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Quantum physics

Record set for linked photons


Particles that have linked quantum states, known as 'entangled' particles, can affect each other's states even if they are physically separated. Now scientists have set a record by entangling ten photons — two more than achieved previously.

Entangled particles should one day enable quantum computing and communications, but they are inefficient to produce. A team led by Jian-Wei Pan of the University of Science and Technology of China in Hefei created the ten entangled photons by running five photon pairs through a series of four polarizing beam splitters. They also developed a laser light source that produced their photon batches about 100 times faster than did previous tests.

Phys. Rev. Lett. 117, 210502 (2016)

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Record set for linked photons. Nature 540, 11 (2016).

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