The leading superconducting instabilities of the two-dimensional extended repulsive one-
band Hubbard model within spin-fluctuation pairing theory depend sensitively on electron …

We use strong-coupling Eliashberg theory to study the competition of separate
superconducting orders at low temperatures. Specifically, we study magnon-mediated …

We compute the diagrammatic expansion of the particle-particle susceptibility via algorithmic
Matsubara integration and compute the correlated pairing susceptibility in the …

In 1965 Kohn and Luttinger proposed a genuine electronic mechanism for
superconductivity. Despite the bare electrostatic interaction between two electrons being …

We study photoinduced dynamics triggered by an inhomogeneity due to competition
between charge density waves (CDWs) and superconductivity. As a simple example, we …

Solid materials where quantum mechanical effects dominate the behavior can contribute to
faster and more energy-efficient computers. The road to technological application starts with …

The ground states of different Hubbard Hamiltonians are investigated with tensor networks
by placing them on cylinders and helices. The way these effective Hamiltonians can be …

Superconductivity and magnetism are fascinating fields in condensed matter physics giving
rise to exotic and puzzling phases of matter. In this thesis we explore three different topics: in …