Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 25: Quantum Information: Quantum Computation II
Q 25.4: Vortrag
Dienstag, 24. März 2015, 15:15–15:30, C/HSO
Silicon vacancy centers and their electronic-spin coherence in nanodiamonds — •Clemens Schäfermeier1, Lachlan J Rogers2, Andrea Kurz2, Uwe Jantzen2, Kay D Jahnke2, Alexander Kubanek2, Ulrik L Andersen1, and Fedor Jelezko2 — 1Technical Universit of Denmark, Quantum Physics and Information Technology, 2800 Kongens Lyngby, Denmark — 2Ulm University, Institute for Quantum Optics, 89081 Ulm, Germany
The spectral properties of the negatively charged silicon vacancy (SiV) centre in bulk diamond have proved to be promising.
Strong optical transitions in conjunction with lifetime limited transitions enabled a number of experiments pointing towards quantum information processing (QIP).
Specifically, successful Hong-Ou-Mandel interference and all-optical spin control of the colour centre has established the SiV centre as a candidate for the purpose of QIP.
At cryogenic temperatures, the electronic spin relaxation time is found to be 2.4 ms, while the coherence time T2* is tens of nanoseconds.
By investigating SiV centres present in nanodiamonds less than 100 nm in size, we were not only able to confirm the understanding of the underlying decoherence processes. More importantly, the T2* could be increased.