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Prof. Dr. Jean-Sébastien Caux | | |
The research focus of my group is the physics of strongly-interacting many-body quantum systems including cold atomic gases, quantum spin systems, quantum dots and quantum wires. Focusing on one-dimensional quantum models, the overall goal is to develop new nonperturbative theoreticals methods for the calculation of experimentally relevant quantities, in equilibrium as well as out-of-equilibrium situations. In equilibrium, our main business is to compute physically observable dynamical correlation functions (by combining analytical work, the ABACUS algorithm and numerical renormalization) and to use these results for describing experiments on spin chains (inelastic neutron scattering) and cold atomic gases (Bragg spectroscopy). For out-of-equilibrium settings, we build on the Quench Action method to reconstruct the full post-quench time evolution of interacting models subjected to a quantum quench, thereby revealing fundamental insights into many-body relaxation, equilibration and (lack of) thermalization. Our long-term goal is to extend the reach of our methods to continuously-driven situations, in particular to Floquet-driven systems.
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| | Dr. Vladimir Gritsev |
| Current research in my group is related to three main directions: 1) non-ergodic states of matter and ergodic to non-ergodic transitions; 2) non-equilibrium dynamics in isolated and driven-dissipative quantum many-body systems with particular focus on nonequilibrium phase transitions; 3) application of ideas of quantum geometry to equilibrium and non-equilibrium phases and phase transitions. We use a broad spectrum of theoretical tools, including random matrix theory, integrable models, field theory, algebraic methods and numerics.
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Dr. Arghavan Safavi Naini | | |
The research in my group is centered around applications of experimentally realizable quantum many-body systems, in particular their out-of-equilibrium dynamics, to quantum simulation, quantum computation and quantum enhanced metrology. I am interested in utilizing various quantum simulation platforms, including trapped-ions, Rydberg atoms, and polar molecules, to study the interplay between interactions, dimensionality, and disorder with regards to transport, thermalization, and propagation of quantum information. To this end my group utilizes extensive numerical simulations and analytic approaches to fully characterize the quantum simulation platforms. On the more applied front, we use engineered interactions in trapped-ion quantum simulators and cavity QED systems, to generate highly entangled states with application to quantum enhanced metrology. My research is closely related to the topics pursued at QuSoft, as well as the experimental efforts at UvA.
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| | Dr. Philippe Corboz |
| The research in my group is centered around the development and application of computational methods for the study of quantum many-body problems, with a particular focus on 2D tensor network methods applied to frustrated spin and strongly correlated electron systems. On the methods side we work on the further development of tensor network algorithms for ground state calculations, as well as their generalization to finite temperature, excitations, 3D, and systems with topological order. Examples on the application side include effective spin models relevant for frustrated materials (e.g. SrCu2(BO3)2) under pressure and in a magnetic field), one-band and multi-band 2D Hubbard models in the context of the cuprate high Tc superconductors, and SU(N) models relevant for experiments on ultra-cold alkaline-earth atoms in optical lattices.
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Prof. Dr. Kareljan Schoutens | | |
My research has a broad focus on quantum many-body theory and, increasingly, quantum computation, quantum simulation and quantum control of multi-qubit quantum registers. The latter topics are pursued together with QuSoft, the research center of Quantum Software. A long term interest are topological phases of matter as realised in fractional quantum Hall systems and cold atomic matter, non-Abelian braid statistics and topological quantum computation. We continue to explore and exploit the role of symmetries in the analysis of quantum many body system, with supersymmetry in lattice models (introduced at ITFA in 2003) as a prime example.
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| | Dr. Jasper van Wezel |
| The research in my group revolves around emergence in condensed matter theory, organised along three central themes. The first is the emergence of novel phases of matter, particularly novel types of charge and orbital order in correlated low-dimensional materials. Recently, this has resulted for example in the identification of an excitonic insulator phase in TiSe2 and combined orbital-charge order in elemental chalcogens as well as various transition-metal dichalcogenides. We also study the influence of symmetries and conservation laws on topological phases of matter in both quantum materials and classical mechanical metamaterials. Here, we recently classified topological phases in the presence of lattice symmetries, and are currently exploring possible topologies of non-Hermitian setups. Finally, we investigate the dynamics of classical physics arising from quantum mechanics, based on ideas of spontaneous symmetry breaking and emergence in quantum matter.
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