Effective coherent four-body interactions in optical lattices

Saurabh Paul, Eite Tiesinga

Jiannis K. Pachos

Eite Tiesinga, Khan W. Mahmud

Kantaro Honda, Yosuke Takasu, Yuki Haruna +2 more

The authors experimentally investigate a strongly interacting few-body system consisting of ultracold bosons tightly confined in a deep optical lattice site. They obtain a clear signature of an effective four-body interaction, evidenced by the binding energies of four or more atoms in the lattice site.

Hendrik Weimer

We present an architecture for the quantum simulation of many-body spin interactions based on ultracold polar molecules trapped in optical lattices. Our approach employs digital quantum simulation, i.e. the dynamics of the simulated system is reproduced by the quantum simulator in a stroboscopic pattern, and allows to simulate both coherent and dissipative dynamics. We discuss the realisation of Kitaev’s toric code Hamiltonian, a paradigmatic model involving four-body interactions, and analyse the requirements for an experimental implementation.

Stefan Weßel