Authors: Pino, M.; Garcia-Ripoll, Juan J.

Contribution: Article


Publication date: 2020/03/18

DOI: 10.1103/PhysRevA.101.032324

Abstract: We show a significant reduction of errors for an architecture of quantum annealers where bosonic modes mediate the interaction between qubits. These systems have a large redundancy in the subspace of solutions, supported by arbitrarily large bosonic occupations. We explain how this redundancy leads to a mitigation of errors when the bosonic modes operate in the ultrastrong coupling regime. Numerical simulations also predict a large increase of qubit coherence for a specific annealing problem with mediated interactions. We provide evidence that noise reduction occurs in more general types of quantum computers with similar architectures.