Quantum sensing exploits fundamental features of quantum mechanics and quantum control to realise sensing devices with potential applications in a broad range of scientific fields ranging from basic science to applied technology. The ultimate goal are devices that combine unprecedented sensitivity with excellent spatial resolution. Here, we propose an new platform for all-electric nanoscale quantum sensing based on a carbon nanotube double quantum dot. Our analysis demonstrates that the platform can achieve sensitivities that allow for the implementation of single-molecule magnetic resonance spectroscopy and therefore opens a promising route towards integrated on-chip quantum-sensing devices.

Link: Nanoscale Magnetic Resonance Spectroscopy Using a Carbon Nanotube Double Quantum Dot, Wanlu Song, Tianyi Du, Haibin Liu, Martin B. Plenio, and Jianming Cai, Phys. Rev. Applied 12, 054025 (2019)