Recent Publications

Breakdown of quantisation in a Hubbard-Thouless pump
Anne-Sophie Walter; Zijie Zhu; Marius Gächter; Joaquín Minguzzi; Stephan Roschinski; Kilian Sandholzer; Konrad Viebahn; Tilman Esslinger
Arxiv preprint 2204.06561 (2022)
ArXiv: 🔗 link
Topological pumping in a Floquet-Bloch band
Joaquín Minguzzi; Zijie Zhu; Kilian Sandholzer; Anne-Sophie Walter; Konrad Viebahn; Tilman Esslinger
Arxiv preprint 2112.12788 (2021)
ArXiv: 🔗 link
Self-oscillating geometric pump in a dissipative atom-cavity system
Davide Dreon; Alexander Baumgärtner; Xiangliang Li; Simon Hertlein; Tilman Esslinger; Tobias Donner
Arxiv preprint 2112.11502 (2021)
ArXiv: 🔗 link
Floquet engineering of individual band gaps in an optical lattice using a two-tone drive
Kilian Sandholzer; Anne-Sophie Walter; Joaquín Minguzzi; Zijie Zhu; Konrad Viebahn; Tilman Esslinger
Arxiv preprint 2110.08251 (2021)
ArXiv: 🔗 link
Long-range interacting quantum systems
Nicolò Defenu; Tobias Donner; Tommaso Macrì; Guido Pagano; Stefano Ruffo; Andrea Trombettoni
Arxiv preprint 2109.01063 (2021)
ArXiv: 🔗 link

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 Zürich, NCCR QSIT, SBFI QUIC and the European Union (ERC TransQ, ERC Marie Curie TopSpiD, ETN ColOpt).




25 April 2022
Talk by Leticia Tarruell on May 20, 2022
Leticia, an alumni of the QO group, will give a talk in the Condensed Matter Seminar Series of ETHZ.

11 April 2022
Kilian Sandholzer successfully defended his PhD thesis.

01 April 2022
Welcome Daniel
Daniel Ortuño started his semester project in the Lithium team. Welcome!

21 February 2022
Welcome Lisa, Samuel, Yuanning and Yixiao
Lisa Appel, Samuel Jele, Yuanning Chen and Yixiao Wang started their semester projects in the Lattice team. Welcome!

21 February 2022
Welcome Nathan
Nathan Baudis started his semester project in the Cavity team. Welcome!


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