Speaker: Daniel Barredo
Affiliation: Laboratoire Charles Fabry, Institut d’Optique, CNRS Palaiseau, France. Nanomaterials and Nanotechnology Research Centre, CSIC Oviedo, Spain.
Date: Tuesday, 20 April 2021 at 12:00
Location: Online seminar
Rydberg atoms in arrays of optical tweezers are among the most promising platforms for quantum simulation of many body quantum systems [1]. In this seminar, I will give a brief overview about the platform and report on our recent implementation of the antiferromagnetic Ising model with a transverse field in two different 2D geometries, a square and a triangular lattice, with up to 200 atoms [2]. By dynamically tuning the Hamiltonian we coherently drive the system across a phase transition and directly probe antiferromagnetic order. Individual control and readout of the qubits allows us to measure scalable order parameters, such as the staggered magnetization, during the dynamics. We compare these observables with state-of-the-art numerical simulations for up to 100 particles, where results are still theoretically tractable. This critical benchmark of the quantum simulation demonstrates that our platform is suitable to investigate spin models in regimes that can no longer be studied numerically, and where concepts such as geometrical frustration or spin liquids are not well understood.