文献类型：期刊文献

英文题名：Manipulating the Majorana qubit with Landau-Zener-Stückelberg interference

作者：Huang, Wen-Chao[1]; Liang, Qi-Feng[2]; Yao, Dao-Xin[1]; Wang, Zhi[1]

机构：[1] State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou, 510275, China; [2] Department of Physics, Shaoxing University, Shaoxing, 312000, China

年份：2015

卷号：92

期号：1

外文期刊名：Physical Review A

收录：EI(收录号：20152801030575)、Scopus(收录号：2-s2.0-84936970763)

语种：英文

外文关键词：Molluscs - Quantum interference devices - Quantum optics - Shellfish - SQUIDs - Topology

外文摘要：Constructing a universal operation scheme for Majorana qubits remains a central issue for the topological quantum computation. We study the Landau-Zener-Stückelberg interference in a Majorana qubit and show that this interference can be used to achieve controllable operations. The Majorana qubit consists of an rf superconducting quantum interference device (SQUID) with a topological nanowire Josephson junction which hosts Majorana bound states. In the SQUID, a magnetic flux pulse can drive the quantum evolution of the Majorana qubit. The qubit experiences two Landau-Zener transitions when the amplitude of the pulse is tuned around the superconducting flux quanta h/2e. The Landau-Zener-Stückelberg interference between the two transitions rotates the Majorana qubit, with the angle controlled by the time scale of the pulse. This rotation operation implements a high-speed single-qubit gate on the Majorana qubit, which is a necessary ingredient for the topological quantum computation. ? 2015 American Physical Society.