Regensburg 2013 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 95: Spintronics/Quantum information: Vacancies in diamond and SiC (HL, jointly with TT)
HL 95.5: Vortrag
Freitag, 15. März 2013, 10:30–10:45, H14
Nuclear spin control with a transient electron spin ancilla — •Helmut Fedder1, Sang-Yun Lee1, Matthias Widman1, Torsten Rendler1, Moritz Eyer1, Sen Yang1, Petr Siyushev1, Marcus Doherty2, Neil Manson2, and Jörg Wrachtrup1 — 13. Physikalisches Institut and Research Center SCoPE, University Stuttgart, Germany — 2Laser Physics Center, Research School of Physics and Engineering, Australian National University, Canberra, Australia
Electron spins associated with point defects in crystals are promising systems for solid state quantum technology [1-3]. In particular, defects with a spin-less ground state and an excited triplet state have been proposed as universal ancillae for addressing nuclear spins [2]. In here we demonstrate the control of an individual 13C lattice nuclear spin in diamond by exploiting a hitherto unknown electron spin defect that features an excited triplet state. Using optical and microwave control, we demonstrate coherent manipulation of the triplet electron spin and characterize its photo-physics. We then show coherent manipulation of the nuclear spin in the spin-less electronic ground state.
[1] J.J.L. Morton et al. Solid-state quantum memory using the 31P nuclear spin. Nature 455, 1085 (2008).
[2] V. Filidou et al. Ultrafast entangling gates between nuclear spins using photoexcited triplet states. Nature Phys. 8, 596 (2012).
[3] P.C. Maurer et al. Room-Temperature Quantum Bit Memory Exceeding One Second. Science 336, 1283 (2012).