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Q: Quantenoptik und Photonik

Q 22: Poster Quanteninformation, -kommunikation und -computer

Q 22.16: Poster

Dienstag, 23. März 2004, 14:00–16:00, Schellingstr. 3

Quantum Error Correction with Multiple-Error Correcting Quantum Code s — •Gernot Alber and Jörg Wassenberg — Institut für Angewandte Physik, Technische Universität Darmstadt, Hochschulstraße 4a, D-64289 Darmstadt

In order to perform computations with a quantum computer it is necessary to stabilize the computer’s memory against decoherence over a sufficiently large time scale. If the qubits are represented by electronic levels of atoms or ions an important error source is spontaneous emission. Encoding the information in a detected-jump correcting quantum code, errors can be corrected by application of suitable recovery operations upon detection of spontaneous emission events.

We study the stabilizati on of quantum algorithms against spontaneous emission by jump codes being capable of correcting two or more successive errors, and compare with exist ing results using one-error correcting codes.