论文标题
Majorana Qubit和一个受奇偶校验的超导Qubit之间的交换门
SWAP gate between a Majorana qubit and a parity-protected superconducting qubit
论文作者
论文摘要
高保真量子信息处理需要快速大门和长寿量子记忆的结合。在这项工作中，我们提出了一种混合体系结构，其中一个受奇偶校验保护的超导量子量子直接耦合到Majoraana量子量子量，该量子符合量子记忆的作用。超导量子位基于$π$ - 周期性的约瑟夫森连接处，该连接用栅极可调的半导体线实现，其中抑制了单个库珀对的隧道。其中一根电线还包含四个定义量子的Majorana零模式。我们证明，这可以实现掉期门，从而可以在拓扑和常规量子位之间转导量子信息。该体系结构结合了快速门，可以用超导量子量子和拓扑保护的MajoraNa内存来实现。
High fidelity quantum information processing requires a combination of fast gates and long-lived quantum memories. In this work, we propose a hybrid architecture, where a parity-protected superconducting qubit is directly coupled to a Majorana qubit, which plays the role of a quantum memory. The superconducting qubit is based upon a $π$-periodic Josephson junction realized with gate-tunable semiconducting wires, where the tunneling of individual Cooper pairs is suppressed. One of the wires additionally contains four Majorana zero modes that define a qubit. We demonstrate that this enables the implementation of a SWAP gate, allowing for the transduction of quantum information between the topological and conventional qubit. This architecture combines fast gates, which can be realized with the superconducting qubit, with a topologically protected Majorana memory.
