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Qubit transformations on Rashba ring with periodic potential
ID Kregar, Ambrož (Author), ID Ramšak, Anton (Author)

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Abstract
A spin-qubit transformation protocol is proposed for an electron in a mesoscopic quantum ring with tunable Rashba interaction controlled by the external electric field. The dynamics of an electron driven around the ring by a series of Landau–Zenner-like transitions between a finite number of local voltage gates is determined analytically. General single-qubit transformations are demonstrated to be feasible in a dynamical basis of localized pseudo-spin states. It is also demonstrated that by the use of suitable protocols based on changes of the Rashba interaction full Bloch sphere can be covered. The challenges of a possible realization of the proposed system in semiconductor heterostructures are discussed.

Language:English
Keywords:quantum mechanics, qubit transformations, quantum rings, Rashba coupling, periodic potential
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
FMF - Faculty of Mathematics and Physics
Publication status:Published
Publication version:Version of Record
Year:2020
Number of pages:15 str.
Numbering:Vol. 22, no. 8, art. 083048
PID:20.500.12556/RUL-128560 This link opens in a new window
UDC:530.145
ISSN on article:1367-2630
DOI:10.1088/1367-2630/aba462 This link opens in a new window
COBISS.SI-ID:25663491 This link opens in a new window
Publication date in RUL:19.07.2021
Views:943
Downloads:166
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Record is a part of a journal

Title:New journal of physics
Publisher:Institute of Physics Publishing, Deutsche Physikalische Gesellschaft
ISSN:1367-2630
COBISS.SI-ID:21135621 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:18.08.2020

Secondary language

Language:Slovenian
Keywords:kvantna mehanika, kubitne transformacije, kvantni obroči, Rashbova sklopitev, periodični potencial

Projects

Funder:ARRS - Slovenian Research Agency
Project number:P1-0044
Name:Teorija trdnih snovi in statistična fizika

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