The development of large-scale quantum networks and distributed quantum computing architectures depends on robust spin-photon interfaces capable of generating deterministic entanglement between remote quantum nodes. While solid-state color centers have demonstrated excellent spin coherence, scaling them into photonic architectures remains challenging due to stochastic defect creation, fabrication variability, and spectral instability near surfaces.
Organic molecular systems offer a compelling alternative. They combine atomic-scale reproducibility, chemical tunability, and compatibility with photonic integrated circuits. Recent breakthroughs have demonstrated highly indistinguishable single photons from integrated molecular emitters, but until now, molecular emitters possessing an internal spin degree of freedom could only be observed in bulk ensembles and not addressed individually.
In this seminar, Dr. Ilai Schwartz, CTO of NVision, will present the first demonstration of individual addressing and coherent control of single molecular spin qubits in a purely organic platform. The work is based on photo-active ground-state triplet carbene molecules embedded in a crystalline host matrix, enabling spin-selective optical emission together with spin coherence times exceeding one millisecond.
The seminar will cover single-molecule optically detected magnetic resonance, coherent microwave control, high-visibility Rabi oscillations, and millisecond-scale coherence achieved through dynamical decoupling. Dr. Schwartz will also discuss how these molecular systems can be integrated into photonic platforms, opening new opportunities for quantum repeaters, distributed quantum computing, and scalable quantum networking.