Mesoscopic entanglement of noninteracting qubits using collective spontaneous emission

Details Mesoscopic entanglement of noninteracting qubits using collective spontaneous emission Mesoscopic entanglement of noninteracting qubits using collective spontaneous emission

2007-01-12

arxiv.org/abs/quant-ph/0701066v2

New J. Phys. 9, 408 (2007)

Physics

Quantum Physics

replaced; corrected per referee comments

Scientific paper

10.1088/1367-2630/9/11/408

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.

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