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Strontium Lab

Welcome to the Strontium Lab.
We study quantum many-body physics with ultracold
strontium atoms trapped in optical lattices.


Our paper Crossed optical cavities with large mode diameters was just published in Optics Letters.

As usual, the paper is also available on the Physics arXiv.


Florian Wallner just handed in his Master’s thesis, describing upgrades to our second-generation clock laser reference cavity system and how to interferometrically characterize our new high-resolution microscope objectives. Congratulations!


Eva Casotti just handed in her Master’s thesis, describing our the two-dimensional magneto-optical trap upgrade to our new strontium source. Congratulations!


We report on an optical assembly that lets us generate two-dimensional optical lattices based on laser beams with mode diameters approaching 1 mm. Such large mode diameters are beneficial to increase the homogeneity of the microtraps created by the two standing waves. Although we specifically designed this assembly to benefit quantum simulators using strontium atoms, we believe that it has much wider applicability. We achieve our aim of creating large mode diameters without using any adjustable parts or chemical bonding agents. The assembly process builds on construction techniques used in laser reference cavities, but extends them to two dimensions and into the near plane-parallel regime. In our compact device, we use two flat mirrors and two mirrors with a curved surface that is less than 1 micrometer deep. The monolithic construction of our assembly makes it compatible with ultrahigh vacua. Its high mechanical and thermal stability makes the assembly uniquely suited for inclusion in any transportable atomic clock or sensor, in particular for space missions.

Have a look at our preprint on the Physics arXiv.


Neven just finished his Marie-Curie postdoc with us and is starting his own Strontium lab at the Institute of Physics in Zagreb, Croatia!


Yilong Yang just joined our group as a Master student. Welcome Yilong!


Dimtrios Tsevas just joined our group as a Master student. Welcome Dimitris!


André just defended his PhD thesis with flying colors and is shown on the left wearing a giant cavity as a doctor's hat! Congratulations André!


Our paper State-Dependent Optical Lattices for the Strontium Optical Qubit was just published in Physical Review Letters.

As usual, the paper is also available on the Physics arXiv.


Sebastian will start teaching the Quantum Optics II class at LMU starting Monday, April 20th. Because of the COVID-19 pandemic, classes will be held via video conference until further notice. Please register for the class via the LMU portal LSF. We meet Mondays and Wednesdays from 12:15 to 14:00 via Zoom. Find out more about the class on the group webpage.