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First electronic-photonic quantum chip manufactured in commercial foundry
For the first time, scientists have built a tiny photonic quantum system into a traditional electronic chip. This photonic-electronic integration enables the single chip to reliably produce a stream of photon pairs — basic units that encode quantum information — required for light-based quantum communication, sensing and processing.
Kramnik, who led the circuit design and electronic integration, is a recent Ph.D. graduate from the laboratory of Vladimir Stojanovíc, an adjunct professor of electrical engineering and computer sciences at UC Berkeley. To control these tiny variations, researchers have relied on large, external equipment to stabilize quantum optical devices — making it seemingly impossible to miniaturize full systems. In a 2006 study published in the journal Optics Express, Kumar and his collaborators demonstrated, for the first time, that shining a concentrated beam of light into tiny, appropriately designed channels etched in silicon naturally generates photon pairs.
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