Mainz 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 53: Poster: Quantum Optics and Photonics III
Q 53.42: Poster
Donnerstag, 9. März 2017, 17:00–19:00, P OG2
Realization of magnesium optical lattice clock — •Nandan Jha, Dominika Fim, Klaus Zipfel, Steffen Rühmann, Steffen Sauer, Waldemar Friesen, Wolfgang Ertmer, and Ernst Rasel — Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten-1, 30167 Hannover, Germany
Optical lattice clocks have already reached performance levels better than the best Cs fountain clocks. Magnesium with a high-Q 1S0 → 3P0 optical transition and a small black body radiation shift is a promising candidate for an optical frequency standard. We present the progress towards the realization of such an optical lattice clock on the dipole forbidden 1S0 → 3P0 transition of bosonic 24Mg. The precision of our previous spectroscopy measurements of the 1S0 → 3P0 clock transition [1] was limited by the line broadening (order of 10’s of kHz) due to tunneling in the relatively shallow optical lattice, and spatial inhomogeneity of the magnetic field used to induce mixing between 3P0 and 3P1 states. We overcome these limitations by going to deeper lattice potential and hence reducing the atomic tunneling between the lattice sites. Further improvements in magnetic field stability and clock laser frequency distribution have allowed us to reduce the linewidth of the clock transition to around 100 Hz. This higher Q-factor enables a more precise measurement of the magic wavelength and the other systematic shifts.
[1] A. Kulosa et al., Phys. Rev. Lett. 115, 240801 (2015).