Quantum information transfer between topological and conventional charge qubits

doi:10.1088/1674-1056/25/2/027302

中国物理B ›› 2016, Vol. 25 ›› Issue (2): 27302-027302.doi: 10.1088/1674-1056/25/2/027302

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Quantum information transfer between topological and conventional charge qubits

Jun Li(栗军) and Yan Zou(邹艳)

College of Physics and Electronic Information, Dezhou University, Dezhou 253023, China

收稿日期:2015-09-01 修回日期:2015-10-10 出版日期:2016-02-05 发布日期:2016-02-05
通讯作者: Jun Li E-mail:lijun@semi.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11304031).

Quantum information transfer between topological and conventional charge qubits

Jun Li(栗军) and Yan Zou(邹艳)

College of Physics and Electronic Information, Dezhou University, Dezhou 253023, China

Received:2015-09-01 Revised:2015-10-10 Online:2016-02-05 Published:2016-02-05
Contact: Jun Li E-mail:lijun@semi.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11304031).

摘要/Abstract

摘要： We propose a scheme to realize coherent quantum information transfer between topological and conventional charge qubits. We first consider a hybrid system where a quantum dot (QD) is tunnel-coupled to a semiconductor Majorana-hosted nanowire (MNW) via using gated control as a switch, the information encoded in the superposition state of electron empty and occupied state can be transferred to each other through choosing the proper interaction time to make measurements. Then we consider another system including a double QDs and a pair of parallel MNWs, it is shown that the entanglement information transfer can be realized between the two kinds of systems. We also realize long distance quantum information transfer between two quantum dots separated by an MNW, by making use of the nonlocal fermionic level formed with the pared Majorana feimions (MFs) emerging at the two ends of the MNW. Furthermore, we analyze the teleportationlike electron transfer phenomenon predicted by Tewari et al. [Phys. Rev. Lett. 100, 027001 (2008)] in our considered system. Interestingly, we find that this phenomenon exactly corresponds to the case that the information encoded in one QD just returns back to its original place during the dynamical evolution of the combined system from the perspective of quantum state transfer.

关键词: quantum state transfer, Majorana feimion, hybrid system

Abstract: We propose a scheme to realize coherent quantum information transfer between topological and conventional charge qubits. We first consider a hybrid system where a quantum dot (QD) is tunnel-coupled to a semiconductor Majorana-hosted nanowire (MNW) via using gated control as a switch, the information encoded in the superposition state of electron empty and occupied state can be transferred to each other through choosing the proper interaction time to make measurements. Then we consider another system including a double QDs and a pair of parallel MNWs, it is shown that the entanglement information transfer can be realized between the two kinds of systems. We also realize long distance quantum information transfer between two quantum dots separated by an MNW, by making use of the nonlocal fermionic level formed with the pared Majorana feimions (MFs) emerging at the two ends of the MNW. Furthermore, we analyze the teleportationlike electron transfer phenomenon predicted by Tewari et al. [Phys. Rev. Lett. 100, 027001 (2008)] in our considered system. Interestingly, we find that this phenomenon exactly corresponds to the case that the information encoded in one QD just returns back to its original place during the dynamical evolution of the combined system from the perspective of quantum state transfer.

Key words: quantum state transfer, Majorana feimion, hybrid system

中图分类号: (Quantum dots)

73.21.La

74.45.+c (Proximity effects; Andreev reflection; SN and SNS junctions) 73.23.Hk (Coulomb blockade; single-electron tunneling)

栗军, 邹艳. Quantum information transfer between topological and conventional charge qubits[J]. 中国物理B, 2016, 25(2): 27302-027302.

Jun Li(栗军) and Yan Zou(邹艳). Quantum information transfer between topological and conventional charge qubits[J]. Chin. Phys. B, 2016, 25(2): 27302-027302.

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Quantum information transfer between topological and conventional charge qubits

Quantum information transfer between topological and conventional charge qubits

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