Quantum clock interferometry (B09)

• Subject Area: Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
• Term: since 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 274200144

The project investigates interferometry with spatially delocalised optical clock states. Using appropriate interferometer geometries identified by us, such measurements are sensitive to the general relativistic gravitational redshift. Since such quantum clock interferometers have not been demonstrated so far, this is one of DQ-mat’s most ambitious goals. With theory support by another project, we will experimentally realize the first quantum clock interferometer, and subsequently scale it up to meter-sized delocalizations in the Very Long Baseline Atom Interferometer facility. This will provide a novel experimental access for testing the gravitational redshift with quantum-mechanical objects, thus strengthening DQ-mat's quantum sensors for testing fundamental physics.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1227: Designed Quantum States of Matter (DQ-mat) - generation, manipulation, and detection for metrological applications and tests of fundamental physics
• Applicant Institution: Gottfried Wilhelm Leibniz Universität Hannover
• Project Heads: Dr. Dennis Schlippert; Dr. Christian Schubert