Last month, the Chinese team demonstrated they could send entangled photons from space to Earth.

We extend orthogonal optical coding, previously applied to multiuser classical communication networks, to entangled photons.

They stand for about a minute as entangled photons bombard their skin with the photoelectric effect.

This absolute self-calibration method is based on the time correlation of entangled photons pairs emitted in spontaneous parametric down conversion.

One exhibit displays a series of high-tech experiments in quantum physics including " Entangled Photons: Einstein's spooky action at work".

If quantum communications were like mailing a letter, entangled photons are kind of like the envelope: They carry the message and keep it secure.