Atomic Cluster state build up with classical fluorescence signals
Jeremy Metz
Imperial College, London
Abstract: We outline an approach to cluster state build up based on the observation of classical fluorescence signals. Maximally entangled atom pairs are created using a recently proposed electron-shelving technique [1]. The subsequent fusion of these basic units is achieved via parity measurements, which are similarly triggered on the detection of a macroscopic signal. This means that finite photon detector efficiencies no longer hinder the creation of cluster states. Moreover, the scheme makes constructive use of dissipation. Achieving high fidelities is thus possible, even in the presence of relatively large spontaneous decay rates.
[1] J. Metz, M. Trupke, and A. Beige, Phys. Rev. Lett. 97, 040503 (2006)