Quantum Optics Lab

Treutlein Group


Welcome to the quantum optics lab

We explore fundamental quantum physics with atoms, photons and phonons and harness it for applications in quantum metrology and quantum information. In our experiments we study many-particle entanglement in Bose-Einstein condensates and develop quantum interfaces between atoms and solid-state nanosystems such as mechanical oscillators and semiconductor quantum dots. Our research combines experiment with theory, employing techniques of laser cooling, atom chips, optomechanics, and nanofabrication. A common goal of our activities is to investigate quantum physics in systems of increasing size and complexity.


News from the lab

Light-mediated strong coupling between a mechanical oscillator and atomic spins one meter apart

Engineering strong Hamiltonian interactions between quantum systems is usually only possible over short distances. We demonstrate a new scheme for long-distance interactions mediated by light and use it for a range of experiments in hybrid atom-optomechanics. This opens up many opportunities for quantum control and coherent feedback in quantum networks and metrology. See our paper in Science.

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Basel Quantum Metrology and Sensing Conference

The Basel Quantum Metrology and Sensing Conference (BQMS 2020) will highlight the state of the art and most recent advances in quantum sensing and quantum metrology with atomic and solid-state spin systems. It will gather key global players in these fields and focus on both fundamental research and engineering.

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Matteo Fadel wins Prix Schläfli 2019

Congratulations to Matteo Fadel, who was awarded a Prix Schläfli of 2019 by the Swiss Academy of Science for an excellent dissertation in the natural sciences. The Prix Schläfli was first awarded in 1866. Since then 104 young talents in different natural science disciplines have been distinguished. You can read Matteo's dissertation here.

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Congratulations to the winners of the Ehrenfest award

For their paper Bell Correlations in a Bose-Einstein Condensate, Roman Schmied, Jean-Daniel Bancal, Baptiste Allard, Matteo Fadel, Valerio Scarani, Philipp Treutlein and Nicolas Sangouard have won the Paul Ehrenfest best paper award for quantum foundations 2017. Pictured (left to right) are Philipp, Jean-Daniel, Matteo, Nicolas, and Roman at the award ceremony in Vienna earlier today.

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Review article on entanglement and quantum metrology with atomic ensembles

Have a look at our new review article on "Non-classical states of atomic ensembles: fundamentals and applications in quantum metrology", a joint work of L. Pezzè, A. Smerzi, M. K. Oberthaler, R. Schmied and P. Treutlein. Now published in Rev. Mod. Phys. 90, 035005 (2018).

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