  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.
