LMULMUSiemens Stiftung

Welcome to the Laser Spectroscopy Group!

Our group performs experiments on quantum physics of ultracold atoms, high resolution laser spectroscopy of single trapped ions and antimatter spectroscopy.
We are located at the LMU University of Munich and at the Max-Planck Institute of Quantum Optics in Garching.

Latest News of our Group

All Group News

“I try to contribute ideas and motivate”
Thomas Udem is a professor at LMU Munich and one of the longest-serving members of the laser spectroscopy research group led by Nobel prize winner Theodor Hänsch.
The next phase of the proton radius puzzle
Physicists at the Max Planck Institute of Quantum Optics have tested quantum mechanics to a completely new level of precision using hydrogen spectroscopy, and in doing so they came much closer to solving the well-known proton charge radius puzzle.
How big is the alpha particle? Laser spectroscopy provides new results with record precision
The size of the alpha particle, the nucleus of the helium atom, has been measured more accurately than ever before. Results now indicate a size 1.67824(83) femtometers, which is 4.8 times more precise than previous measurements.
Not all cats are grey in the dark!
Our eyes are sensitive to only three spectral color bands (red, green, blue), and we all know that we can no longer distinguish colors if it becomes very dark. Spectroscopists can identify many more colors by the frequencies of the light waves, so that they can distinguish atoms and molecules by their spectral fingerprints.
Gentner-Kastler Prize 2021 for Nathalie Picqué
The DPG awards Nathalie Picqué with the 2021 Gentner-Kastler Prize for outstanding contributions to high-resolution broad-field molecular spectroscopy with frequency combs.
Alexey Grinin Promotion

Alexey Grinin Promotion

January 27, 2021
Alexey successfully defended his PhD thesis
September 2023
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