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12. März 2018
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Topological phases The study of topological properties of matter is a relatively new, but fast developing field of research in condensed matter physics. The fact that the recent Nobel Prize in Physics was awarded to D. J. Thouless, F. D. M. Haldane and J. M. Kosterlitz (2016) for theoretical dis...
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12. März 2018
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Exotic phases Superfluidity and Bose-Einstein Condensation (BEC) are very unusual and interesting phenomena. When a system of many bosons is brought to extremely low temperatures the atoms stop behaving as individual particles and start forming a macroscopic wavefunction. Effectively a large fra...
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12. März 2018
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Dissipative processes In many-body physics a lot of attention is given to properties of matter in thermal equilibrium with some external reservoir. However, while this is a vast and interesting field in itself, it is far from covering all possible topics. Firstly, even though we can access infor...
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12. März 2018
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Spectral properties
In order to understand the behaviour of a many-particle system it is useful to understand how a single particle is affected on average. To do this one can calculate or measure spectral functions. These quantities provide information about how much energy is needed to, e.g...
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18. März 2018
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Transport and dynamics in nanostructures We are interested in transport in nanostructures. The effects of the surrounding (conduction band) electrons or the (bosonic) excitations of the very small structures in these systems are usually described by quantum impurity models. Here the small struct...
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19. März 2018
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Dipolar gases Recently in the field of ultracold atom physics, systems made up of ultracold atoms or molecules with large dipole-dipole interactions attracted considerable interests. Dipole-dipole interactions can either originate from magnetic dipole moments of the atoms, which are of the order...
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19. März 2018
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Disordered systems The physics of solids that are interacting and, at the same time, disordered are currently of general interest in solid-state physics. Mainly, this is due to the fact that most real materials exhibit both features. Essentially, in these systems two major phenomena are brough...
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19. März 2018
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Multispecies bosonic gases Experimental progresses in ultra-cold quantum gases has brought also some new quantum systems in which the correlation effects are very visible. Amonge these systems, there are mixtures of different types of gases. Bose-Bose mixtures are succesful examples. These mixtu...
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12. März 2018
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The Numerical Renormalization Group (NRG) method is a non-perturbative numerical method which can be applied to various quantum impurity problems. Quantum impurity problems are defined as problems, where a small system with few degrees of freedom (the "impurity") interacts with a very large syst...
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13. September 2021
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Current research
Topological states
Multiflavor Fermi gases
Bose-Fermi mixtures
Dynamics in ultracold gases
Transport and dynamics in nanostructures
Dipolar gases
Disordered systems
Multispecies bosonic gases
Inhomogeneous gases
Hybrid ato...
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18. März 2018
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Topological states
Since the experimental realization of synthetic gauge fields for neutral atoms, the simulation of topologically non-trivial phases of matter with ultra-cold atoms has become a major focus of cold atom experiments [1]. They may even be generalized to simulate spin-orbit coupl...
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12. März 2018
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Multiflavor Fermi gases Cold atoms loaded in optical lattices provide us with an excellent tool to study prototypical model of condensed matter, like e.g. the Hubbard model, and in recent years remarkable progress has been achieved in the realization of the Hubbard Hamiltonian loading two hype...
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18. März 2018
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Bose-Fermi Mixtures Ultracold atomic gases provide a very powerful tool to study prototypical model of condensed matter like the Hubbard model.On the other hand what is often less understood is that they also provide the possibility of studying systems or regime which have no analogous in conden...
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19. März 2018
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Dynamics in ultracold gases Ultra cold gases in optical lattices provide a powerful system for experimental investigations of interacting quantum many body systems. Due to tunable intra- and interspecies interactions, degenerate quantum gases give insight into strongly and weakly correlated regi...
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13. September 2021
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Methods
Dynamical Mean-Field Theory
Gutzwiller Approach
Numerical Renormalization Group
MethodsMethods
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12. März 2018
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The dynamical mean-field theory (DMFT) is a non-perturbative approach which has been developed during nineties in the context of strongly correlated electronic systems and nowadays is quite successfully implied to describe many physical features of strongly correlated systems, mainly in connecti...
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12. März 2018
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Nowadays ultracold quantum gases act as a playground for many types of many-body interacting system. A very high-interest issue for all of these systems is their dynamics; how the system evolve its property in time. For the case of strongly interacting systems, this is very complex problem to ad...
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03. Februar 2021
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PublicationPublication
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16. Januar 2019
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03. Januar 2021
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Forschung
© 2020 CERN
Die Arbeitsgruppe beschäftigt sich mit der Auswertung von Messungen des ALICE-Experiments, einem der vier großen Experimente am CERN-LHC.
Wesentliches Ziel des Experiments ist die präzise Charakterisierung des sogenannten Quark-Gluon-Plasmas, eines Zustands der Mat...