7

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