Group Seminar at LMU & via Zoom: Towards spin squeezing in real clocks

May 11, 2022

Prof. Jakob Reichel, LKB Paris
Group Seminar at LMU & via video conference (Zoom)
Wednesday, May 11, 9:00 am (MEZ)

Due to the Covid-19 pandemic, the group seminar will be a hybrid event, allowing participants to attend the seminar virtually and in-person. This procedure enables us to continue our research, enhance discussions and exchange important information.


I will start by presenting recent results of a collaboration between my group at Laboratoire Kastler Brossel and SYRTE (the French time and frequency metrology lab), where we have produced spin squeezed states of ultracold Rb atoms in the platform of our trapped-atom clock on a chip (TACC). The lifetime of these states is on the order of one second, two orders of magnitude longer than all earlier Rb spin squeezing experiments, and compatible with typical Ramsey times in cold atom clocks. These long lifetimes also reveal surprising spin interaction effects that remained undetected in earlier experiments.

In the second part of my talk, I will describe a new, relatively simple and small Sr experiment designed for cavity QED with Sr atoms in a miniature ring resonator. The vacuum setup has a total length of 40cm including oven, Zeeman slower and glass cell, and routinely produces 2 10^7 87Sr atoms in the MOT with an oven temperature of 440°C.

If you would like to join our group seminar via Zoom, please contact us for more information.


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