Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 44: Quantum Information II
Q 44.5: Vortrag
Donnerstag, 14. März 2024, 12:00–12:15, HS 1199
Detection of spin order from collective photon scattering — •Benjamin Zenz1, Ansgar Schaefer1, Maurizio Verde1, Zyad Shehata2, Stefan Richter2, Joachim Von Zanthier2, and Ferdinand Schmidt-Kaler1 — 1QUANTUM, Institut für Physik, Mainz, Germany — 2Institut für Physik, Erlangen, Germany
Ion traps are ideal candidate platforms for quantum simulators of interacting spin systems by encoding the effective spins within the internal energy levels of the ions. This talk presents a way to efficiently read out the spin order of an 40Ca+ ion crystal in a segmented Paul trap by detecting collective, coherent photon scattering in the far-field. In the past, we employed far-field photon detection to reveal the ion’s position [1]. Now, we utilize a two-photon process involving a narrow quadrupole transition near 729 nm and a dipole transition near 854 nm to achieve background-free detection of 393 nm photons. Additionally, this scheme enables a spin-selective detection, such that we can determine the spin order of an ion crystal and investigate it’s temporal evolution. Our experimental results are obtained with linear crystals of 3,4 and more ions and fit the theory expectations.
[1] S. Wolf, J. Wechs, J. von Zanthier, and F. Schmidt-Kaler Phys. Rev. Lett. 116, 183002 (2016)
Keywords: Ion trap; Coherent scattering