Blar i Institutt for fysikk på forfatter "Aase, Niels Henrik"
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Constrained s-wave weak-coupling superconductivity in multiband superconductors
Aase, Niels Henrik; Johnsen, Christian Svingen; Sudbø, Asle (Peer reviewed; Journal article, 2023)We consider superconductivity in a system with N Fermi surfaces, including intraband and interband effective electron-electron interactions. The effective interaction is described by an N × N matrix whose elements are ... -
Dominant superconducting correlations in a Luttinger liquid induced by spin fluctuations
Aase, Niels Henrik; Sudbø, Asle (Peer reviewed; Journal article, 2022)We study spin-fluctuation mediated divergent superconducting fluctuations in a Luttinger liquid proximity-coupled to a spin chain. Our study provides insight into how spin fluctuations can induce superconductivity in a ... -
Efficient Encoding of the Weighted MAX k-CUT on a Quantum Computer Using QAOA
Fuchs, Franz Georg; Kolden, Herman Øie; Aase, Niels Henrik; Sartor, Giorgio (Peer reviewed; Journal article, 2021)The weighted MAX k-CUT problem consists of finding a k-partition of a given weighted undirected graph G(V, E), such that the sum of the weights of the crossing edges is maximized. The problem is of particular interest as ... -
Multiband strong-coupling superconductors with spontaneously broken time-reversal symmetry
Aase, Niels Henrik; Mæland, Kristian; Sudbø, Asle (Peer reviewed; Journal article, 2023)We study superconducting three-band systems within strong-coupling Eliashberg theory. In particular, we search for phase-frustrated superconducting systems with spontaneous time-reversal symmetry breaking (TRSB) states. ... -
Slave-boson approach to the U=∞ Haldane-Hubbard model
Aase, Niels Henrik (Master thesis, 2021)I denne oppgaven studerer vi Haldane-Hubbard-modellen i grensetilfellet hvor Hubbard-frastøtning går mot uendelig. Fordi superledende ustabiliteter har blitt observert i lignende modeller, er det av spesiell interesse å ...