6 papers
Non-identical anyonic algebras from compact-field quantum geometry
O. Kashuba, R. Mummadavarapu, R. -P. Riwar
Compact scalar field theories on lattices are capable of describing a large class of many-body systems, such as interacting bosons, superconducting circuit networks, spin systems a…
On-demand analog space-time in superconducting networks: grey holes, dynamical instability and exceptional points
Mohammad Atif Javed, Daniel Kruti, Ahmed Kenawy +4
There has been considerable effort to mimic analog black holes and wormholes in solid state systems. Lattice realizations in particular present specific challenges. One of those is…
Consistent quantum treatments of non-convex kinetic energies
C. Koliofoti, M. A. Javed, R. -P. Riwar
The task of finding a consistent relationship between a quantum Hamiltonian and a classical Lagrangian is of utmost importance for basic, but ubiquitous techniques like canonical q…
Frustrated Frustration of Arrays with Four-Terminal Nb-Pt-Nb Josephson Junctions
Justus Teller, Christian Schäfer, Kristof Moors +6
We study the frustration pattern of a square lattice with in-situ fabricated Nb-Pt-Nb four-terminal Josephson junctions. The four-terminal geometry gives rise to a checker board pa…
Interplay between evanescent scattering modes and finite dispersion in superconducting junctions
Daniel Kruti, Roman-Pascal Riwar
Superconducting junctions are essential building blocks for quantum hardware, and their fundamental behaviour remains a highly active research field. The behaviour of generic junct…
Limitations of Caldeira-Leggett model for description of phase transitions in superconducting circuits
O. Kashuba, R. -P. Riwar
The inherent complexity of system-bath interactions often requires making critical approximations, which we here show to have a radical influence on the renormalization group flow…