Mesoscopic entanglement of noninteracting qubits using collective spontaneous emission

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Kielpinski, David
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2007
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Abstract

We describe anexperimentally straightforward method for preparing an entangled W state of at least 100 qubits. Our repeat-until-success protocol relies on detection of single photons from collective spontaneous emission in free space. Our method allows entanglement preparation in a wide range of qubit implementations that lack entangling qubit-qubit interactions. We give detailed numerical examples for entanglement of neutral atoms in optical lattices and of nitrogen-vacancy centres in diamond. The simplicity of our method should enable preparation of mesoscopic entangled states in a number of physical systems in the near future.

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New Journal of Physics

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9

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NOVEMBER

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© 2007 Institute of Physics Publishing. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.

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Page numbers are not for citation purposes. Instead, this article has the unique article number of 408.

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Physical Sciences

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