Group Members

Group Photo (20/06/2019). From right to left: Guido Pupillo (Director), Thomas Botzung (PhD Student), Johannes Schachenmayer (CNRS Researcher), Andreas Geissler (Postdoc), Gaetan Parcebois (Master Student), Stefan Shutz (Postdoc), Nóra Sandór (Postdoc), David Wellnitz (PhdStudent), Yusuf Kasim (Student, crouched), Guido Masella (PhD Student)
Guido Pupillo
Director - Distinguished Full Professor

Guido Pupillo is Distinguished Full Professor (PRCE) at the University of Strasbourg, Director of the “Laboratory of Quantum Physics” at the Institut de Science et d'Ingénierie Supramoléculaires (ISIS) and of the new “European Center for Quantum Sciences - CESQ” of the University of Strasbourg and CNRS, where he is involved in the development of teaching and research programs in quantum science and technology. 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 Scientific Coordinator of the MSCA COFUND “QUSTEC – Quantum Science and Technologies at the European Campus” and Coordinator of the MSCA ITN “MOQS – Molecular Quantum Simulations”. He is recipient of several awards, including the 2012 ERC Starting Grant and the 2013 Guy Ourisson Prize. He is fellow of the Global Young Academy, the Young Academia Europaea. Since 2019 he is fellow of the University of Strasbourg Institute for Advanced Study (USIAS) and Senior Fellow of the Institut Universitaire de France (IUF). His research interests are in atomic, molecular, and optical physics, quantum simulations and quantum computing.

Keywords: Quantum simulation, quantum computing, many-body physics, quantum optics

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Johannes Schachenmayer
CNRS Researcher

I am a permanent CNRS researcher at CESQ/ISIS and joined the team in Strasbourg in 2016. After my undergraduate studies at the Technical University in Munich (TUM) 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.

My main research interest is the theory of quantum many-body non-equilibrium physics. I'm interested in far-from-equilibrium dynamics in many-body models, which I study by utilizing numerical methods and quantum optics tools [e.g.: matrix product states (MPS)/tensor networks, truncated Wigner approximations (DTWA), quantum trajectories, adiabatic elimination, ...]. Applications of my work are in the fields of (ultra-)cold atom physics and cavity-coupled molecules.

Keywords: Quantum many-body physics, Non-equilibrium, Numerical methods, Cold atoms, Cavity-coupled Molecules

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David Hagenmuller
CNRS Researcher
After a master degree in Orsay (France), I obtained a PhD in theoretical physics at université Paris-Diderot (thesis advisor Cristiano Ciuti) in 2012, where I developed a strong interest in cavity quantum electrodynamics applied to condensed-matter systems. I then moved to the university of Toronto to develop a project about photonic band gap materials in the ultra-strong coupling regime in collaboration with Sajeev John. As of 2015, I have been working in the Quantum Matter Theory Group at the University of Strasbourg as a post-doc, and since 2020 as a permanent CNRS researcher (chargé de recherche). I am still particularly interested in the interface between condensed-matter and cavity-QED, and typically investigate how basic properties such as electronic quantum phases and transport can be modified in the presence of strong light-matter interactions occurring in a cavity-type structure.
Keywords: Cavity-QED, Plasmonics, Superconductivity, Transport, Numerical methods (Non-Equilibrium Green's Functions).
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Guido Masella
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
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Francesco Mattiotti

I graduated from Università Cattolica del Sacro Cuore (Brescia, Italy) in 2016 focusing my studies on the interplay of cooperativity and thermal noise, from light-harvesting complexes to quantum devices. In 2021 I obtained a double Ph. D. degree in Physics from Università Cattolica del Sacro Cuore (Brescia, Italy) and University of Notre Dame (Indiana, USA) within the International Doctoral Program in Science. My research covered cooperative effects in quantum systems, with a particular focus on superradiance in molecular aggregates and solid state super-lattices, but also on long-range interactions and how they affect energy transport. In April 2021 I joined the Quantum Matter Theory group as a post-doc. I am interested in quantum systems strongly coupled to optical cavities, the interplay of cooperativity with disorder and noise and their implications on quantum transport, also in the context of many body physics. Keywords: Quantum Optics, Cavity QED, Many-body Physics, Cooperativity, Quantum Transport.
Keywords: Quantum Optics, Cavity QED, Many-body Physics, Cooperativity, Quantum Transport.

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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
Guillermo Preisser
Ph. D. Student
Guillermo joined the Quantum Matter Theory group in Strasbourg on February 2020 after graduating from the National Autonomous University of Mexico in 2019. He will work on semi-classical modeling of open quantum technology platforms.
Camille Le Calonnec
Ph.D. Student
I joined the Quantum Matter Group in September 2020 after having completed my first year of PhD in Alexandre Blais’s group at the Institut Quantique of the University of Sherbrooke in Canada. My main area of research is quantum computing in circuit QED. I am currently working on Floquet theory to treat exactly drives in superconducting circuits and especially for the purpose of parametric two-qubit gates. In addition to this ongoing project I am working on Quantum information processing for quantum simulations. In this project we will exploit ideas of ultra-cold atoms, quantum chemistry and superconducting quantum circuits to develop variational quantum algorithms tailored to current quantum devices. Notably, these quantum algorithms will be constructed from quantum gates available to current hardware rather than from idealized gates.
Keywords: Circuit QED, Floquet theory, quantum Simulation, Two-Qubit Gate, Variational Quantum Algorithm, Quantum Information Processing
Vineesha Srivastava
Ph. D. Student
I completed my studies in Engineering Physics (5-Yr Integrated Dual Degree B.Tech +M.Tech) from IIT(BHU) Varanasi, India in May, 2020. During my undergraduate study, I developed research interests in the field of Atomic Molecular and Optical Physics, Quantum Computation, and Quantum Optics. In my Master's project, I explored Quantum Machine Learning, mainly focusing on theoretical ideas for implementing ML algorithms for classical data using quantum systems to investigate the advantages of hybrid computation. I joined the Quantum Matter Theory group of Prof. Pupillo in December 2020. My goal is to investigate new theoretical ideas on the physical realisation of quantum simulators and devices, in particular with Rydberg atoms or spins / molecules coupled to the light modes of a cavity.
Keywords: Cavity QED, Quantum Gates, Rydberg Atoms
Sven Jandura
Ph.D. Student
I completed a Bachelor's degree in physics and in mathematics at the University of Munich, and a Master's degree in physics at ETH Zurich. During my studies I developed an interest in quantum information processing and quantum technologies. I joined the Quantum Matter Theory group in June 2021 and theoretically investigate quantum gates on Rydberg atoms. In particular, my research is focused on on multi-qubit-gates (three or more qubits) and how to implement them natively on Rydberg hardware without decomposing them into single and two qubit gates.