Frankfurt 2006 – wissenschaftliches Programm
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Q: Quantenoptik und Photonik
Q 51: Quantencomputer
Q 51.1: Vortrag
Mittwoch, 15. März 2006, 15:00–15:15, HI
Noise Resistant Quantum Algorithm using Triggered Single Photons from a Single Quantum Dot — •Matthias Scholz1, Thomas Aichele2, Sven Ramelow1, and Oliver Benson1 — 1Humboldt-Universität zu Berlin, Physics Department, Nano-Optics, Hausvogteiplatz 5-7, D-10117 Berlin, Germany — 2CEA / Université J. Fourier, Laboratoire Spectrométrie, Grenoble, France
In recent years, wide attention has been drawn to the implementation of quantum algorithms by solely using linear optics. This approach is appealing since only standard optical components like beam splitters and phase shifters are used. Previous experimental demonstrations along this line focused on coherent photon states from attenuated laser pulses or spontaneous parametric down-conversion in order to simulate simple quantum algorithms or to demonstrate concepts of noise resistant quantum computation. We demonstrate the on demand operation of a quantum algorithm using a triggered single-photon source. As a first implementation, we choose the two-qubit Deutsch-Jozsa algorithm which often served in the past to demonstrate the applicability of a certain physical system to a particular quantum computational task. Our experimental setup resembles a classical Mach-Zehnder interferometer. A variation of our experimental setup enables us to implement ideas of noise tolerant encoding of qubits in a triggered quantum algorithm on the single-photon level. Thereby, we prove its adaptability to common all-optical quantum computation schemes. It is possible to encode the qubits in a way that they are unaffected by phase noise which is the main noise contribution in optical interferometric setups.