Photonic implementation for the topological cluster-state quantum computer

An implementation of the topological cluster-state quantum computer is suggested, in which the basic elements are linear optics, measurements, and a two-dimensional array of quantum dots. This overcomes the need for nonlinear devices to create a lattice of entangled photons. Whereas the thresholds f...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2010-09, Vol.82 (3), Article 032332
Main Authors: Herrera-Martí, David A., Fowler, Austin G., Jennings, David, Rudolph, Terry
Format: Article
Language:English
Subjects:
BOSONS
CALCULATION METHODS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPUTERS
EFFICIENCY
ELEMENTARY PARTICLES
ERRORS
IMPLEMENTATION
MASSLESS PARTICLES
MATHEMATICS
NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
NONLINEAR PROBLEMS
OPTICS
PHOTONS
PROBABILISTIC ESTIMATION
QUANTUM COMPUTERS
QUANTUM DOTS
QUANTUM ENTANGLEMENT
TOPOLOGY
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Summary:An implementation of the topological cluster-state quantum computer is suggested, in which the basic elements are linear optics, measurements, and a two-dimensional array of quantum dots. This overcomes the need for nonlinear devices to create a lattice of entangled photons. Whereas the thresholds found for computational errors are quite satisfactory (above 10{sup -3}), the estimates of the minimum efficiencies needed for the detectors and quantum dots are beyond current technology's reach. This is because we rely heavily on probabilistic entangling gates, which introduces loss into the scheme irrespective of detector and quantum-dot efficiencies.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.82.032332