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Gravitational Redshift Tests with Atomic Clocks and Atom Interferometers

Di Pumpo, Fabio ; Ufrecht, Christian ; Friedrich, Alexander ; Giese, Enno ; Schleich, Wolfgang P. ; Unruh, William G. (2024)
Gravitational Redshift Tests with Atomic Clocks and Atom Interferometers.
In: PRX Quantum, 2021, 2 (4)
doi: 10.26083/tuprints-00027037
Artikel, Zweitveröffentlichung, Verlagsversion

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Kurzbeschreibung (Abstract)

Atomic interference experiments can probe the gravitational redshift via the internal energy splitting of atoms and thus give direct access to test the universality of the coupling between matter-energy and gravity at different spacetime points. By including possible violations of the equivalence principle in a fully quantized treatment of all atomic degrees of freedom, we characterize how the sensitivity to gravitational redshift violations arises in atomic clocks and atom interferometers, as well as their underlying limitations. Specifically, we show that: (i) Contributions beyond linear order to trapping potentials lead to such a sensitivity of trapped atomic clocks. (ii) Bragg-type interferometers, even with a superposition of internal states, with state-independent, linear interaction potentials are at first insensitive to gravitational redshift tests. However, modified configurations, for example by relaunching the atoms, can mimic such tests under certain conditions and may constitute a competitive alternative. (iii) Guided atom interferometers are comparable to atomic clocks. (iv) Internal transitions lead to state-dependent interaction potentials through which light-pulse atom interferometers can become sensitive to gravitational redshift violations.

Typ des Eintrags: Artikel
Erschienen: 2024
Autor(en): Di Pumpo, Fabio ; Ufrecht, Christian ; Friedrich, Alexander ; Giese, Enno ; Schleich, Wolfgang P. ; Unruh, William G.
Art des Eintrags: Zweitveröffentlichung
Titel: Gravitational Redshift Tests with Atomic Clocks and Atom Interferometers
Sprache: Englisch
Publikationsjahr: 1 August 2024
Ort: Darmstadt
Publikationsdatum der Erstveröffentlichung: November 2021
Ort der Erstveröffentlichung: College Park, MD
Verlag: American Physical Society
Titel der Zeitschrift, Zeitung oder Schriftenreihe: PRX Quantum
Jahrgang/Volume einer Zeitschrift: 2
(Heft-)Nummer: 4
Kollation: 23 Seiten
DOI: 10.26083/tuprints-00027037
URL / URN: https://tuprints.ulb.tu-darmstadt.de/27037
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Herkunft: Zweitveröffentlichungsservice
Kurzbeschreibung (Abstract):

Atomic interference experiments can probe the gravitational redshift via the internal energy splitting of atoms and thus give direct access to test the universality of the coupling between matter-energy and gravity at different spacetime points. By including possible violations of the equivalence principle in a fully quantized treatment of all atomic degrees of freedom, we characterize how the sensitivity to gravitational redshift violations arises in atomic clocks and atom interferometers, as well as their underlying limitations. Specifically, we show that: (i) Contributions beyond linear order to trapping potentials lead to such a sensitivity of trapped atomic clocks. (ii) Bragg-type interferometers, even with a superposition of internal states, with state-independent, linear interaction potentials are at first insensitive to gravitational redshift tests. However, modified configurations, for example by relaunching the atoms, can mimic such tests under certain conditions and may constitute a competitive alternative. (iii) Guided atom interferometers are comparable to atomic clocks. (iv) Internal transitions lead to state-dependent interaction potentials through which light-pulse atom interferometers can become sensitive to gravitational redshift violations.

Status: Verlagsversion
URN: urn:nbn:de:tuda-tuprints-270378
Sachgruppe der Dewey Dezimalklassifikatin (DDC): 500 Naturwissenschaften und Mathematik > 530 Physik
Fachbereich(e)/-gebiet(e): 05 Fachbereich Physik
05 Fachbereich Physik > Institut für Angewandte Physik
05 Fachbereich Physik > Institut für Angewandte Physik > Theoretische Quantenoptik
Hinterlegungsdatum: 01 Aug 2024 12:55
Letzte Änderung: 09 Aug 2024 13:09
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