Blueprint of a Molecular Spin Quantum Processor

• URL: http://arxiv.org/abs/2305.01688v1
• Date: Tue, 2 May 2023 18:00:06 GMT
• Title: Blueprint of a Molecular Spin Quantum Processor
• Authors: A. Chiesa, S. Roca, S. Chicco, M. C. de Ory, A. G\'omez-Le\'on, A. G\'omez, D. Zueco, F. Luis, S. Carretta
• Abstract summary: We present the blueprint of a Molecular Spin Quantum Processor consisting of single Molecular Nanomagnets, acting as qudits. We show how to implement a universal set of gates in such a platform and to readout the final qudit state.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The implementation of a universal quantum processor still poses fundamental issues related to error mitigation and correction, which demand to investigate also platforms and computing schemes alternative to the main stream. A possibility is offered by employing multi-level logical units (qudits), naturally provided by molecular spins. Here we present the blueprint of a Molecular Spin Quantum Processor consisting of single Molecular Nanomagnets, acting as qudits, placed within superconducting resonators adapted to the size and interactions of these molecules to achieve a strong single spin to photon coupling. We show how to implement a universal set of gates in such a platform and to readout the final qudit state. Single-qudit unitaries (potentially embedding multiple qubits) are implemented by fast classical drives, while a novel scheme is introduced to obtain two-qubit gates via resonant photon exchange. The latter is compared to the dispersive approach, finding in general a significant improvement. The performance of the platform is assessed by realistic numerical simulations of gate sequences, such as Deutsch-Josza and quantum simulation algorithms. The very good results demonstrate the feasibility of the molecular route towards a universal quantum processor.

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