Condensed Matter Seminar Series |
Ilya Eremin
Ruhr-Universität Bochum
Superconducting quantum networks: frustration, long-range interaction, and PT symmetry
In my talk I will present some examples of superconducting quantum networks embedded in a dissipationless transmission line. I will concentrate on two examples: vertex-sharing frustrated Kagome lattice and 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. I will also discuss the realization of the PT-symmetric Hamiltonians based on superconducting qubits.