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Department of Physics

Congratulations to Max Rademacher, Joris Daus and Ngoc Le

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© AG Reiter​/​Rademacher​/​Daus​/​Le
Three students complete their bachelor theses in AG Reiter

We congratulate Max Rademacher, Joris Daus, and Ngoc Le on successfully completing their Bachelor theses in the Reiter group.

Max Rademacher worked on the topic “Theoretical description of nonlinear optical signals in cuprous oxide systems.” He investigated how coupling in semiconductor materials can be revealed through nonlinear four-wave mixing signals. Using numerical simulations, he demonstrated that in two-dimensional spectra, coupling appears as characteristic cross peaks. His results relate to cuprous oxide, a material studied intensively in the Assmann group at TU Dortmund University.

Joris Daus investigated “Dynamics of pulsed excitation in a quantum three-level system.” Three-level systems are a cornerstone of quantum optics and naturally occur in quantum dots when spin states are considered. Using numerical simulations, Joris analysed how pulsed excitation can prepare superposition states between the ground states. He demonstrated that both fractional STIRAP and two-photon excitation can be used to achieve specific target states and related his findings to concepts of quantum gates.

Ngoc Le explored “SUPER in red and blue: Theoretical simulation of quantum emitter dynamics under bichromatic excitation.” The SUPER (Swing-UP of quantum EmitteR) protocol uses two red-detuned laser pulses to excite a quantum emitter. Ngoc investigated whether the SUPER scheme remains effective when one pulse is blue- and the other red-detuned, using a fully quantum-mechanical two-mode Jaynes–Cummings model. Confirming that this bichromatic excitation acts as a one-photon process, she gained detailed insights into the dynamics of the involved states.