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We propose a set of schemes to create and probe fractionally chargedexcitations of a fractional Chern insulator state in an optical lattice. Thisincludes the creation of localized quasiparticles and quasiholes using bothstatic local defects and the dynamical local insertion of synthetic fluxquanta. Simulations of repulsively interacting bosons on a finite squarelattice with experimentally relevant open boundary conditions show that alreadya four-particle system exhibits signatures of charge fractionalization in thequantum-Hall-like state at the filling fraction of $1/2$ particle per fluxquantum. This result is favorable for the prospects of adiabatic preparation offractional Chern insulators. Our work is inspired by recent experimentalbreakthroughs in atomic quantum gases: the realization of strong artificialmagnetic fields in optical lattices, the ability of single-site addressing inquantum gas microscopes, and the preparation of low-entropy insulating statesby engineering an entropy-absorbing metallic reservoir.

Creating, probing, and manipulating fractionally charged excitations of fractional Chern insulators in optical lattices