Regensburg 2013 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 70: Poster Session: Devices; Preparation and characterization; C/diamond; Si/Ge
HL 70.15: Poster
Mittwoch, 13. März 2013, 16:00–20:00, Poster A
Entanglement of a pair of two nitrogen-vacancy centers — •Christian Osterkamp1, Christoph Müller1, Liam McGuinness1, Takashi Yamamoto2, Boris Naydenov1, and Fedor Jelezko1 — 1Institut für Quantenoptik, Universität Ulm, Germany — 2Japan Atomic Energy Agency, 1233 Watanuki-machi, Takasaki, Gunma, 370-1292, Japan
Entanglement is the most counter-intuitive state in the quantum mechanics and it is the main part of the most quantum information protocols. Entangled states can be also used to enhance magnetic field sensitivity. Here we report on experiments towards the creation of entanglement between two single electron spins associated to nitrogen-vacancy defect centers in diamond (NV). The NV is a very promising system as a solid state qubit as well as a nano-scale magnetic field sensor. The fluorescence of single NVs can be detected and its electron spin can be polarized, read-out and manipulated at ambient conditions. We produced a pair of coupled single NV centers by using nitrogen ion implantation in 12C enriched ultra pure single crystalline diamond. Both NVs show long electron spin coherence time T2 ~ 1 ms and a magnetic dipolar coupling of 55 kHz, corresponding to 13 nm distance between the spins. Using this system we will be able to create a variety of entangled states with reasonable fidelity.