University of Copenhagen
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The research will be conducted at The Niels Bohr Institute, which represents the research and education within the physical sciences at the University of Copenhagen. The Neutral Atoms group works with cold atom-based precision measurements and strong interactions in atomic systems. They are part of the NNF Quantum Computing programme, where they develop fast atom-based readout techniques, collective interaction systems and single atom control. The team has significant experience with developing precision atomic interaction and interrogation methods and with quantum limited measurements techniques. UCPH has a very strong focus on quantum research which has produced a healthy ecosystem that is strongly supported through multiple DNRF Centers of Excellence, Novo Nordisk Foundation programmes on quantum computing, quantum photonics, quantum optics for biophysics as well as their associated devices and algorithms.
UCPH possesses state-of-the-art facilities and technical staff within cold atom experiments. The academic staff available in the beneficiary are likewise active in international experimental and theoretical research within precision physics with ultra cold atoms. The Niels Bohr Institute houses several groups within quantum optics providing a highly stimulating research environment. Infrastructure at the institute includes excellent mechanical and electronic workshops that are available. |
Team members
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Stefan Alaric Schäffer is leading the Neutral Atoms group within the NQCP research center at the Niels Bohr Institute, where they work on atomic architectures for efficient quantum computation circuitry and readout techniques, as well as collective atomic interactions for superradiance, analog simulations and state readout. During his PhD Stefan worked with strontium clocks at NBI and Ytterbium clocks at NIST (Boulder, USA), before moving on to do a postdoc on continuous atomic systems in the cold atoms group at UvA. After joining the Quantum Metrology group at NBI Stefan started the Neutral Atoms (NQCP) group in 2024. Previously they demonstrated the realization of quasi-continuous superradiant lasing with cavity-coupled strontium atoms and are pushing to exceed the atomic storage time needed to show Shawlow-Townes limited linewidth in superradiant lasers.
Contact: [email protected] |
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Jörg Helge Müller is an associate professor at the Niels Bohr Institute. He completed his PhD at the University of Bonn (Germany) with early experiments on atom interferometry using alkaline earth atoms. After post-doc work at NIST (Gaithersburg, United States) and at the University of Pisa (Italy) he joined the Quantum Optics group of Eugene Polzik at NBI in 2003. He now also enthusiastically supports Stefan Alaric Schäffer and the Neutral Atoms group, bringing in know-how on quantum limited measurements with atoms and light.
Contact: [email protected] |
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Pranav Ticku holds a master’s degree from the Indian Institute of Science (IISc), Bangalore. As a PhD candidate at UCPH, he will focus on rebuilding the strontium experiment with technical improvements and an additional “green MOT” cooling stage. The goal is to increase the lifetime of the superradiant kHz transition of 88Sr that will result in an active atomic clock with higher stability. The same system will also be used to explore novel emergent phenomenon such as bright and dark superposition states in Sr, and cavity mediated interactions between sub-ensembles of Sr.
Contact: [email protected] |
