Nano-photoluminescence of natural anyon molecules and topological quantum computation

Abstract The proposal of fault-tolerant quantum computations, which promise to dramatically improve the operation of quantum computers and to accelerate the development of the compact hardware for them, is based on topological quantum field theories, which rely on the existence in Nature of physical...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Alexander M. Mintairov, Dmitrii V. Lebedev, Alexei S. Vlasov, Alexei O. Orlov, Gregory L. Snider, Steven A. Blundell
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8e3034d2b8ed42179018e774c3fe46ea
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:8e3034d2b8ed42179018e774c3fe46ea
record_format	dspace
spelling	oai:doaj.org-article:8e3034d2b8ed42179018e774c3fe46ea2021-11-08T10:50:14ZNano-photoluminescence of natural anyon molecules and topological quantum computation10.1038/s41598-021-00859-62045-2322https://doaj.org/article/8e3034d2b8ed42179018e774c3fe46ea2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-00859-6https://doaj.org/toc/2045-2322Abstract The proposal of fault-tolerant quantum computations, which promise to dramatically improve the operation of quantum computers and to accelerate the development of the compact hardware for them, is based on topological quantum field theories, which rely on the existence in Nature of physical systems described by a Lagrangian containing a non-Abelian (NA) topological term. These are solid-state systems having two-dimensional electrons, which are coupled to magnetic-flux-quanta vortexes, forming complex particles, known as anyons. Topological quantum computing (TQC) operations thus represent a physical realization of the mathematical operations involving NA representations of a braid group B n , generated by a set of n localized anyons, which can be braided and fused using a “tweezer” and controlled by a detector. For most of the potential TQC material systems known so far, which are 2D-electron–gas semiconductor structure at high magnetic field and a variety of hybrid superconductor/topological-material heterostructures, the realization of anyon localization versus tweezing and detecting meets serious obstacles, chief among which are the necessity of using current control, i.e., mobile particles, of the TQC operations and high density electron puddles (containing thousands of electrons) to generate a single vortex. Here we demonstrate a novel system, in which these obstacles can be overcome, and in which vortexes are generated by a single electron. This is a ~ 150 nm size many electron InP/GaInP2 self-organized quantum dot, in which molecules, consisting of a few localized anyons, are naturally formed and exist at zero external magnetic field. We used high-spatial-resolution scanning magneto-photoluminescence spectroscopy measurements of a set of the dots having five and six electrons, together with many-body quantum mechanical calculations to demonstrate spontaneous formation of the anyon magneto-electron particles (e ν ) having fractional charge ν = n/k, where n = 1–4 and k = 3–15 are the number of electrons and vortexes, respectively, arranged in molecular structures having a built-in (internal) magnetic field of 6–12 T. Using direct imaging of the molecular configurations we observed fusion and braiding of e ν -anyons under photo-excitation and revealed the possibility of using charge sensing for their control. Our investigations show that InP/GaInP2 anyon-molecule QDs, which have intrinsic transformations of localized e ν -anyons compatible with TQC operations and capable of being probed by charge sensing, are very promising for the realization of TQC.Alexander M. MintairovDmitrii V. LebedevAlexei S. VlasovAlexei O. OrlovGregory L. SniderSteven A. BlundellNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alexander M. Mintairov Dmitrii V. Lebedev Alexei S. Vlasov Alexei O. Orlov Gregory L. Snider Steven A. Blundell Nano-photoluminescence of natural anyon molecules and topological quantum computation
description	Abstract The proposal of fault-tolerant quantum computations, which promise to dramatically improve the operation of quantum computers and to accelerate the development of the compact hardware for them, is based on topological quantum field theories, which rely on the existence in Nature of physical systems described by a Lagrangian containing a non-Abelian (NA) topological term. These are solid-state systems having two-dimensional electrons, which are coupled to magnetic-flux-quanta vortexes, forming complex particles, known as anyons. Topological quantum computing (TQC) operations thus represent a physical realization of the mathematical operations involving NA representations of a braid group B n , generated by a set of n localized anyons, which can be braided and fused using a “tweezer” and controlled by a detector. For most of the potential TQC material systems known so far, which are 2D-electron–gas semiconductor structure at high magnetic field and a variety of hybrid superconductor/topological-material heterostructures, the realization of anyon localization versus tweezing and detecting meets serious obstacles, chief among which are the necessity of using current control, i.e., mobile particles, of the TQC operations and high density electron puddles (containing thousands of electrons) to generate a single vortex. Here we demonstrate a novel system, in which these obstacles can be overcome, and in which vortexes are generated by a single electron. This is a ~ 150 nm size many electron InP/GaInP2 self-organized quantum dot, in which molecules, consisting of a few localized anyons, are naturally formed and exist at zero external magnetic field. We used high-spatial-resolution scanning magneto-photoluminescence spectroscopy measurements of a set of the dots having five and six electrons, together with many-body quantum mechanical calculations to demonstrate spontaneous formation of the anyon magneto-electron particles (e ν ) having fractional charge ν = n/k, where n = 1–4 and k = 3–15 are the number of electrons and vortexes, respectively, arranged in molecular structures having a built-in (internal) magnetic field of 6–12 T. Using direct imaging of the molecular configurations we observed fusion and braiding of e ν -anyons under photo-excitation and revealed the possibility of using charge sensing for their control. Our investigations show that InP/GaInP2 anyon-molecule QDs, which have intrinsic transformations of localized e ν -anyons compatible with TQC operations and capable of being probed by charge sensing, are very promising for the realization of TQC.
format	article
author	Alexander M. Mintairov Dmitrii V. Lebedev Alexei S. Vlasov Alexei O. Orlov Gregory L. Snider Steven A. Blundell
author_facet	Alexander M. Mintairov Dmitrii V. Lebedev Alexei S. Vlasov Alexei O. Orlov Gregory L. Snider Steven A. Blundell
author_sort	Alexander M. Mintairov
title	Nano-photoluminescence of natural anyon molecules and topological quantum computation
title_short	Nano-photoluminescence of natural anyon molecules and topological quantum computation
title_full	Nano-photoluminescence of natural anyon molecules and topological quantum computation
title_fullStr	Nano-photoluminescence of natural anyon molecules and topological quantum computation
title_full_unstemmed	Nano-photoluminescence of natural anyon molecules and topological quantum computation
title_sort	nano-photoluminescence of natural anyon molecules and topological quantum computation
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8e3034d2b8ed42179018e774c3fe46ea
work_keys_str_mv	AT alexandermmintairov nanophotoluminescenceofnaturalanyonmoleculesandtopologicalquantumcomputation AT dmitriivlebedev nanophotoluminescenceofnaturalanyonmoleculesandtopologicalquantumcomputation AT alexeisvlasov nanophotoluminescenceofnaturalanyonmoleculesandtopologicalquantumcomputation AT alexeioorlov nanophotoluminescenceofnaturalanyonmoleculesandtopologicalquantumcomputation AT gregorylsnider nanophotoluminescenceofnaturalanyonmoleculesandtopologicalquantumcomputation AT stevenablundell nanophotoluminescenceofnaturalanyonmoleculesandtopologicalquantumcomputation
_version_	1718442639753216000

Nano-photoluminescence of natural anyon molecules and topological quantum computation

Ejemplares similares