News

15 Jan 2019

Rodrigo joins the group

Rodrigo Rosa-Medina started his PhD in the Cavity team. Welcome!

7 Jan 2019

Anne-Sophie joins the group

Anne-Sophie Walter started her PhD in the Lattice team. Welcome!

9 Nov 2018

Frederik wins best contributed talk prize!

Frederik Görg won the award for best contributed talk at the workshop advances in quantum simulations with ultracold atoms. Congratulations!

5 Nov 2018

Konrad joins the group

Konrad Viebahn started his postdoc in the Lattice team. Welcome!

15 Oct 2018

Francesco joins the group

Francesco Ferri started his postdoc in the Cavity team. Welcome!

1 Oct 2018

Jeff starts his PhD

Jeffrey Mohan started his PhD in the Lithium team. Good luck!

27 Jul 2018

Philip wins poster prize!

Philip Zupancic won the IOP poster price at ICAP 2018. Congratulations!

Recently published

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) 

Coupling two order parameters in a quantum gas. Nature materials, 17, 686690 (2018  and arxiv:1711.07988. See also the press release.

Formation of a spin texture in a quantum gas coupled to a cavity, arXiv:1803.01803 (2018)

Breakdown of the Wiedemann-Franz law in a unitary Fermi gas, PNAS 115, no. 34 8563-8568 (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).