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A: Fachverband Atomphysik

A 37: Poster – Ultra-cold Plasmas and Rydberg Systems (joint session A/Q)

A 37.4: Poster

Donnerstag, 5. März 2026, 17:00–19:00, Philo 1. OG

Collectively Enhanced Detection — •Lew Schöne, Amar Bellahsene, Swayangdipta Bera, Clément Gradziel, Maximilian Müllenbach, Shuzhe Yang, Tom Bienaimé, and Shannon Whitlock — Centre Européen de Sciences Quantiques, Institut de Science et d'Ingénierie Supramoléculaire (UMR 7006), Strasbourg, France

Arrays of single atoms in optical tweezers are a strong contestant in the race for quantum computing and simulation platforms (1). Besides their strengths - scalability, environmental isolation and adaptability - the system still lags speed when it comes to qubit manipulation and readout. This project aims to implements a new fast detection scheme to enable measurements on the microsecond timescale.

In the group of Prof. Whitlock in Strasbourg we have experience with arrays of atomic ensembles in microtraps (2). We now want to combine ensembles with single atoms to realize collectively enhanced detection using Rydberg electromagnetically induced transparency (3) to detect the state of a single atomic qubit. The big challenges of this measurement scheme are the preparation of the atomic ensembles and the single atom in neighboring tweezers, as well as an optimized interaction and readout sequence. Implemented on a potassium quantum gas machine, this new detection method will enable fast and state sensitive measurements.

(1) M. Morgado and S. Whitlock, AVS Quantum Science 3, no. 2 (2021)

(2) Y. Wang et al., Npj Quantum Information 6, no. 1 (2020)

(3) W. Xu et al., Physical Review Letters 127, no. 5 (2021)

Keywords: Single atom detection; Rydberg; Electromagnetically induced transparency; Collectively enhanced detection; Optical tweezer