The Faculty of Mathematics and Natural Sciences: Search
Now showing items 1-10 of 30
External Control of Many-Body Quantum Systems
(2021-10-05)
In strongly correlated many-body quantum systems, the complex interplay between a large number of degrees of freedom and the presence of various competing energy scales leads to rich phase diagrams, but also renders these ...
The Hubbard Model on the Honeycomb Lattice with Hybrid Monte Carlo
(2021-11-09)
We take advantage of recent improvements in the grand canonical Hybrid Monte Carlo (HMC) algorithm, to perform a precision study of the single-particle gap in the hexagonal Hubbard model, with on-site electron-electron ...
Fluctuations and dissipation in a Bose-Einstein condensed photon gas
(2021-12-02)
Bose-Einstein condensation, superfluidity and superconductivity are all related phenomena where particles behave as collective quantum systems. The behavior of such systems is treated using quantum statistics and their ...
Abbildung und farbtonbasierte Analyse ausgedehnter neuronaler Strukturen
(2021-08-03)
Der Hippocampus ist eine Gehirnregion im mittleren Temporallappen, welcher für die Formung des expliziten Gedächtnisses zuständig ist. Lange Zeit galt der Dentatus Gyrus (DG), eine Region im Hippocampus, als “Eingang“ für ...
Design and Development of Depleted Monolithic Active Pixel Sensors with Small Collection Electrode for High-Radiation Applications
(2021-09-27)
Depleted monolithic active pixel sensors (DMAPS) have emerged as a low material and low cost alternative to the established hybrid technology. In this thesis, two large scale prototype chips that feature a fast column-drain ...
From star formation to regional distribution: Influences on the embedded cluster mass function
(2021-07-02)
In this work we study the embedded cluster mass function (ECMF), meaning the mass distribution
function of embedded clusters. Embedded clusters are fully or partially enclosed in interstellar gas,
dust and molecular ...
Three Pion Scattering at Maximal Isospin from Lattice QCD at Physical Mass
(2021-01-07)
In this work the scattering of two pions in $I = 2$ and three pions in $I = 3$ is analyzed with lattice QCD. The process is computed on three Wilson clover twisted mass ensembles generated by the ETMC with total momentum ...
Messung von Polarisationsobservablen in der 2π0-Photoproduktion mit dem Crystal-Barrel/TAPS-Experiment
(2021-03-17)
Die Theorie der starken Wechselwirkung ist im Energiebereich ihrer Bindungszustände, der Mesonen und Baryonen, nicht störungstheoretisch behandelbar. Durch die Untersuchung des Anregungsspektrums der Baryonen kann ein ......
Measurements of q2 moments of inclusive B → Xcℓν decays toward an alternative determination of |Vcb|
(2021-12-06)
This thesis presents the first measurement of the first to the fourth moments of the four-momentum transfer squared q2 spectrum for inclusive B → Xcℓν decays, where ℓ = e, μ. The determination of these ......
The structure of massive star-forming clumps
(2021-11-25)
Among many other critical questions in astrophysics, the high-mass star formation process is a matter of heated debate; so far a comprehensive understanding is lacking. Star formation takes place in cold molecular clouds. ...