All-electrically tunable networks of Majorana bound states
All-electrically tunable networks of Majorana bound states
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DOI：
10.1103/physrevb.102.100503
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发表时间：
2020-03
影响因子：
3.7
通讯作者：
Song-Bo Zhang;A. Calzona;B. Trauzettel
中科院分区：
文献类型：
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作者：
Song-Bo Zhang;A. Calzona;B. Trauzettel
二阶拓扑超导体（SOTS）承载局域马约拉纳费米子，并为拓扑量子计算提供了一个新平台。我们提出了一种可行的方法来实现基于 SOTS 的网络，该网络允许人们以全电方式成核和编织马约拉纳束缚态（MBS），而无需微调。所提出的设置可以以简单的方式进行扩展，并且可以容纳任意偶数数量的 MBS。此外，网络中的 MBS 允许定义量子位，其状态可以通过测量 SOTS 岛之间流动的约瑟夫森电流来初始化和读出。我们的建议可以在 $\text{FeTe}{}_{1\ensuremath{-}x}{\text{Se}}_{x}$ 的单层中实现， $1{T}^{\ensuremath{'}}\text{\ensuremath{-}}{\mathrm{WTe}}_{2}$，以及靠近传统超导体的倒置 Hg(Cd)Te 量子阱。
Second-order topological superconductors (SOTSs) host localized Majorana fermions and provide a new platform for topological quantum computation. We propose a feasible way to realize networks based on SOTSs which allow one to nucleate and braid Majorana bound states (MBSs) in an all-electrical manner without fine-tuning. The proposed setups are scalable in a straightforward way and can accommodate any even number of MBSs. Moreover, the MBSs in the networks allow defining qubits whose states can be initialized and read out by measuring Josephson currents flowing between SOTS islands. Our proposal can be implemented in monolayers of $\text{FeTe}{}_{1\ensuremath{-}x}{\text{Se}}_{x}$, monolayers of $1{T}^{\ensuremath{'}}\text{\ensuremath{-}}{\mathrm{WTe}}_{2}$, and inverted Hg(Cd)Te quantum wells in proximity to conventional superconductors.