Superconducting Circuit Architecture for Digital-Analog Quantum Computing

• URL: http://arxiv.org/abs/2103.15696v2
• Date: Sat, 14 May 2022 11:16:04 GMT
• Title: Superconducting Circuit Architecture for Digital-Analog Quantum Computing
• Authors: J. Yu, J. C. Retamal, M. Sanz, E. Solano and F. Albarr\'an-Arriagada
• Abstract summary: superconducting circuit architecture suitable for digital-analog quantum computing (DAQC) DAQC makes a smart use of digital steps (single qubit rotations) and analog blocks (parametrized multiqubit operations) to outperform digital quantum computing algorithms.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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 a smart use of digital steps (single qubit rotations) and analog blocks (parametrized multiqubit operations) to outperform digital quantum computing algorithms. Our design comprises a chain of superconducting charge qubits coupled by superconducting quantum interference devices (SQUIDs). Using magnetic flux control, we can activate/deactivate exchange interactions, double excitation/de-excitations, and others. As a paradigmatic example, we present an efficient simulation of an $\ell\times h$ fermion lattice (with $2<\ell \leq h$), using only $2(2\ell+1)^2+24$ analog blocks. The proposed architecture design is feasible in current experimental setups for quantum computing with superconducting circuits, opening the door to useful quantum advantage with fewer resources.

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