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Úterý, 19.11.2019 15:00

Daria Medvedeva (Department of Condensed Matter Theory, FZÚ AV ČR, v.v.i.)

Abstract: Systems with 3d-transition metals can be perfectly described by the lattice Hubbard model [1], which can be solved by the Dynamical Mean-Field Theory (DMFT) [2]. In that case we suggest, that the interactions between electrons are only on the site of the lattice. But, according to recent studies [3], it was found there are strongly correlated systems, in which interactions between sites cannot be neglected. In that case it is necessary to solve the Extended Hubbard model [3] to obtain more realistic description of the material. One can do it using the Extended...

Úterý, 26.11.2019 10:00

Gorm Olle Steffensen (Niels Bohr Institute, Copenhagen)

Abstract: Progress in microfabrication has allowed fabrication of highly tuneable semiconductor-superconductor heterostructures yielding new platforms to both create and manipulate subgap states. Such bound states, isolated in energy by the superconducting gap, are important building blocks for many schemes of quantum computation. In this talk I will present how bound states arise in Quantum Dot-Superconductor systems, how we can model them and what we can learn from transport measurements. Finally, I will address the complexity in experiments with double quantum dots and the physics it...

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