Abstract
We report the first experimental demonstration of quantum entanglement among ten spatially separated single photons. A near-optimal entangled photon-pair source was developed with simultaneously a source brightness of , a collection efficiency of , and an indistinguishability of between independent photons, which was used for a step-by-step engineering of multiphoton entanglement. Under a pump power of 0.57 W, the ten-photon count rate was increased by about 2 orders of magnitude compared to previous experiments, while maintaining a state fidelity sufficiently high for proving the genuine ten-particle entanglement. Our work created a state-of-the-art platform for multiphoton experiments, and enabled technologies for challenging optical quantum information tasks, such as the realization of Shor’s error correction code and high-efficiency scattershot boson sampling.
- Received 19 July 2016
DOI:https://doi.org/10.1103/PhysRevLett.117.210502
© 2016 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
Ten Photons in a Tangle
Published 15 November 2016
An entangled polarization state of ten photons sets a new record for multiphoton entanglement.
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