Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 48: Poster – Quantum Optics, Technologies, and Optomechanics
Q 48.39: Poster
Wednesday, March 12, 2025, 17:00–19:00, Tent
Higher-order photon correlations with trapped ion crystals — •Zyad Shehata1, Benjamin Zenz2, Ansgar Schaefer2, Maurizio Verde2, Stefan Richter1, Joachim von Zanthier1, and Ferdinand Schmidt-Kaler2 — 1Department Physik, FAU Erlangen Nürnberg — 2QUANTUM, Institut für Physik, JGU mainz
Light scattering from trapped ion crystals displays unexpected photon statistical effects, translating particular geometric arrangements into specific higher-order spatio-temporal photon correlations. Experimentally, background-free coherent scattering on Ca+ ions has been achieved using a two-photon transition via the 32D5/2 metastable state and the narrow quadrupole transition 42S1/2*32D5/2. This process enables spin-selective excitation, allowing far-field imaging of the crystals' spin states via the first-order correlation function g(1). Expanding beyond g(1), we explore higher-order photon correlations that reveals improved imaging as well as super- and sub-radiant phenomena, featuring distinct spatio-temporal emission patterns through entanglement in the ion arrays. We present theoretical predictions as well as detailed calculations on the photon count rates and the signal-to-noise ratios for the m-photon detection events g(m) in particular configurations.