Gigahertz Dynamics of a Strongly Driven Single Quantum Spin

TitleGigahertz Dynamics of a Strongly Driven Single Quantum Spin
Publication TypeJournal Article
Year of Publication2009
AuthorsFuchs GD, Dobrovitski VV, Toyli DM, Heremans FJ, Awschalom DD
Journal TitleScience
Date Published12/11
ISBN Number0036-8075
Accession NumberISI:000272623600053
Keywords2-level system, coherent dynamics, diamond, dot, electron-spin, manipulation, nuclear-spin, states

Two-level systems are at the core of numerous real-world technologies such as magnetic resonance imaging and atomic clocks. Coherent control of the state is achieved with an oscillating field that drives dynamics at a rate determined by its amplitude. As the strength of the field is increased, a different regime emerges where linear scaling of the manipulation rate breaks down and complex dynamics are expected. By calibrating the spin rotation with an adiabatic passage, we have measured the room-temperature "strong-driving" dynamics of a single nitrogen vacancy center in diamond. With an adiabatic passage to calibrate the spin rotation, we observed dynamics on sub-nanosecond time scales. Contrary to conventional thinking, this breakdown of the rotating wave approximation provides opportunities for time-optimal quantum control of a single spin.

URL<Go to ISI>://000272623600053