Tweezer-programmable 2D quantum walks in a Hubbard-regime lattice

Understand

Quantum walks provide a framework for understanding and designing quantum algorithms that is both intuitive and universal.

• To leverage the computational power of these walks, it is important to be able to programmably modify the graph a walker traverses while maintaining coherence.
• Here, we do this by combining the fast, programmable control provided by optical tweezer arrays with the scalable, homogeneous environment of an optical lattice.
• Using this new combination of tools we study continuous-time quantum walks of single atoms on a 2D square lattice, and perform proof-of-principle demonstrations of spatial search using these walks.