Field programmable spin arrays for scalable quantum repeaters

Hanfeng Wang; Matthew E Trusheim; Laura Kim; Hamza Raniwala; Dirk R Englund

doi:10.1038/s41467-023-36098-8

Field programmable spin arrays for scalable quantum repeaters

Nat Commun. 2023 Feb 9;14(1):704. doi: 10.1038/s41467-023-36098-8.

Authors

Hanfeng Wang^{1

2}, Matthew E Trusheim^{3

4}, Laura Kim^{1

5}, Hamza Raniwala^{1

2}, Dirk R Englund^{6

7}

Affiliations

¹ Research Laboratory of Electronics, M.I.T., 50 Vassar Street, Cambridge, MA, 02139, USA.
² Department of Electrical Engineering and Computer Science, M.I.T., Cambridge, MA, 02139, USA.
³ Research Laboratory of Electronics, M.I.T., 50 Vassar Street, Cambridge, MA, 02139, USA. mtrush@mit.edu.
⁴ DEVCOM, Army Research Laboratory, Adelphi, MD, 20783, USA. mtrush@mit.edu.
⁵ Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
⁶ Research Laboratory of Electronics, M.I.T., 50 Vassar Street, Cambridge, MA, 02139, USA. englund@mit.edu.
⁷ Department of Electrical Engineering and Computer Science, M.I.T., Cambridge, MA, 02139, USA. englund@mit.edu.

Abstract

The large scale control over thousands of quantum emitters desired by quantum network technology is limited by the power consumption and cross-talk inherent in current microwave techniques. Here we propose a quantum repeater architecture based on densely-packed diamond color centers (CCs) in a programmable electrode array, with quantum gates driven by electric or strain fields. This 'field programmable spin array' (FPSA) enables high-speed spin control of individual CCs with low cross-talk and power dissipation. Integrated in a slow-light waveguide for efficient optical coupling, the FPSA serves as a quantum interface for optically-mediated entanglement. We evaluate the performance of the FPSA architecture in comparison to a routing-tree design and show an increased entanglement generation rate scaling into the thousand-qubit regime. Our results enable high fidelity control of dense quantum emitter arrays for scalable networking.