Demonstration of Quantum Brachistochrones between Distant States of an Atom

Transforming an initial quantum state into a target state through the fastest possible route—a quantum brachistochrone—is a fundamental challenge for many technologies based on quantum mechanics. In two-level systems, the quantum brachistochrone solutions are long known. These solutions, however, ar...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Manolo R. Lam, Natalie Peter, Thorsten Groh, Wolfgang Alt, Carsten Robens, Dieter Meschede, Antonio Negretti, Simone Montangero, Tommaso Calarco, Andrea Alberti
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/593216d2e397407f9f6b798c6c725ffe
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:593216d2e397407f9f6b798c6c725ffe
record_format	dspace
spelling	oai:doaj.org-article:593216d2e397407f9f6b798c6c725ffe2021-12-02T14:02:58ZDemonstration of Quantum Brachistochrones between Distant States of an Atom10.1103/PhysRevX.11.0110352160-3308https://doaj.org/article/593216d2e397407f9f6b798c6c725ffe2021-02-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.011035http://doi.org/10.1103/PhysRevX.11.011035https://doaj.org/toc/2160-3308Transforming an initial quantum state into a target state through the fastest possible route—a quantum brachistochrone—is a fundamental challenge for many technologies based on quantum mechanics. In two-level systems, the quantum brachistochrone solutions are long known. These solutions, however, are not applicable to larger systems, especially when the target state cannot be reached through a local transformation. Here, we demonstrate fast coherent transport of an atomic wave packet over a distance of 15 times its size—a paradigmatic case of quantum processes going beyond the two-level system. Our measurements of the transport fidelity reveal the existence of a minimum duration—a quantum speed limit—for the coherent splitting and recombination of matter waves. We obtain physical insight into this limit by relying on a geometric interpretation of quantum state dynamics. These results shed light on a fundamental limit of quantum state dynamics and are expected to find relevant applications in quantum sensing and quantum computing.Manolo R. LamNatalie PeterThorsten GrohWolfgang AltCarsten RobensDieter MeschedeAntonio NegrettiSimone MontangeroTommaso CalarcoAndrea AlbertiAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 1, p 011035 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Manolo R. Lam Natalie Peter Thorsten Groh Wolfgang Alt Carsten Robens Dieter Meschede Antonio Negretti Simone Montangero Tommaso Calarco Andrea Alberti Demonstration of Quantum Brachistochrones between Distant States of an Atom
description	Transforming an initial quantum state into a target state through the fastest possible route—a quantum brachistochrone—is a fundamental challenge for many technologies based on quantum mechanics. In two-level systems, the quantum brachistochrone solutions are long known. These solutions, however, are not applicable to larger systems, especially when the target state cannot be reached through a local transformation. Here, we demonstrate fast coherent transport of an atomic wave packet over a distance of 15 times its size—a paradigmatic case of quantum processes going beyond the two-level system. Our measurements of the transport fidelity reveal the existence of a minimum duration—a quantum speed limit—for the coherent splitting and recombination of matter waves. We obtain physical insight into this limit by relying on a geometric interpretation of quantum state dynamics. These results shed light on a fundamental limit of quantum state dynamics and are expected to find relevant applications in quantum sensing and quantum computing.
format	article
author	Manolo R. Lam Natalie Peter Thorsten Groh Wolfgang Alt Carsten Robens Dieter Meschede Antonio Negretti Simone Montangero Tommaso Calarco Andrea Alberti
author_facet	Manolo R. Lam Natalie Peter Thorsten Groh Wolfgang Alt Carsten Robens Dieter Meschede Antonio Negretti Simone Montangero Tommaso Calarco Andrea Alberti
author_sort	Manolo R. Lam
title	Demonstration of Quantum Brachistochrones between Distant States of an Atom
title_short	Demonstration of Quantum Brachistochrones between Distant States of an Atom
title_full	Demonstration of Quantum Brachistochrones between Distant States of an Atom
title_fullStr	Demonstration of Quantum Brachistochrones between Distant States of an Atom
title_full_unstemmed	Demonstration of Quantum Brachistochrones between Distant States of an Atom
title_sort	demonstration of quantum brachistochrones between distant states of an atom
publisher	American Physical Society
publishDate	2021
url	https://doaj.org/article/593216d2e397407f9f6b798c6c725ffe
work_keys_str_mv	AT manolorlam demonstrationofquantumbrachistochronesbetweendistantstatesofanatom AT nataliepeter demonstrationofquantumbrachistochronesbetweendistantstatesofanatom AT thorstengroh demonstrationofquantumbrachistochronesbetweendistantstatesofanatom AT wolfgangalt demonstrationofquantumbrachistochronesbetweendistantstatesofanatom AT carstenrobens demonstrationofquantumbrachistochronesbetweendistantstatesofanatom AT dietermeschede demonstrationofquantumbrachistochronesbetweendistantstatesofanatom AT antonionegretti demonstrationofquantumbrachistochronesbetweendistantstatesofanatom AT simonemontangero demonstrationofquantumbrachistochronesbetweendistantstatesofanatom AT tommasocalarco demonstrationofquantumbrachistochronesbetweendistantstatesofanatom AT andreaalberti demonstrationofquantumbrachistochronesbetweendistantstatesofanatom
_version_	1718392080239165440

Demonstration of Quantum Brachistochrones between Distant States of an Atom

Ejemplares similares