Berlin 2012 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 89: Focus Session: Quantum Information Systems (jointly with MA,TT)
HL 89.2: Vortrag
Donnerstag, 29. März 2012, 17:00–17:15, ER 164
Towards quantum information devices based on NV center in low temperature — •Sen Yang1, Petr Siyushev1, Seyed Ali Momenzadeh1, Nan Zhao1, Naofumi Abe2, Hideo Kosaka2, Helmut Fedder1, and Jörg Wrachtrup1 — 13rd Physics Institute and Research Center SCoPE, Universität Stuttgart, Stuttgart, Germany — 2Research Institute of Electrical Communication, Tohoku University, Sendai, Japan
The Nitrogen-Vacancy (NV) center in diamond is a promising system for quantum communication/computation. Long coherence time and ultra-clean system make diamond an ideal candidate even in ambient condition. Low temperature gives us ability to address excited states individually [1]. Optically resonant excitation of spin-selective transitions and single shot readout of electron spin become possible [2,3]. This opens up the opportunities of making quantum devices based on the fine structure of excited states and photon NV interaction. One example is quantum repeater. Long coherence time makes spin a good choice as memory. Ms=±1 ground states and A1/A2 excited state form Λ system which make writing, reading and flying qubit generation possible. Here, we presents recent results on coherent spin manipulation of NV center in low temperature and results towards quantum devices like quantum repeater.[1] A. Batalov, et al, PRL 102, 195506(2009).[2] L. Robledo, et al, Nature 477, 574(2011).[3] E. Togan, et al, Nature 478, 497(2011).