Spin Weyl quantum unit: A theoretical proposal

Y. Chen

doi:10.1103/PhysRevB.103.045410

2021-01-12

Y. Chen *

Yuli V. Nazarov

DOI：10.1103/PhysRevB.103.045410

原文链接

查看原文

摘要

En 中文

We propose a four-state quantum system, or quantum unit, that can be realized in superconducting heterostructures. The unit combines the states of a spin and an Andreev qubit providing the opportunity of quantum superpositions of their states. This functionality is achieved by tunnel coupling between a four-terminal superconducting heterostructure housing a Weyl point and a quantum dot. The quantum states in the vicinity of the Weyl point are extremely sensitive to small changes of superconducting phase; this gives rich opportunities for quantum manipulation. We establish an effective Hamiltonian for the setup and describe the peculiarities of the resulting spectrum. We concentrate on the four-state subspace and explain how to make a double qubit in this setup. We review various ways to achieve quantum manipulation in the unit: this includes resonant, adiabatic, diabatic manipulation and combinations of those. We provide detailed illustrations of designing arbitrary quantum gates in the unit.

Keyword:

QUBIT

AI总结

对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。

期刊

Physical Review B

IF:

3.7

论文数:

15.4W

被引数:

41.0W

机构

Delft University of Technology

学者数:

2.6W

论文数: 2.5W

被引数: 3.8W

引用论文

Radiosurgery treatment is associated with improved facial nerve preservation versus repeat resection in recurrent vestibular schwannomas

Acta Neurochirurgica

IF0

2019-05-26

PREAI

Prasanth Romiyo; Edwin Ng; Dillon Dejam; Kevin Ding; John P Sheppard; Courtney Duong; Alyssa Franks; Vera Ong; Methma Udawatta; H. Westley Phillips; Quinton Gopen; Isaac Yang

Multi-terminal Josephson junctions as topological matter

NATURE COMMUNICATIONS

IF15.7

2016-04-04

162

OAAI

Riwar, Roman-Pascal; Houzet, Manuel; Meyer, Julia S.; Nazarov, Yuli V.

The ω-SQUIPT as a tool to phase-engineer Josephson topological materials

NATURE NANOTECHNOLOGY

IF34.9

2016-09-12

OAAI

Strambini, E.; D'Ambrosio, S.; Vischi, F.; Bergeret, F. S.; Nazarov, Yu. V.; Giazotto, F.

Experimental demonstration of a robust and scalable flux qubit

PHYSICAL REVIEW B

IF3.7

2010-04-07

154

OAAI

Harris, R.; Johansson, J.; Berkley, A. J.; Johnson, M. W.; Lanting, T.; Han, Siyuan; Bunyk, P.; Ladizinsky, E.; Oh, T.; Perminov, I.; Tolkacheva, E.; Uchaikin, S.; Chapple, E. M.; Enderud, C.; Rich, C.; Thom, M.; Wang, J.; Wilson, B.; Rose, G.

States in the Gap in Glassy Semiconductors

Physical Review Letters

IF0

1975-11-10

PREAI

R. A. Street; N. F. Mott

Singularities in the Andreev spectrum of a multiterminal Josephson junction

PHYSICAL REVIEW B

IF3.7

2015-10-30

OAAI

Yokoyama, Tomohiro; Nazarov, Yuli V.