Programmable quantum circuits in a large-scale photonic waveguide array
Yang Yang, Robert J. Chapman, Akram Youssry, Ben Haylock, Francesco, Lenzini, Mirko Lobino, and Alberto Peruzzo

TL;DR
This paper demonstrates precise control of single-photon states in a large-scale, programmable photonic waveguide array, showcasing its potential for scalable quantum information processing.
Contribution
First demonstration of controlling single-photon states in an 11x11 programmable waveguide array with high visibility and tunable interference.
Findings
Achieved maximum quantum interference visibility of 0.962
Controlled multiple subcircuits simultaneously on a single device
Showcased potential for scalable quantum information processing
Abstract
Over the past decade, integrated quantum photonic technologies have shown great potential as a platform for studying quantum phenomena and realizing large-scale quantum information processing. Recently, there have been proposals for utilizing waveguide lattices to implement quantum gates, providing a more compact and robust solution compared to discrete implementation with directional couplers and phase shifters. We report on the first demonstration of precise control of single photon states on an continuously-coupled programmable waveguide array. Through electro-optical control, the array is subdivided into decoupled subcircuits and the degree of on-chip quantum interference can be tuned with a maximum visibility of 0.9620.013. Furthermore, we show simultaneous control of two subcircuits on a single device. Our results demonstrate the potential of using this…
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Taxonomy
TopicsNeural Networks and Reservoir Computing · Optical Network Technologies · Photonic and Optical Devices
