Seminars and Colloquia
Physics
Highly efficient control operations for nuclear spins without RF pulses
Fri, Jan 11, 2019,
04:30 PM
at Seminar Hall 31, 2nd Floor, Main Building
Prof. Dieter Suter
Technical University of Dortmund, Germany
Abstract:
Nuclear and electronic spins are attractive objects not only for spectroscopic studies but also for emergent technologies like quantum information processing and sensing. One of the challenges for controlling hybrid systems consisting of different types of spins is that the speed at which different spin species react to external control operations can differ by many orders of magnitude. It is therefore essential to develop control techniques that result in higher Rabi frequencies of nuclear spin, whose gyromagnetic is 3-4 orders of magnitude smaller than that of the electron spin. For this purpose, we have developed indirect control techniques that are based on sequences of microwave pulses applied to the electron spin in such a way that the motion of the electron spin generates a time-dependent hyperfine interaction acting on the nuclear spin. Suitable sequences of microwave pulses can thus generate arbitrary evolutions of the nuclear spin, at rates that are far higher than those that can be achieved by radio-frequency pulses.
