Regensburg 2004 – scientific programme

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TT: Tiefe Temperaturen

TT 22: Quantenkoh
ärenz und Quanteninformationssysteme I

TT 22.2: Talk

Wednesday, March 10, 2004, 14:45–15:00, H19

Solid-state 2-qubit gate based on a single defect center in diamond — •Torsten Gaebel, Michael Domhan, Iulian Popa, Achim Gruber, Fedor Jelezko, and Jörg Wrachtrup — 3. Physikalisches Institut, Universität Stuttgart

For spin-based quantum information processing, the readout and manipulation of the single spin states are of an outmost importance. Recently, single paramagnetic nitrogen vacancy (N-V)defects in diamond have been investigated by the optically detected magnetic resonance (ODMR)technique. Single spin ODMR approach is based on the optical selection of a single paramagnetic defect by confocal optical microscopy. Photon antibunching proves that ODMR signal is originating from the single quantum system.

Pulsed ODMR experiments have been performed in order to demonstrate the ability of the coherent manipulation of single spin states.

Coupling to the spin of a 13C nucleus provides a 2-qubit system, on which the conditional rotation gate (CROT) was performed.