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Lecture Lilian Childress


20 July 2011 FWN-Building 5111.0080, Nijenborgh 4, 9747 AG, Groningen
Speaker: Dr. Lilian Childress
Affiliation: Bates College, Maine, USA
Title: Optical detection of spins in diamond
Date: Wed Jul 20, 2011
Start: 16.00
Location: FWN-Building 5111.0080
Host: C.H. van der Wal
Telephone: +31 50 363 4555


The electronic spin associated with the NV centre in diamond constitutes an exceptional solid state system for investigating quantum phenomena, combining long spin coherence times and fast manipulation with a robust optical interface. Furthermore, proximal nuclear spins exhibit hyperfine interactions with the NV electronic spin, enabling development of few-spin quantum registers that have been envisioned as building blocks for quantum repeaters, cluster state computation, and distributed quantum computing. All of these applications require high-fidelity preparation, manipulation, and measurement of multiple spins within the register. While there have been significant advances in coherent control over few-spin systems in diamond, single shot detection of the electronic and nuclear spins has proven challenging. By combining resonant optical excitation techniques pioneered in atomic physics with microfabricated collection optics, high fidelity projective measurement of the NV center spin becomes possible. Moreover, this approach can be extended to enable projective preparation and single shot readout of proximal nuclear spins.  These results pave the way for exploration of quantum correlations and measurement-based quantum information protocols in a solid state system.

Last modified:22 October 2012 2.30 p.m.