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Gigahertz Dynamics of a Strongly Driven Single Quantum Spin
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Journal Article
Gigahertz Dynamics of a Strongly Driven Single Quantum Spin
2009
Overview
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.
Publisher
American Association for the Advancement of Science,The American Association for the Advancement of Science
Subject
