报告题目：Superconducting quantum networks: frustration, long-range interaction, and PT symmetry
摘要：
Superconducting quantum circuits based on Josephson junction (JJ) arrays turned out to be excellent experimental platforms to simulate static and dynamical phenomena of quantum many-body systems. In my talk I will present some novel examples of superconducting quantum networks embedded in a dissipationless transmission line. I will concentrate on two different developments: first one refers to study JJ arrays with frustrated geometry like vertex-sharing frustrated Kagome lattice or frustrated saw-tooth chains composed of Josephson junctions. The frustration is provided by periodically arranged 0- and π- Josephson junctions. We will derive effective Ising-type spin Hamiltonian with strongly anisotropic long-range interaction and discuss quantum and classical phases of these models. In the second part of my talk I will show how JJ arrays are used for realization of the PT-symmetric Hamiltonians and analyze novel phase transitions that occur in this case.
简 历：
Employment and Experience
2000 - 2000 Visiting scientist at the Max Planck Institute for Physics of Complex Systems in Dresden (research group Prof. Dr. Fulde, "Strong Electron Correlations")
2000 - 2002 Alexander von Humboldt Research Fellowship at the Institute for Theoretical Physics at Freie Universität Berlin
2002 - 2005 Research associate at the Institute for Theoretical Physics at the Free University of Berlin (research group Prof. F. von Oppen / Prof. K.-H. Bennemann)
2005 - 2010 Junior Professor (W1) at the Max Planck Institute for Physics of Complex Systems in Dresden & Technical University Carolo-Wilhelmina in Braunschweig
2010 - 2020 Professor (W2) at the Institute for Theoretical Physics III, Ruhr University Bochum
since 02/2020 Professor (W3) at the Institute for Theoretical Physics III, Ruhr University Bochum
Research Interests Physics research and education in general field of quantum many-body theory and its application in condensed matter and related systems. My particular interests are related to the investigation of strongly correlated low dimensional electronic and magnetic systems, unconventional superconductivity, non-equilibrium phenomena, topological field theories in topological insulators and novel states of matter forming at the interfaces.