Dipolar Spin Models with Arrays of Superconducting Qubits

TL;DR

This paper introduces a new platform using superconducting qubits to simulate dipolar spin models, enabling exploration of complex quantum magnetic phases with current technology.

Contribution

It presents a novel use of 3D Transmon qubits with dipolar interactions for quantum simulation of spin models in circuit QED systems.

Findings

Potential to realize tunable spin models in 1D and 2D geometries.

Robustness of quantum magnetic phases against disorder and decoherence.

Feasibility of observing Majumdar-Ghosh-type phases with current experiments.

Abstract

We propose a novel platform for quantum many body simulations of dipolar spin models using current circuit QED technology. Our basic building blocks are 3D Transmon qubits where we use the naturally occurring dipolar interactions to realize interacting spin systems. This opens the way toward the realization of a broad class of tunable spin models in both two- and one-dimensional geometries. We illustrate the potential offered by these systems in the context of dimerized Majumdar-Ghosh-type phases, archetypical examples of quantum magnetism, showing how such phases are robust against disorder and decoherence, and could be observed within state-of-the-art experiments.