Dresden 2006 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 18: Symposium Quantum optics in semiconductors II
HL 18.3: Fachvortrag
Dienstag, 28. März 2006, 16:00–16:30, HSZ 01
Deutsch-Jozsa Algorithm using Triggered Single Photons from a Single Quantum Dot — •Oliver Benson1, Matthias Scholz1, Thomas Aichele2, and Sven Ramelow1 — 1Humboldt-Universität zu Berlin, Institut für Physik, Hausvogteiplatz 5-7, 10117 Berlin, Germany — 2CEA/Université J. Fourier, Laboratoire Spectrométrie, Grenoble, France
Recently, wide attention has been drawn to the implementation of quantum algorithms by solely using linear optics. Previous experimental demonstrations along this line focused on coherent photon states from attenuated laser pulses [1] or spontaneous parametric down-conversion [2] in order to simulate simple quantum algorithms or to demonstrate concepts of noise resistant quantum computation [3]. We realize the on-demand operation of the two-qubit Deutsch-Jozsa algorithm using a triggered single-photon source. Our experimental setup resembles a classical Mach-Zehnder interferometer that is combined with a single-photon source realized by an exciton transition in a single quantum dot [4]. A variation of our experimental setup enables us to implement ideas of the concept of decoherence-free subspaces [5] in a triggered quantum algorithm on the single-photon level.
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[2] M. Bourennane et al., Phys. Rev. Lett. 92, 107901 (2004)
[3] M. Mohseni et al., Phys. Rev. Lett. 91, 187903 (2003)
[4] V. Zwiller et al., Appl. Phys. Lett. 82, 1509 (2003)
[5] P. Zanardi and M. Rasetti, Phys. Rev. Lett. 79, 3306 (1997)