Mainz 2026 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

Q: Fachverband Quantenoptik und Photonik

Q 28: Poster – Quantum Optics

Q 28.6: Poster

Tuesday, March 3, 2026, 17:00–19:00, Philo 2. OG

Generation of squeezed state superpositions of light with an atom-cavity system — •Maurizio Trigilia, Raphael Benz, Sebastian Alejandro Morales Ramirez, Micha Kappel, Daniel Reigel, Luis Weiß, Vincet Beguin, Leon Layer, Violet Ruf, and Stephan Welte for the QNN collaboration — 5. Physikalisches Institut, Center for Integrated Quantum Science and Technology and CZS Center QPhoton, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany.

We present an experimental protocol that employs an atom-cavity system to generate superpositions of squeezed states of light [1]. To achieve this, a displaced squeezed light state is reflected from an atom-cavity system with the atom prepared in a superposition of a coupling and a non-coupling state. A subsequent measurement of the atom projects the light onto a squeezed Schrödinger-cat state of even or odd parity, depending on the measurement outcome. The scheme can be extended to generate optical Gottesman-Kitaev-Preskill states [1]. In a practical scenario, optical losses lead to a deterioration of the generated light states. We present a theoretical framework that incorporates these losses and apply it to a parameter regime that describes our novel atom-cavity system that is currently in the buildup phase. Our simulations allow us to estimate experimentally achievable state fidelities. We furthermore show simulations of the transport of atoms with an optical dipole trap from a 3D magneto-optical trap into our optical cavity. [1] J. Hastrup, U. Andersen, Phys. Rev. Lett. 128 (17), 170503 (2022).

Keywords: Cavity QED; GKP; Trapped neutral atoms; Dipole Trap; Squeezed cat states