Regensburg 2002 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 6: Poster: Neue Methoden
CPP 6.1: Poster
Montag, 11. März 2002, 13:30–15:00, B
Quantum computation with single defects in diamond — •Fedor Jelezko1, Iulian Popa1, Carsten Tietz1, Achim Gruber1, Uwe Gerken1, Alexander Nizovtsev2, Sergey Kilin2, Hisao Kanda3, and Jörg Wrachtrup1 — 13. Physikalisches Institut, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany — 2Institute of Physics, National Academy of Science, F.Skarina Avenue 70, 220072 Minsk, Belarus — 3Advanced Materials Laboratory, National Institurte for Material Science, Tsukuba, Japan
We report on the first steps to realize the scheme of NMR quantum computation based on the single defect centers in solids. Compared to the classical (ensemble) NMR approach our scheme has an advantage to work on the pure quantum state, making the quantum processor more easily scalable.
We show the first experimental results, demonstrating the feasibility of proposed approach. As a system we used single nitrogen-vacancy centers in pure (13)C diamond, which can be optically detected, using confocal microscopy. Owing to the hyperfine coupling of the ground electronic spin of the defect to 13C nuclear spins in a diamond lattice, individual nuclear spin states can be addressed optically. We show that the coherence time at low temperature is in the order of seconds allowing to realize up to 105 quantum gates, even without implementing error correction algorithms. Preliminary consideration based on the optical linewidth of defect and strength of hyperfine coupling show that processor with up to 12 q-bits can be realized using proposed system.