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Qubit transformations on Rashba ring with periodic potential
ID
Kregar, Ambrož
(
Author
),
ID
Ramšak, Anton
(
Author
)
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MD5: B33405235CA9DFD838764A4719D202B2
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https://iopscience.iop.org/article/10.1088/1367-2630/aba462
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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
UDC:
530.145
ISSN on article:
1367-2630
DOI:
10.1088/1367-2630/aba462
COBISS.SI-ID:
25663491
Publication date in RUL:
19.07.2021
Views:
1125
Downloads:
182
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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
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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