We propose a quantum simulator based on driven superconducting qubits where the interactions are generated parametrically by a polychromatic magnetic flux modulation of a tunable bus element. Using a time-dependent Schrieffer-Wolff transformation, we analytically derive a multi-qubit Hamiltonian which features independently tunable XX and YY-type interactions as well as local bias fields over a large parameter range. We demonstrate the adiabatic simulation of the ground state of a hydrogen molecule using two superconducting qubits and one tunable bus element. The time required to reach chemical accuracy lies in the few microsecond range and therefore could be implemented on currently available superconducting circuits. Further applications of this technique may also be found in the simulation of interacting spin systems.
@article{arxiv.1808.04666,
title = {Adiabatic quantum simulations with driven superconducting qubits},
author = {Marco Roth and Nikolaj Moll and Gian Salis and Marc Ganzhorn and Daniel J. Egger and Stefan Filipp and Sebastian Schmidt},
journal= {arXiv preprint arXiv:1808.04666},
year = {2019}
}