Majorana braiding dynamics in nanowires
Majorana braiding dynamics in nanowires
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DOI：
10.1103/physrevb.91.174305
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发表时间：
2015-05-26
影响因子：
3.7
通讯作者：
Sato, Masatoshi
中科院分区：
文献类型：
--
作者：
Amorim, Cassio Sozinho;Ebihara, Kazuto;Sato, Masatoshi
超导体承载着长期寻求的激发，称为马约拉纳费米子，最终可能被用作容错拓扑量子计算机的量子比特。发展实用拓扑量子计算机的一个关键挑战是实现作为Majorana费米子动力学过程的近简并量子态的量子操作。本文研究了超导纳米线上Majorana费米子的编织动力学。在一个有限大小的系统中，一个非绝热的动力学过程之间的近简并状态主导的编织操作量子比特的马约拉纳费米子。我们的模拟阐明了量子比特在实时编织过程中的行为，并阐明了有效的拓扑量子操作的最佳超导纳米线条件。
Superconductors hosting long-sought excitations called Majorana fermions may ultimately be used as qubits of fault-tolerant topological quantum computers. A crucial challenge for the development of practical topological quantum computers is the implementation of quantum operations of nearly degenerate quantum states as a dynamical process of Majorana fermions. In this paper, we investigate the braiding dynamics of Majorana fermions on superconducting nanowires. In a finite-size system, a nonadiabatic dynamical process between nearly degenerate states dominates the braiding that operates qubits of Majorana fermions. Our simulations clarify how qubits behave in the real-time braiding process and elucidate the optimum superconducting nanowire conditions for efficient topological quantum operation.