Engineering Spin Interactions in Circuit QED Lattices
Abstract
Circuit QED has emerged as a rich platform for both quantum computation and simulation. Lattices of coplanar waveguide (CPW) resonators realize artificial photonic materials that provide a tailored environment for superconducting qubits. Qubits in these lattices experience a photonmediated flip-flop interaction, which takes on different forms depending on the structure of the lattice. Incorporating multiple qubits into the same device gives rise to a direct hardware-level implementation of a graph-like spin model whose connections are determined by the microwave resonator network. Previous devices of this type have operated in the simplest one-dimensional chains that produce an extremely short-ranged exponentially decaying interaction. This puts severe limitations on the models that can be realized. For example, it precludes frustrated interactions, in which different terms compete and favor different configurations, allowing a spin model to exhibit memory, and hyperbolic interactions, which lead to rapid growth of connectivity and efficient connections. Classical graphs and neural networks with these types of connectivity have already revolutionized classical computing, but experimental realization of the potentially vastly more powerful quantum analogs is still in its infancy.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 07, 2023
- Source ID
- FA95502110129
Entities
People
- Alicia Kollar
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Maryland