Coherent excitation of a \(\mu\)Hz scale optical magnetic quadrupole transition

We report on the coherent excitation of the ultranarrow \(^{1}\mathrm{S}_0\)-\(^{3}\mathrm{P}_2\) magnetic quadrupole transition in \(^{88}\mathrm{Sr}\). By confining atoms in a state insensitive optical lattice, we achieve excitation fractions of 97(1)% and observe linewidths as narrow as 58(1) Hz....

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Bibliographic Details
Published in:arXiv.org 2024-01
Main Authors: Klüsener, V, Pucher, S, Yankelev, D, Trautmann, J, Spriestersbach, F, Filin, D, Porsev, S G, Safronova, M S, Bloch, I, Blatt, S
Format: Article
Language:English
Subjects:
Atomic properties
Coherence
Excitation
Optical lattices
Quadrupoles
Quantum computing
Online Access:Get full text
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Summary:We report on the coherent excitation of the ultranarrow \(^{1}\mathrm{S}_0\)-\(^{3}\mathrm{P}_2\) magnetic quadrupole transition in \(^{88}\mathrm{Sr}\). By confining atoms in a state insensitive optical lattice, we achieve excitation fractions of 97(1)% and observe linewidths as narrow as 58(1) Hz. With Ramsey spectroscopy, we find coherence times of 14(1) ms, which can be extended to 266(36) ms using a spin-echo sequence. We determine the linewidth of the M2 transition to 24(7) \(\mu\)Hz, confirming longstanding theoretical predictions. These results establish an additional clock transition in strontium and pave the way for applications of the metastable \(^{3}\mathrm{P}_2\) state in quantum computing and quantum simulations.
ISSN:2331-8422
DOI:10.48550/arxiv.2401.03934