Quantum Simulations of Superconducting Flux Circuits*

One of the main avenues being explored as of late to obtain quantum speedups by annealing is that of quantum simulations, wherein one performs measurements mid-anneal. To that aim, there is a tremendous ongoing effort to fabricate superconducting flux circuits which are non-stoquastic in their qubit representation. Because of this these circuits are thought to be “unsimulatable” by classical approaches such as quantum Monte Carlo; however, we present the results of a study which aims to simulate the circuit Hamiltonian directly by utilizing an infinite Hilbert representation that is, in fact, stoquastic. Our approach obviates the reduction to a qubit representation and produces results that we feel are more in spirit with the experiential setup.