Schach, Patrik ; Giese, Enno (2024)
A unified theory of tunneling times promoted by Ramsey clocks.
In: Science Advances, 10 (16)
doi: 10.1126/sciadv.adl6078
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
What time does a clock tell after quantum tunneling? Predictions and indirect measurements range from superluminal or instantaneous tunneling to finite durations, depending on the specific experiment and the precise definition of the elapsed time. Proposals and implementations use the atomic motion to define this delay, although the inherent quantum nature of atoms implies a delocalization and is in sharp contrast to classical trajectories. Here, we rely on an operational approach: We prepare atoms in a coherent superposition of internal states and study the time read-off via a Ramsey sequence after the tunneling process without the notion of classical trajectories or velocities. Our operational framework (i) unifies definitions of tunneling delay within one approach, (ii) connects the time to a frequency standard given by a conventional atomic clock that can be boosted by differential light shifts, and (iii) highlights that there exists no superluminal or instantaneous tunneling.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Schach, Patrik ; Giese, Enno |
| Art des Eintrags: | Bibliographie |
| Titel: | A unified theory of tunneling times promoted by Ramsey clocks |
| Sprache: | Englisch |
| Publikationsjahr: | 17 April 2024 |
| Verlag: | American Association for the Advancement of Science |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Science Advances |
| Jahrgang/Volume einer Zeitschrift: | 10 |
| (Heft-)Nummer: | 16 |
| DOI: | 10.1126/sciadv.adl6078 |
| Kurzbeschreibung (Abstract): | What time does a clock tell after quantum tunneling? Predictions and indirect measurements range from superluminal or instantaneous tunneling to finite durations, depending on the specific experiment and the precise definition of the elapsed time. Proposals and implementations use the atomic motion to define this delay, although the inherent quantum nature of atoms implies a delocalization and is in sharp contrast to classical trajectories. Here, we rely on an operational approach: We prepare atoms in a coherent superposition of internal states and study the time read-off via a Ramsey sequence after the tunneling process without the notion of classical trajectories or velocities. Our operational framework (i) unifies definitions of tunneling delay within one approach, (ii) connects the time to a frequency standard given by a conventional atomic clock that can be boosted by differential light shifts, and (iii) highlights that there exists no superluminal or instantaneous tunneling. |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Angewandte Physik 05 Fachbereich Physik > Institut für Angewandte Physik > Theorie kalter Quantengase, Quantenoptik, Technische Optik |
| Hinterlegungsdatum: | 23 Apr 2024 09:59 |
| Letzte Änderung: | 23 Apr 2024 09:59 |
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