Single-molecule electron spin resonance spectroscopy under ambient conditions

Magnetic resonance is essential in revealing the structure and dynamics of biomolecules. However, measuring the magnetic resonance spectrum of single biomolecules has remained an elusive goal. In this talk, I will introduce our recent results of detecting the electron spin resonance signal from a single spin-labeled protein under ambient conditions. As a sensor, we use a single nitrogen vacancy center in bulk diamond in close proximity to the protein. Some explorations of scallable quantum computation with this technique will also be demonstrated.