Speaker
Description
Supersolids are exotic states of matter that spontaneously break two symmetries: gauge invariance through the phase-locking of the wavefunction, and translational symmetry owing to the emergence of a crystalline structure. In a first part, we report on the theoretical study and experimental observation of vortices in a dipolar supersolid of Dysprosium [1]. When rotated, the supersolid phase shows a mixture of rigid-body and irrotational behavior, highlighting a fundamental difference between modulated and unmodulated superfluids.
Neutral atoms in optical tweezers are one of the most promising platforms for quantum simulation and computation as they offer the implementation of arbitrary geometries, dynamical reconfiguration, generation of free-defects arrays and controllable long-range coupling via Rydberg-mediated interactions. In the second part, we will present our latest results on the successful loading and detection of single erbium atoms in a linear array of optical tweezers [2]. By implementing two complementary techniques for single atoms detection - narrow-linewidth non-destructive and broad-linewidth ultrafast imaging - we characterized the differential light shift for the intercombination line of erbium, and we investigated light-assisted collisions (LAC) and heating-induced losses.
[1] Observation of vortices in a dipolar supersolid, E. Casotti, E. Poli, L. Klaus, A. Litvinov, C. Ulm, C. Politi, M. J. Mark, T. Bland, F. Ferlaino, Nature, 635, 327–331, 2024
[2] Optical Tweezer Arrays of Erbium Atoms, D. S. Grun, S. J. M. White, A. Ortu, A. Di Carli, H. Edri, M. Lepers, M. J. Mark, F. Ferlaino, Phys. Rev. Lett., 133, 223402, 2024
