Quantum communications tagged posts

Researchers Develop World’s Smallest Quantum Light Detector on a Silicon Chip

University of Bristol researchers develop world's smallest quantum light detector on a silicon chip
The silicon ePIC quantum chip, mounted on a printed circuit board for testing and similar to a motherboard inside a personal computer. Credit: University of Bristol

Researchers at the University of Bristol have made an important breakthrough in scaling quantum technology by integrating the world’s tiniest quantum light detector onto a silicon chip. The paper, “A Bi-CMOS electronic photonic integrated circuit quantum light detector,” was published in Science Advances.

A critical moment in unlocking the information age was when scientists and engineers were first able to miniaturize transistors onto cheap micro-chips in the 1960s.

Now, for the first time, University of Bristol academics have demonstrated the integration of a quantum light detector—smaller than a human hair—onto a s...

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Toward Metropolitan Free-Space Quantum Networks

Towards metropolitan free-space quantum networks
Metropolitan entanglement-based free-space network. a) A standardized centrally located entanglement server (ES, black box) is streaming entangled photons into the network. Free-space channels are used to connect distant buildings and parts of a metropolitan area, while fiber connections may still be used in a complementary way, for example, to connect to offices within the central building. Each end user owns an application-specific quantum receiver subsystem (green boxes). b) The corresponding physical layer network topology. At the quantum communication layer, the network is a pairwise connected mesh, so that every end user can communicate with any other (not shown). c) A near-term extension possibility using several ESs and a central trusted node...
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