For our group at the University of Siegen (Germany) we are looking for a motivated postdoc and/or PhD student in the field of quantum information theory, foundations of quantum theory, and quantum optics. The group is led by five PIs (Otfried Gühne, Matthias Kleinmann, Stefan Nimmrichter, Chau Nguyen and Ramona Wolf) and the research topics include:

•  theory of multiparticle entanglement and quantum networks,
•  foundations of quantum mechanics and Bell nonlocality,
•  security of quantum key distribution and quantum communication,
•  thermodynamics of open quantum systems and quantum thermal machines,
•  quantum metrology and quantum learning,
•  matter wave interferometry, decoherence theory, quantum-classical transition.

Applicants for a PhD position are expected to have a MSc in physics, experience in theoretical physics and interest in foundational questions of quantum mechanics. Applicants for a postdoc position are expected to have a significant research record in a relevant field. For further information, please see our webpage or contact us directly via email.

Applications (including CV and a list of publications) for a postdoc position shall be sent to Matthias Kleinmann (matthias.kleinmann@uni-siegen.de); applications for a PhD position to Otfried Gühne (otfried.guehne@uni-siegen.de). The deadline for applications is October 31st, 2025, but later applications may also be considered.