Speaker
Description
Superconducting quantum processors require hardware platforms that combine scalability with flexible multi-qubit interactions. Here, we show how giant atoms, artificial atoms coupled to a waveguide at multiple spatially separated points, enable interference-engineered quantum interactions through phase-controlled coupling to propagating photons. By exploiting quantum interference, giant atoms can realize tunable interactions while operating at decoherence-free points. This mechanism enables the implementation of native multi-qubit gates without additional parametric couplers and naturally extends to scalable network architectures. Our results establish giant atoms as a scalable hardware platform for realizing native qubit interactions and multi-qubit gates for quantum simulation and quantum computation.