Welcome to the quantum optics lab
We explore fundamental quantum physics with atoms, photons and phonons and harness it for applications in quantum technology. In our experiments we study many-particle entanglement in Bose-Einstein condensates, explore hybrid atom-optomechanical systems, and develop quantum memories and sensors with atomic vapour cells. Our research combines experiment with theory, employing techniques of atomic physics, quantum optics and optomechanics. A common goal of our activities is to investigate quantum physics in systems of increasing size and complexity.
News from the lab
Bell correlations in a Bose-Einstein condensate
The strongest form of correlations between particles are those that violate a Bell inequality. We have detected such Bell correlations between 480 atoms in a Bose-Einstein condensate, using a witness inequality that we derived in…
Marie Skłodowska-Curie Fellowship
Dr. Janik Wolters was awarded a Marie-Skłodowska-Curie Fellowship from the European Commission for the project "Cold atom-semiconductor quantum interface" - congratulations! We thank the European Union for the generous support and hope that…
European Research Council (ERC) Starting Grant
The European Research Council has awarded a Starting Grant to Prof. Philipp Treutlein for the project "Modular mechanical-atomic quantum systems", which is scheduled to start in early 2016. We thank the European Union for generously…
Widefield Microwave Imaging in Alkali Vapor Cells With Sub-100 μm Resolution
We record images of microwave fields with sub-100 μm resolution using a microfabricated alkali vapor cell. The setup can additionally image dc magnetic fields, and can be configured to image microwave electric fields. Our technique could…
An Artificial Rubidium Atom in a Semiconductor
In collaboration with the Warburton group, we have developed a semiconductor quantum dot single photon source that emits transform-limited photons at 780 nm, the wavelength of the Rubidium D2 line. The quantum dot photons are tuned into…