"Universal Quantum Computation with ContinuousVariable Cluster States"Nicolas Menicucci , Princeton University & University of Queensland [Host: Olivier Pfister]
ABSTRACT:
I will report on work published in PRL 97, 110501 (2006), in which my coauthors and I describe a generalization of the clusterstate model of quantum computation to continuousvariable systems, along with a proposal for an optical implementation using squeezedlight sources, linear optics, and homodyne detection. For universal quantum computation, a nonlinear element is required. This can be satisfied by adding to the toolbox any singlemode nonGaussian measurement, while the initial cluster state itself remains Gaussian. Homodyne detection alone suffices to perform an arbitrary multimode Gaussian transformation via the cluster state. We also propose an experiment to demonstrate clusterbased error reduction when implementing Gaussian operations.

Atomic Physics Seminar Thursday, December 14, 2006 3:30 PM Physics Building, Room 313 Note special date. Note special room. 
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