elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Datenschutz | Kontakt | English
Schriftgröße: [-] Text [+]

Gravitational Redshift in Quantum-Clock Interferometry

Roura, Albert (2020) Gravitational Redshift in Quantum-Clock Interferometry. Physical Review X, 10 (2), 021014. American Physical Society. doi: 10.1103/PhysRevX.10.021014. ISSN 2160-3308.

[img] PDF - Verlagsversion (veröffentlichte Fassung)
1MB

Offizielle URL: https://journals.aps.org/prx/abstract/10.1103/PhysRevX.10.021014

Kurzfassung

The creation of delocalized coherent superpositions of quantum systems experiencing different relativistic effects is an important milestone in future research at the interface of gravity and quantum mechanics. This milestone could be achieved by generating a superposition of quantum clocks that follow paths with different gravitational time dilation and investigating the consequences on the interference signal when they are eventually recombined. Light-pulse atom interferometry with elements employed in optical atomic clocks is a promising candidate for that purpose, but it suffers from major challenges including its insensitivity to the gravitational redshift in a uniform field. All of these difficulties can be overcome with the novel scheme presented here, which is based on initializing the clock when the spatially separate superposition has already been generated and performing a doubly differential measurement where the differential phase shift between the two internal states is compared for different initialization times. This scheme can be exploited to test the universality of the gravitational redshift with delocalized coherent superpositions of quantum clocks, and it is argued that its experimental implementation should be feasible with a new generation of 10-meter atomic fountains that will soon become available. Interestingly, the approach also offers significant advantages for more compact setups based on guided interferometry or hybrid configurations. Furthermore, in order to provide a solid foundation for the analysis of the various interferometry schemes and the effects that can be measured with them, a general formalism for a relativistic description of atom interferometry in curved spacetime is developed. It can describe freely falling atoms as well as the effects of external forces and guiding potentials, and it can be applied to a very wide range of situations. As an important ingredient for quantum-clock interferometry, suitable diffraction mechanisms for atoms in internal-state superpositions are investigated too. Finally, the relation of the proposed doubly differential measurement scheme to other experimental approaches and to tests of the universality of free fall is discussed in detail.

elib-URL des Eintrags:https://elib.dlr.de/134739/
Dokumentart:Zeitschriftenbeitrag
Titel:Gravitational Redshift in Quantum-Clock Interferometry
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Roura, AlbertAlbert.Roura (at) dlr.dehttps://orcid.org/0000-0002-8049-8982NICHT SPEZIFIZIERT
Datum:20 April 2020
Erschienen in:Physical Review X
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:10
DOI:10.1103/PhysRevX.10.021014
Seitenbereich:021014
Verlag:American Physical Society
ISSN:2160-3308
Status:veröffentlicht
Stichwörter:Atomic and Molecular Physics, Gravitation, Quantum Physics
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Kommunikation, Navigation, Quantentechnologien
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R KNQ - Kommunikation, Navigation, Quantentechnologie
DLR - Teilgebiet (Projekt, Vorhaben):R - Fundamental physics
Standort: Ulm
Institute & Einrichtungen:Institut für Quantentechnologien > Theoretische Quantenphysik
Hinterlegt von: Roura, Dr. Albert
Hinterlegt am:16 Mär 2021 12:42
Letzte Änderung:24 Okt 2023 11:56

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Gestaltung Webseite und Datenbank: Copyright © Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.