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Quantum Memory Crystals Are a Step Towards Futuristic Internet

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This quantum memory is made from yttrium orthosilicate crystals.

A quantum memory made from a crystal could form a crucial part of a device able to transmit entangled photons over a distance of 5 kilometers.

Credit: ICFO

Hugues de Riedmatten and colleagues at Spain's Institute of Photonic Sciences have taken a step toward a secure quantum Internet by using crystals to execute quantum teleportation of information.

The researchers were able to store a pair of entangled photons in yttrium orthosilicate crystals for 25 microseconds in two separate quantum memories.

The experiment was conducted between two laboratories connected by 50 meters (164 feet) of fiber-optic cable; theoretically, 25 microseconds would allow communication between devices that are up to five kilometers (3.1 miles) apart.

The researchers stored and retrieved photons in the order of transmission, and sent them using frequencies and cables used in data networks.

From New Scientist
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Abstracts Copyright © 2021 SmithBucklin, Washington, DC, USA


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