Cluster state generation with atomic ensembles via the dipole blockade mechanism

Abstract

We present a new scheme for cluster states generation based on atomic ensembles and the dipole blockade mechanism. The protocol requires identical single photon sources, one ensemble per physical qubit, and regular photodetectors. The general entangling procedure is presented, as well as a procedure that generates Q-qubit GHZ states with probability p ~ eta^{Q/2}, where eta is the combined detection and source efficiency. This is significantly more efficient than any known robust probabilistic entangling operation. The GHZ states form the basic building block for universal cluster states - a resource for the one-way quantum computer.

4 pages and 4 figures, title of article changed

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• Efficient generation of universal two-dimensional cluster states with hybrid systems
• Scalable quantum information processing with atomic ensembles and flying photons
• Cluster state generation using van der Waals and dipole-dipole interactions in optical lattices
• Cluster State Generation with Spin-Orbit Coupled Fermionic Atoms in Optical Lattices
• Optical properties of an atomic ensemble coupled to a band edge of a photonic crystal waveguide
• High teleportation rates using cold-atom ensemble based quantum repeaters with Rydberg blockade
• Efficient generation of multiqubit entanglement states using rapid adiabatic passage
• Entangled photons from composite cascade emitters
• Quantum Information Processing with Continuous Variables and Atomic Ensembles