Theory Project

6 total

08FEB 2022
Projects
Ultrafast control of spin-orbital separation probed with time-resolved RIXS
Abstract Quasi-one-dimensional systems exhibit many-body effects elusive in higher dimensions. A prime example is spin-orbital separation, which has been measured by resonant inelastic X-ray scattering (RIXS) in Sr2CuO3. We derive the time-resolved RIXS spectrum of Sr2CuO3 under the action of a time-dependent electric field. We show that the external field can reversibly modify the parameters […]Abstract Quasi-one-dimensional systems exhibit many-body effects elusive in higher dimensions. A prime example is spin-orbital separation, which has been measured by resonant inelastic X-ray scattering (RIXS) in Sr2CuO3. We derive the time-resolved RIXS spectrum of Sr2CuO3 under the action of a time-dependent electric field. We show that the external field can reversibly modify the parameters […]
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02FEB 2022
Projects
Simulation Of The Impact Of Processing Conditions On The Perovskite Film Morphology
Abstract The climate change is a worldwide pressing problem. One little contribution to solve this problem is to investigate new and better solar cells. Solar cells made out of perovskite can be made by printing and could be a low cost, eco-friendly alternative to standard silicon solar cells. Although there has been a huge increase […]
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01FEB 2022
Projects
Insight into the Quantum World
Michael Nicklas has studied and obtained his PhD within the research orientated program “Physics advanced”. He investigated quantum transport in individual carbon nanotubes and developed new theoretical tools for their description. Schrodingers cat The paradox of coexistence or superposition of virtually exclusive quantum states is vividly staged by the imaginary Schrödinger’s cat experiment where a […]Michael Nicklas has studied and obtained his PhD within the research orientated program “Physics advanced”. He investigated quantum transport in individual carbon nanotubes and developed new theoretical tools for their description. Schrodingers cat The paradox of coexistence or superposition of virtually exclusive quantum states is vividly staged by the imaginary Schrödinger’s cat experiment where a […]
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30JAN 2022
Projects
Simulation Based Density Scans On Different 2D Colodial System Configurations
In a research project Johannes Schumann from Physics Advances explored how colloidal quasicrystals can be obtained by tailoring the interactions between the particles. Quasicrystals are well-ordered structures that do not posses any periodicity. Therefore, there is no unit cell and the rotational symmetry can be more complex than in periodic crystals. Quasicrystals: Non-periodic but still […]
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14JAN 2022
Projects
Harmonic chains with hard wall constraints in classical and quantum mechanics
Ich heiße Dominik Hahn und war ab meinem dritten Semester (WS 2016/17) bis zu meinem Master-Abschluss 2020 Mitglied im Forschungsstudiengang. Im Augenblick bin ich Doktorand am Max-Planck-Institut für die Physik komplexer Systeme in Dresden. Meine Masterarbeit habe ich am Lehrstuhl von Prof. Klaus Richter in einer Kollaboration mit Prof. Shivaji Sondhi von der Princeton University […]
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08JAN 2021
Projects
Eigenstates of the Lewis-Riesenfeld invariant for de Sitter and quasi-de Sitter universes
Abstract Motivated from considerations in theoretical cosmology about fluctuations in the very early universe, the aim of the project was to investigate the spectrum of the Lewis-Riesenfeld invariant, an invariant of the time-dependent harmonic oscillator Hamiltonian, and to analyse the behaviour of its two lowest eigenstates in position representation. Scientific background The nature of the […]Abstract Motivated from considerations in theoretical cosmology about fluctuations in the very early universe, the aim of the project was to investigate the spectrum of the Lewis-Riesenfeld invariant, an invariant of the time-dependent harmonic oscillator Hamiltonian, and to analyse the behaviour of its two lowest eigenstates in position representation. Scientific background The nature of the […]
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