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News

25 Jun 2019

Konrad won ETH Fellowship

Konrad Viebahn was awarded an ETH Fellowship. Congratulations!

28 May 2019

Andrea and Joaquin won the VP award

Andrea and Joaquin won the experimental innovation award of the physics department for implementing a new MOT experiment in the Advanced Student Laboratory.

12 Apr 2019

Frederik Defended his PhD thesis

Frederik Görg successfully defended his PhD thesis. Congratulations!

22 Mar 2019

Martin defended his PhD thesis

Martin Lebrat successfully defended his PhD thesis. Congratulations!

Recently published

P-band induced self-organization and dynamics with repulsively driven ultracold atoms in an optical cavity, arXiv:1905.10377

Two-mode Dicke model from non-degenerate polarization modes, PRA 100, 013816 (2019)

Local spin manipulation of quantized atomic currents, arXiv:1902.05516

Dissipation Induced Structural Instability and Chiral Dynamics in a Quantum Gas, arXiv:1901.05974

Realisation of density-dependent Peierls phases to couple dynamical gauge fields to matter, arXiv:1812.05895 (2018)

Quantum simulation meets nonequilibrium DMFT: Analysis of a periodically driven, strongly correlated Fermi-Hubbard model, Arxiv:1811.12826 (2018)

Floquet Dynamics in Driven Fermi-Hubbard Systems, PRL 121, 23 (2018) and arXiv:1808.00506 (2018) 

Welcome to Prof. Tilman Esslinger's Quantum Optics Group

In our research we use ultracold atoms to synthetically create key models in quantum many-body physics.

The properties of the trapped quantum gases are governed by the interplay between atomic motion and a well characterized interaction between the particles. This conceptual simplicity is unique in experimental physics and provides a direct link between the experiment and the model describing the system. It enables us to shine new light on a wide range of fundamental phenomena and address open challenges.

We explore the physics of quantum phase transitions and crossovers, low-dimensional systems and non-equilibrium dynamics, and thereby establish the basis for quantum simulation of many-body Hamiltonians.

For example, by loading a quantum degenerate gas of potassium atoms into the periodic potential of an optical lattice we realize Hubbard models with atoms and access superfluid, metallic and Mott-insulating phases. A many-body system with infinitely long-range interactions is formed by trapping a Bose-Einstein condensate inside an optical cavity, which has allowed us to observe the Dicke quantum phase transition from a normal to a superradiant phase. We also work on extending the concepts of quantum simulations to device-like structures connected to atomic reservoirs, using a combination of high-resolution microscopy and transport measurements.

 

We acknowledge funding from SNF and ETH Zurich, NCCR QSIT, SBFI QUIC and the European Union (ERC TransQ, ERC Marie Curie TopSpiD, ETN ColOpt).