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A: Fachverband Atomphysik
A 17: Quantum Protocols and Gates SYQR 3 (with Q)
A 17.7: Vortrag
Dienstag, 18. März 2014, 12:00–12:15, Kinosaal
Towards long coherent time quantum memory based on NV center in low temperature — •Sen Yang1, S. Ali Momenzadeh1, Thai Hien Tran1, Ya Wang1, Naofumi Abe2, Hideo Kosaka2, Helmut Fedder1, Philipp Neumann1, and Joerg Wrachtrup1 — 13rd Physics Institute, Universitaet Stuttgart, Germany — 2Research Institute of Electrical Communication, Tohoku University, Japan
The Nitrogen-Vacancy (NV) center in diamond is a promising system for quantum communication/computation. Low temperature gives us not only ultralong spin lifetime but also the ability to address excited states individually. Optically resonant excitation of spin-selective transitions and single shot readout of electron spin in low magnetic field improve initialization and readout fidelity. This opens up the opportunities of making quantum devices based on the fine structure of excited states and photon NV interaction. Long coherence time makes nuclear spin a good choice as quantum memory. Ms=±1 ground states and A1 excited state form Λ system which make optical writing possible. Here, we presents recent results of this quantum memory scheme. this quantum memory could be an important component for building quantum repeater based on NV center in diamond.