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Q: Fachverband Quantenoptik und Photonik
Q 38: Nano-Optics (Single Quantum Emitters) II
Q 38.2: Vortrag
Mittwoch, 13. März 2019, 14:15–14:30, S SR 112 Maschb.
Optimal Control for DNP with Quantum Defects — •Alastair Marshall1, 2 and Fedor Jelezko1 — 1University Ulm, Ulm, Germany — 2NVision Imaging Technologies
The application of dynamic nuclear polarisation (DNP) techniques to systems with quantum defects is a promising way of achieving high levels of polarisation. The nitrogen vacancy centre (NV) in diamond is an excellent candidate as it can be optically polarised to a high degree at room temperature before its state is manipulated with a microwave pulse. While polarisation sequences have been designed to be robust, this is often at the expense of their efficiency. To achieve maximal polarisation transfer in as short a time as possible other techniques must be applied. We chose to apply quantum optimal control algorithms to shape the microwave pulses. A set of constraints that closely mimic our experimental setup were chosen to ensure that the shaped pulses remain realistic. Here, we hope to demonstrate pulses that have an increased robustness to errors while maintaining a high level of efficiency. In future, we hope to use these to achieve high levels of polarisation in diamond.
Reference: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.111.067601