Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 32: Quantum Information: Atoms and Ions II

Q 32.1: Talk

Wednesday, March 10, 2010, 14:00–14:15, E 214

Universal enhancement of the optical readout fidelity of single electron spins — •Matthias Steiner, Neumann Philipp, Beck Johannes, Jelezko Fedor, and Wrachtrup Jörg — 3. Physikalisches Institut, Universität Stuttgart, Germany

Single spins in diamond associated with a Nitrogen-Vacancy (NV) center are one of the major candidates for room temperature quantum devices. They might be applied as quantum processors or single spin based magnetometers with unprecedented spatial and magnetic field resolution. Many of the possible applications rely on nearby nuclear spins that can be coherently controlled and coupled to the electron spin. Here we demonstrate how a switchable flip-flop process among the electron spin and several nuclear spins can be used to (1.) initialize the nuclear spin register, (2.) to read out the nuclear spin states directly and (3.) greatly improve the signal-to-noise ratio for the readout of quantum information.