Superconducting circuit architecture for digital-analog quantum computing

Abstract We propose a superconducting circuit architecture suitable for digital-analog quantum computing (DAQC) based on an enhanced NISQ family of nearest-neighbor interactions. DAQC makes smart use digital steps (single qubit rotations) and analog blocks (parametrized multiqubit operations) to outperform algorithms. Our design comprises chain charge qubits coupled by interference devices (SQUIDs). Using magnetic flux control, we can activate/deactivate exchange interactions, double excitation/de-excitations, others. As paradigmatic example, present efficient simulation $\ell \times h$ ℓ × h fermion lattice (with $2<\ell \leq 2 < ≤ ), using only $2(2\ell +1)^{2}+24$ ( + 1 ) 24 blocks. The proposed is feasible in current experimental setups with circuits, opening the door useful advantage fewer resources.