Speaker
Description
Dissipative quantum many-body problems, such as those arising in collective light-matter interactions, present theoretical challenges. To explore these phenomena experimentally, we have developed an experimental setup that studies collective light scattering from an ordered ensemble of atoms. Recently, we achieved the first trapping and imaging of single dysprosium atoms in optical tweezers [1], extending the single-atom toolbox to lanthanides. Leveraging the rich internal structure of dysprosium, we can measure the atoms' internal states which we use to investigate collective dissipation both in the linear optics regime and at high saturation [2]. To further enhance the collective behavior of the atoms, we have two approaches. First, we cool the atoms close to their ground state using a 2 kHz transition [3]. Additionally, we are working to bring the atoms to a distance comparable to the wavelength of the transition used for light scattering by implementing a hybrid tweezer and accordion lattice setup.
[1] D. Bloch, B. Hofer, S. R. Cohen, A. Browaeys, and I. Ferrier-Barbut, Trapping and imaging single dysprosium atoms in optical tweezer arrays, Phys. Rev. Lett. 131, 203401 (2023)
[2] B. Hofer, D. Bloch, G. Biagioni, N. Bonvalet, A. Browaeys and I. Ferrier-Barbut, Single-atom resolved collective spectroscopy of a one-dimensional atomic array, arXiv:2412.02541 (2024)
[3] G. Biagioni et al. Narrow line cooling of single dysprosium atoms, in preparation
