Berlin 2014 – wissenschaftliches Programm
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SYQR: Symposium Quantum Repeater
SYQR 3: Quantum Protocols and Gates
SYQR 3.3: Vortrag
Dienstag, 18. März 2014, 11:00–11:15, Kinosaal
Quantum error correction in a solid-state hybrid spin register — Gerald Waldherr1, Ya Wang1, •Sebastian Zaiser1, Mohammed Jamali1, Thomas Schulte-Herbrueggen2, Hiroshi Abe3, Takeshi Ohshima3, Junichi Isoya4, Philipp Neumann1, and Joerg Wrachtrup1 — 13. Physikalisches Institut , University of Stuttgart — 2Department of Chemistry, Technical University of Munich — 3Japan Atomic Energy Agency, Takasaki — 4Research Center for Knowledge Communities, University of Tsukuba, Tsukuba
Electron spins associated with solid state defects are promising systems for quantum information processing. Exploiting nuclear spins surrounding the defect as a quantum register provides a natural hybrid spin system. Such a system could be used for a fault-tolerant quantum repeater scheme [1] where the spins might be associated to nitrogen-vacancy (NV) centers in diamond. Here, we present a hybrid spin register based on a single NV defect in diamond coupled to three nuclear spins. The electron spin is used for control, and the nuclear spins as a long-lived quantum storage. We achieve high-fidelity initialization and single shot readout of the nuclear spin register. Implementation of a novel non-local gate combined with optimal control enables universal, high-fidelity control. With these techniques, we demonstrate three-qubit entanglement and quantum error correction. These experiments demonstrate the potential of solid state spin systems for quantum computation and communication. [1] L. Childress, et al., Phys. Rev. Lett. 96, 070504 (2006).