Group Seminar am MPQ and via Zoom: Experimentally Accessible Scheme for a Fractional Chern Insulator in Rydberg Atoms

Sebastian Weber, University of Stuttgart
Group Seminar in MPQ lecture hall & via video conference (Zoom)
Tuesday, June 28, 9.00 am

Abstract:

Rydberg atoms in optical tweezers have emerged as highly promising platforms for quantum simulations. In this talk, I present our proposal for the quantum simulation of a bosonic fractional Chern insulator. The suggested setup relies on Rydberg atoms arranged in a honeycomb lattice, where excitations hop through the lattice by dipolar exchange interactions, and can be interpreted as hard-core bosons. The quantum many-body Hamiltonian is studied within exact diagonalization and DMRG.

I provide experimentally accessible parameters where all signatures indicate the appearance of a fractional state with the same topological properties as the ν=1/2 bosonic Laughlin state. Finally, I describe an efficient adiabatic ramping procedure, which allows for the preparation of the topological state in a finite system, and demonstrate an experimentally accessible smoking gun signature for fractional excitations.