Multi-ion Frequency Reference Using Dynamical Decoupling

verfasst von
Lennart Pelzer, Kai Dietze, Víctor José Martínez-Lahuerta, Ludwig Krinner, Johannes Kramer, Fabian Dawel, Nicolas C.H. Spethmann, Klemens Hammerer, Piet O. Schmidt
Abstract

We present the experimental realization of a continuous dynamical decoupling scheme which suppresses leading frequency shifts in a multi-ion frequency reference based on Ca+40. By near-resonant magnetic coupling of the S21/2 and D25/2 Zeeman sublevels using radio-frequency dressing fields, engineered transitions with reduced sensitivity to magnetic-field fluctuations are obtained. A second stage detuned dressing field reduces the influence of amplitude noise in the first stage driving fields and decreases 2nd-rank tensor shifts, such as the electric quadrupole shift. Suppression of the quadratic dependence of the quadrupole shift to 3(2) mHz/μm2 and coherence times of 290(20) ms on the optical transition are demonstrated even within a laboratory environment with significant magnetic field noise. Besides removing inhomogeneous line shifts in multi-ion clocks, the demonstrated dynamical decoupling technique may find applications in quantum computing and simulation with trapped ions by a tailored design of decoherence-free subspaces.

Organisationseinheit(en)
Institut für Quantenoptik
Institut für Theoretische Physik
Externe Organisation(en)
Physikalisch-Technische Bundesanstalt (PTB)
Typ
Artikel
Journal
Physical review letters
Band
133
ISSN
0031-9007
Publikationsdatum
19.07.2024
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Allgemeine Physik und Astronomie
Elektronische Version(en)
https://doi.org/10.48550/arXiv.2311.13736 (Zugang: Offen)
https://doi.org/10.1103/PhysRevLett.133.033203 (Zugang: Offen)