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Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)

Optical Quantum Computation with Continuous-Variable Cluster States

Peter van Loock

Published Aug 1, 2007• 0 citations
Publisher

Abstract

We describe an extension of the cluster-state model for universal quantum computation from qubits to qumodes (quantized harmonic oscillators), i.e., a translation from discrete to continuous quantum variables, and discuss potential optical realizations via approximate cluster states in form of multi-mode squeezed Gaussian states.
DOI
10.1109/cleopr.2007.4391566

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Continuous-variable Gaussian cluster states are a potential resource for universal quantum computation. They can be efficiently and unconditionally built from sources of squeezed light using beam splitters. Here we report on the generation of three different kinds of continuous-variable four-mode cluster states. In our realization, the resulting cluster-type correlations are such that no corrections other than simple phase-space displacements would be needed when quantum information propagates through these states. At the same time, the inevitable imperfections from the finitely squeezed resource states and from additional thermal noise are minimized, as no antisqueezing components are left in the cluster states.
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