Mesoscopic entanglement of noninteracting qubits using collective spontaneous emission
arXiv:quant-ph/0701066 · doi:10.1088/1367-2630/9/11/408
Abstract
We describe an experimentally straightforward method for preparing an entangled W state of up to 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.
replaced; corrected per referee comments
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