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Q: Fachverband Quantenoptik und Photonik

Q 61: Matter Wave Interferometry and Metrology III

Q 61.1: Vortrag

Donnerstag, 5. März 2026, 14:30–14:45, P 11

Electron induced Raman interferometry with ’large’ mass particles — •Christian Vogt — BIAS - Bremer Institut für angewandte Strahltechnik GmbH

General relativity and quantum mechanics provide two highly successful yet fundamentally incompatible descriptions of nature for different parameter regimes. An important frontier in modern physics is therefore to design experiments that operate in areas where both may simultaneously influence the dynamics. Experiments where one could measure the gravitational attraction from a quantum object are impossible for now but steady progress has been made by preparing increasingly massive objects in quantum states, typically demonstrated through interference.
Matter-wave interferometers have been realized for electrons, atoms, and complex molecules, with the current mass record around 25 kDa. A promising platform for pushing these limits further is levitated optomechanics, where silica nanoparticles are trapped under high-vacuum conditions and their center-of-mass motion can be cooled to the motional ground state. Since the associated wave packets are only on the picometer scale, current efforts focus on wave function expansion, for example in inverted gaussian or other nonlinear potentials.
We propose a different strategy, where the particles are forced into superposition states by entangling them via coulomb interaction with an electron in superposition. In the talk we will present promising theoretical results on the feasibility of such experiments well beyond the current mass record.

Keywords: Levitated; Optomechanics; Matter wave; Interferometer