Gravitational-wave detection

Entanglement at work

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The Einstein–Podolsky–Rosen type of quantum entanglement can be used to improve the sensitivity of laser interferometer gravitational-wave detectors beyond the quantum limit.

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Figure 1: In the lower panel, two entangled beams (yellow and red) are injected into the output port of a laser interferometer gravitational-wave detector (upper panel).


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Correspondence to Raffaele Flaminio.

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Flaminio, R. Entanglement at work. Nature Phys 13, 723–724 (2017) doi:10.1038/nphys4152

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