SAMOP 2023 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 18: Quantum Technologies: Trapped Ions (joint session Q/QI)
QI 18.5: Vortrag
Mittwoch, 8. März 2023, 12:00–12:15, F342
Spin-dependent coherent light scattering from linear ion crystal — •Maurizio Verde1, Benjamin Zenz1, Stefan Richter2, Zyad Shehata2, Ferdinand Schmidt-Kaler1, and Joachim von Zanthier2 — 1QUANTUM, Institut für Physik, Universität Mainz, Mainz, Germany — 2Institut für Optik, Information und Photonik, Universität Erlangen, Erlangen, Germany
Linear crystals of ultracold ions are emerging platforms for quantum simulator thanks to their unique properties of long coherence times and high-fidelity optical manipulation. In this perspective, the development of new detection techniques based on photo-correlation measurements is of central interest in order to access structural and dynamical information. Following the ideas reported in [1] on light-crystal coherent scattering, we explored extensions of these phenomena and here we report on a new detection scheme to unveil the spin texture for linear chains of 40Ca+ ions. First, we initialize the crystal in the desired spin configuration, then we use the narrow transitions at 729nm and 854nm to perform spin-dependent coherent scattering and measure the background-free g(1) photo-correlation function by recording light near 393nm in the far field. The laser beam geometry is chosen to minimize the single-ion recoil and therefore the corresponding Debye-Waller factor. We use a high spatio-temporal resolution MCP camera and reveal from the spatial interference pattern the spin texture of the crystal. We discuss the efficiency of our new method for detecting magnetic phases and phase transitions.
[1]Wolf et al., Phys. Rev. Lett. 116, 183002 (2016)