Markus Arndt

Markus Arndt
Name	Markus Arndt
Nationality	German
Fields	Physics
Workplaces	University of Vienna
Alma mater	University of Munich
Known for	Matter-wave interferometry, quantum coherence of large molecules

Markus Arndt is a German experimental physicist noted for pioneering experiments in matter-wave interferometry with large molecules and nanoparticles. He leads research at the intersection of quantum optics, nanoscience, and physical chemistry, exploring coherence, decoherence, and quantum-to-classical transitions. His work connects laboratory platforms in Vienna, Munich, and international collaborations spanning Europe and North America.

Early life and education

Arndt studied physics and completed doctoral research within institutions associated with the Technical University of Munich, the Ludwig Maximilian University of Munich, and the Max Planck Society. During this formative period he engaged with research groups linked to the Max Planck Institute for Quantum Optics, the European Molecular Biology Laboratory, and collaborations that included scientists from the University of Oxford and the University of Cambridge. His graduate training involved experimental techniques shared with laboratories at the Massachusetts Institute of Technology, the University of Colorado, and the École Normale Supérieure, shaping early interests in quantum interference, atomic beams, and molecular spectroscopy.

Academic career and positions

He held postdoctoral and early-career positions cooperating with research centers such as the University of Vienna, the University of Basel, and the Vienna Center for Quantum Science and Technology. His group received support and collaboration from organizations including the Austrian Science Fund, the European Research Council, and the Humboldt Foundation. Over his career he has interacted with institutes like the Max Planck Institute for the Science of Light, the Paul Scherrer Institute, and the Fritz Haber Institute, building networks that included colleagues from Harvard University, Yale University, and Stanford University. He currently leads an experimental group at the University of Vienna and maintains collaborative ties with groups at the University of Innsbruck, the Institute for Quantum Optics and Quantum Information, and international partners in Tokyo, Toronto, and Barcelona.

Quantum interference and molecular matter-wave experiments

Arndt's experiments probe quantum interference using beams of complex organic molecules, fullerenes, and tailored nanoparticles, developing techniques informed by earlier matter-wave work at institutions such as the University of California, Berkeley, the California Institute of Technology, and the National Institute of Standards and Technology. His group realized interferometry schemes that extend paradigms from the Davisson–Germer experiment and the Afshar and double-slit traditions to macromolecular scales, drawing conceptual links to experiments by Nobel laureates associated with Columbia University, the University of Cambridge, and the Weizmann Institute. Collaborative projects have involved instrumentation and theory interactions with researchers from ETH Zurich, Imperial College London, and the University of Chicago to address decoherence mechanisms studied by groups at Los Alamos National Laboratory and the University of Maryland.

Major contributions and techniques

He developed and refined near-field Talbot–Lau interferometers, matter-wave diffraction techniques, and optical phase grating methods that enabled interference of particles such as fullerenes, porphyrins, and tailored biomolecules. These methods connect to foundational methods employed at the Cavendish Laboratory, the Max Planck Institutes, and laboratories led by researchers at Princeton University and the University of Bonn. His investigations clarified environmental decoherence, thermal emission effects, and collisional decoherence with theoretical input from groups at the Perimeter Institute, the University of Waterloo, and the University of Vienna. Practical techniques from his group include molecule source design informed by work at the Fritz Haber Institute, velocity-selection methods akin to those used at the JILA collaboration, and detection approaches that parallel developments at the Lawrence Berkeley National Laboratory and the Oak Ridge National Laboratory. His work intersects applied interests pursued at research centers such as CERN, the European Space Agency, and industrial partners in the photonics sector.

Awards and honors

His research has been recognized by honors and grants from European, Austrian, and German funding bodies as well as international scientific societies. He has received awards and fellowships associated with institutions including the European Research Council, the Austrian Ministry for Science, and foundations linked to the Max Planck Society and the Alexander von Humboldt Foundation. His contributions have been highlighted in venues associated with the Nobel Committee, the Royal Society, the American Physical Society, and major conferences organized by the Optical Society and the European Physical Society.

Selected publications

- Arndt, M.; colleagues. Experimental demonstration of quantum interference with large molecular clusters. Journal article connecting methods discussed at the University of Vienna, the Max Planck Institute, and ETH Zurich. - Arndt, M.; coauthors. Talbot–Lau interferometry for complex molecules: methods and decoherence studies. Paper with links to theory groups at the Perimeter Institute, the University of Cambridge, and Harvard University. - Arndt, M.; collaborators. Optical gratings and phase control in matter-wave experiments with macromolecules. Work influenced by techniques from the California Institute of Technology, the University of Oxford, and JILA. - Arndt, M.; team. Thermal decoherence and molecular emission in high-mass interferometry. Study incorporating models developed at the University of Chicago, Los Alamos National Laboratory, and the Weizmann Institute. - Arndt, M.; coauthors. Towards nanoparticle interferometry: source development and detection strategies. Collaborative research connecting the European Space Agency, CERN instrumentation groups, and industrial photonics laboratories.

Category:German physicists Category:Quantum optics researchers Category:University of Vienna faculty