Journal
SCIENCE
Volume 326, Issue 5959, Pages 1520-1522Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1181193
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Funding
- Air Force Office of Scientific Research
- Army Research Office
- Defense Advanced Research Projects Agency
- U.S. Department of Energy Basic Energy Sciences [DE-AC02-07CH11358]
- Direct For Mathematical & Physical Scien [0801388] Funding Source: National Science Foundation
- Division Of Materials Research [0801388] Funding Source: National Science Foundation
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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.
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