Freiburg 2024 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 5: Ultra-cold Plasmas and Rydberg Systems I (joint session A/Q)
A 5.6: Vortrag
Montag, 11. März 2024, 18:15–18:30, HS 1010
Avalanche terahertz photon detection in a Rydberg tweezer array — •Chris Nill1,2, Albert Cabot1, Arno Trautmann3, Christian Groß3, and Igor Lesanovsky1,4 — 1Institut für Theoretische Physik, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany — 2Institute for Applied Physics, University of Bonn, Wegelerstraße 8, 53115 Bonn, Germany — 3Physikalisches Institut, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany — 4School of Physics and Astronomy, The University of Nottingham, Nottingham, NG7 2RD, United Kingdom
We propose a protocol for the amplified detection of low-intensity terahertz
radiation using Rydberg tweezer arrays [1]. The protocol offers single photon sensitivity together with a low dark count rate. It is split into two phases: during a sensing phase, it harnesses strong terahertz-range transitions between highly excited Rydberg states to capture individual terahertz photons. During an amplification phase, it exploits the Rydberg facilitation mechanism which converts a single terahertz photon into a substantial signal of Rydberg excitations. We discuss a concrete realization based on realistic atomic interaction parameters, develop a comprehensive theoretical model that incorporates the motion of trapped atoms, and study the many-body dynamics using tensor network methods.
[1] C. Nill et al., Avalanche terahertz photon detection in a Rydberg tweezer array, arXiv:2311.16365 (2023).
Keywords: Rydberg; Terahertz; Facilitation dynamics; Tensor networks