Security News > 2020 > November > Developing a quantum network that exchanges information across long distances by using photons

Researchers at the University of Rochester and Cornell University have taken an important step toward developing a communications network that exchanges information across long distances by using photons, mass-less measures of light that are key elements of quantum computing and quantum communications systems.

The development of such a quantum network -designed to take advantage of the physical properties of light and matter characterized by quantum mechanics - promises faster, more efficient ways to communicate, compute, and detect objects and materials as compared to networks currently used for computing and communications.

The array is engineered so that each pillar serves as a location marker for a quantum state that can interact with photons and the associated photons can potentially interact with other locations across the device-and with similar arrays at other locations.

This potential to connect quantum nodes across a remote network capitalizes on the concept of entanglement, a phenomenon of quantum mechanics that, at its very basic level, describes how the properties of particles are connected at the subatomic level.

"This is the beginnings of having a kind of register, if you like, where different spatial locations can store information and interact with photons," says Nick Vamivakas, professor of quantum optics and quantum physics at Rochester.

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