Research ArticlesPhysics

Deterministic generation of a cluster state of entangled photons

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Science  28 Oct 2016:
Vol. 354, Issue 6311, pp. 434-437
DOI: 10.1126/science.aah4758

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Weaving an entangled cluster

Entanglement is a powerful resource for quantum computation and information processing. One requirement is the ability to entangle multiple particles reliably. Schwartz et al. created an on-demand entangled cluster state of several photons by addressing a quantum dot with a sequence of laser pulses (see the Perspective by Briegel). They used an internal state of the quantum dot, a dark exciton, and its association with another internal state, a biexciton, to weave successive photons into an entangled cluster, generating entanglement between up to five photons.

Science, this issue p. 434; see also p. 416

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