Berlin 2012 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 48: Focus Session: Spintronics (jointly with MA)

HL 48.3: Talk

Wednesday, March 28, 2012, 10:30–10:45, EW 201

Nuclear spin quantum registers with NV centers in diamond — •Helmut Fedder¹, Jan Honert¹, Nan Zhao¹, Junichi Isoya², and Jörg Wrachtrup¹ — ¹3. Physikalische Institut, Uni Stuttgart — ²University of Tsukuba, Japan

Nitrogen-Vacancy centers in diamond are promising solid state systems for quantum information processing with long (several ms) spin coherence time at room temperature. The defect has a strong optical transition that can be used for preparation and readout of the electron spin [1]. Nearby nuclear spins can be used to realize quantum registers with few qubits [2]. Single shot nuclear spin readout has been demonstrated in high magnetic fields [3]. Here we present recent results towards multi nuclear spin qubit registers. Exploiting the long coherence time in isotopically clean diamond, we enable addressing of weakly coupled nuclear spins. A detailed account will be given on the decoherence mechanisms, dynamical decoupling techniques and robust manipulation using double quantum transitions.

[1] Jelezko et al. PRL 93, 130501 (2004)

[2] Neumann et al. Science 320, 1326 (2008), Multipartite Entanglement Among Single Spins in Diamond

[3] Neumann et al. Science 329, 542 (2010), Single-Shot Readout of a Single Nuclear Spin