Room temperature operation quantum sensor platform based on arrays of single-erbium ion qubits

Advancing quantum sensing and photonics requires quantum devices that are compatible with existing wafer-scale processing, enabling scalable integration into photonic integrated circuits (PICs) and operation at higher temperatures (≥77 K). In this context, telecom single-photon emitters and qubits based on single ions/defects in solid-state materials are vital for the development of quantum PICs. However, scaling these materials beyond the lab remains practically elusive due to materials’ constraints and stringent operating conditions, rendering them unsuitable for real-world implementation at the telecom C-band. Our approach utilizes a novel, scalable nanofabrication scheme to address these challenges, enabling the creation of spatially isolated and individually addressable single erbium ion qubits in silicon-based nanopillars, thereby paving the way for significant breakthroughs. Our quantum devices exhibit room-temperature operation and unparalleled characteristics, paving the way for quantum advantage by building a foundry-fabricated quantum sensor platform that is practical for widespread deployment in aerospace applications.