Coherent excitation of a $\mu$Hz scale optical magnetic quadrupole transition
| Autor: | Klüsener, V., Pucher, S., Yankelev, D., Trautmann, J., Spriestersbach, F., Filin, D., Porsev, S. G., Safronova, M. S., Bloch, I., Blatt, S. |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Physical Review Letters 132, 253201 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.132.253201 |
| Popis: | 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. Comment: 6 pages, 4 figures, 5 pages supplemental material |
| Databáze: | arXiv |
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