Group Members

Guido Pupillo
Director - Distinguished Full Professor

Guido Pupillo is Distinguished Full Professor (PRCE) at the University of Strasbourg (UNISTRA), Director of the “Laboratory of Quantum Physics” at the Institut de Science et d'Ingénierie Supramoléculaires (ISIS) and of the group "Gaz Quantiques et Optique Quantique" at the Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), where he is involved in the development of teaching and research programs in quantum science and technology. He is fellow of the Global Young Academy and of the Young Academia Europaea. He obtained his Master in Physics at the University of Bologna in 2001 and a PhD in Physics in 2005 at the University of Maryland for research conducted at the National Institute of Standards and Technology (with Dr. Carl J. Williams). Until 2011 he was scientist and then senior scientist at the University of Innsbruck and the Austrian Academy of Sciences, where he obtained his Habilitiation in Theoretical Physics (with Prof. P. Zoller). In 2012 he became full professor at the University of Strasbourg (FR). He is recipient of several awards, including the 2012 ERC Starting Grant and the 2013 Guy Ourisson Prize. His research interests are in atomic, molecular, and optical physics, many-body physics and non-equilibrium dynamics of open quantum systems.

Keywords: Cold gases, many-body physics, quantum optics

Google ScholarWebpage ISIS
Johannes Schachenmayer
CNRS Researcher

During my physics studies at the Technical University in Munich (TUM) I developed a strong interest in the theory of quantum many-body dynamics. Driven by this interest, already for my diploma work I moved to Innsbruck (Austria) where I continued with a PhD program in the group of P. Zoller, supervised by A. J. Daley. During my PhD years I moved to the University of Pittsburgh (USA) as a visiting research scholar until graduation in 2012. I stayed in the US, working as a post-doc at JILA (Boulder, USA) in the group of A. M. Rey. In 2016 I joined the quantum matter theory group as permanent CNRS researcher (chargé de recherche) at the IPCMS. My research interest is centered around numerical approaches to non-equilibrium dynamics of quantum many-body models (utilizing e.g. time-dependent DMRG/matrix product states, or semi-classical phase-space methods). In particular, I'm interested in the dynamics of setups with (ultra-)cold atoms and associated quantum effects such as entanglement build-up. Furthermore, my recent research is focused on open system/quantum optics approaches (involving e.g. cavity couplings) to molecular arrangements and condensed matter systems.

Keywords: Numerical methods (t-DMRG/DTWA), Many-body quantum dynamics, Ultracold quantum gases, Optical lattices, Strong cavity-coupling

Google Scholar
David Hagenmuller
Postdoc
After a master degree in Orsay (France) in condensed-matter physics, I did a PhD in theoretical physics at Université Paris-Diderot (thesis advisor Cristiano Ciuti) on quantum Hall systems in the ultrastrong light-matter coupling regime. I then moved to Canada in the group of Sajeev John (UofT) where I have worked on the possibility to achieve a new ultrastrong coupling regime with large cooperativities using photonic band gap materials. Since 2015, I am working in the group of Guido Pupillo at the University of Strasbourg. I am particularly interested in studying how one can modify the properties of condensed-matter systems by coupling them to a cavity-type structure in its vacuum state. These include for instance charge/exciton transport in molecular ensembles and electron-phonon coupling/superconductivity.
Keywords: Cavity-QED, Strong light-matter interactions, Electron-phonon coupling, Superconductivity.
Curriculum Vitae
Google Scholar
Stefan Schütz
Postdoc
After my PhD research at Saarland University, in the theoretical quantum physics group of Giovanna Morigi, I joined Guido Pupillo‘s group in October 2016. My focus lies on the studies of open quantum systems in the framework of Quantum Master Equations in order to describe effective interactions that are mediated by auxiliary systems, e.g. confined light fields. Its presence can, for instance, induce collective dissipative processes and alter transport properties. Such effects open the way to modify properties of light and matter in a desired manner.
Keywords: Quantum Master Equation, light-matter interactions, effective coherent and dissipative couplings
Andreas Geißler
Postdoc
Already in my undergraduate studies, I have been strongly interested in the theoretical analysis of strongly correlated many particle quantum systems. Up to my master’s thesis the focus has mainly been on condensed matter systems – with a short detour into classical field theory as applied to the study of orientation maps in the primary visual cortex. Throughout my doctorate research, I have investigated the possibility of supersolidity in strongly correlated Rydberg quantum gases. Now as a research fellow, I am working on the characterization of the many-body localization transition using operator based methods. The overarching motif of my research is the development of efficient many-body methods to crack their associated exponential complexity.
Keywords: Numerical Many-Body Methods, Ultracold Quantum Gases, Many-Body Localization
Curriculum Vitae
Nóra Katalin Sandór
Postdoc
Google Scholar
Thomas Botzung
Ph. D. Student
I did a master in condensed matter and nanophysics at the University of Strasbourg in 2016, then I have started a Ph. D. in the group of Professor Guido Pupillo. The purpose of the doctorate is to study one-dimensional strongly correlated systems by using state of the art numerical techniques. In particular, I am interested to understand how long-range interactions can give rise to new exotic phases of matter.
Keywords: Many-Body Physics, Strongly correlated electrons
Curriculum Vitae
Guido Masella
Ph. D. Student
I graduated from the University of Pisa in 2015 focusing my studies on simulations of non-equilibrium dynamics of cold atomic gases. After a short post graduate training at CNR-INO (Italy) working on an experiment involving dipolar quantum Gases of Dysprosium atoms, in February 2017 I started my Ph. D. at University of Strasbourg on the study of "Exotic Phsenomena in Cold Atomic Gases"". My research interests include the study of equilibrium and non-equilibrium phenomena in ultracold atomic gases and in general in systems of interest for condensed matter and atomic physics. I am deeply interested in the computational challenges related to these problems, in the study and in the development of numerical tools and methods capable of tackling efficiently these problems.
Keywords: Computational Physics, Many-body Physics, Cold Gases
Curriculum Vitae
Google Scholar
David Wellnitz
Ph. D. Student
From 2013 to 2018, I studied physics in Heidelberg. In 2018, I wrote my Master thesis in the group of Professor Weidemüller on the application of network theory to atomic spectra. In November 2018, I have started my PhD in physics in the group of Professor Pupillo in Strasbourg. Here, I am analyzing how methods of quantum optics can influence chemistry. I am particularly interested in the collective dynamics arising due to collective light matter coupling.
Keywords: Quantum Optics, Cavity QED, Many-body Physics.
Curriculum Vitae