A superconducting metamaterial quantum processor for studying quantum many-body physics: Part 1

Superconducting quantum circuits have emerged as a promising platform to study quantum many-body physics. Compared to traditional AMO systems, superconducting qubits offer new possibilities to study higher-order many-body effects, at a high repetition rate, with full individual local qubit control, quantum non-demolition readout, and real-time feedback control. In this talk, we discuss the realization of a resource-efficient quantum processor based on a superconducting metamaterial waveguide. The metamaterial waveguide mediates tunable long-range exchange interaction between qubits, simultaneously acting as a channel to perform dispersive readout of qubits. In particular, the metamaterial itself is a Purcell filter with high contrast, enabling multiplexed single-shot readout of qubits with high fidelity. Our work marks an important step towards quantum simulation of many-body models beyond nearest-neighbor coupling.