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.