Building blocks for photonic quantum technologies
Kai Müller, Technical University of Munich
Abstract:
Photonic quantum technologies rely on the ability to generate, process, and detect quantum states of light with high efficiency and fidelity. Therefore, realizing building blocks for these tasks does not only require highly pure materials and state of the art nanofabrication but moreover to develop a deep understanding of the underlying physical processes. This talk will present insights into the dynamics of generating quantum states of light from optically active few-level quantum systems, represented by semiconductor quantum dots [1-3]. Moreover, progress in pushing the limits of superconducting nanowire single photon detectors via local He-ion irradiation will be discussed [4-5] as well as the potential of atomically thin materials for the detection of single photons in the far infrared regime [6]. Finally, an integrated photonics platform for quantum memories based on Er:CaWO4 will be presented [7].
[1] L. Hanschke et al., npj Quantum Information 4, 43 (2018)
[2] F. Sbresny et al., Physical Review Letters 128, 093603 (2022)
[3] F. Sbresny et al., arXiv:2506.22378 (2025)
[4] S. Strohauer et al., Advanced Quantum Technologies 6, 2300139 (2023)
[5] S. Strohauer et al., Science Advances 11, eadt0502 (2025)
[6] L. Zugliani et al., arXiv:2508.18843 (2025)
[4] F. Becker el al., Advanced Quantum Technologies 9, e70274 (2026)
Bio:
Kai Müller is Associate Professor at the Technical University of Munich (TUM), Germany, where he leads the Quantum Electronics and Computer Engineering group (QEC). His research focusses on the development of building blocks for photonic quantum technologies, such as non-classical light sources, spin-photon interfaces or single-photon detectors, as well as their integration into quantum photonic integrated circuits. After completing a Ph.D. in physics at TUM, he worked as a postdoctoral researcher at Stanford University. Subsequently, he established a junior research group at the Walter Schottky Institute of TUM. In 2019, he was appointed as assistant professor at TUM and obtained early tenure as associate professor in 2022.
Location
QNC 0101
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