Suppressing decoherence of quantum algorithms by jump codes
Institut für Angewandte Physik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
Corresponding author: a firstname.lastname@example.org
Revised: 22 July 2005
Published online: 13 September 2005
The stabilizing properties of one-error correcting jump codes are explored under the realistic non-ideal condition of finite recovery times. For this purpose the quantum algorithm of the tent-map is decomposed into a universal set of Hamiltonian quantum gates which ensure perfect correction of spontaneous decay processes under ideal circumstances even if they occur during a gate operation. An entanglement gate is presented which is capable of entangling any two logical qubits of different one-error correcting code spaces. With the help of this gate simultaneous spontaneous decay processes affecting physical qubits of different code spaces can be corrected and decoherence can be suppressed significantly.
PACS: 03.67.Lx – Quantum computation / 03.67.Pp – Quantum error correction and other methods for protection against decoherence
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005