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A Quantum Trick with Photons Gives ML a Speed Boost

By New Scientist

March 16, 2021

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Researchers at Austria's University of Vienna have accelerated machine learning using a quantum trick involving photons.

The experiment entailed having a photon traveling through a waveguide and ending up in one of four possible states, with artificial intelligence (AI) ensuring the photon ended up in one particular state.

In a classical setup, the AI would only be able to move the photon to one specific state at a time, and would be rewarded for making a correct guess.

For the quantum iteration, the AI could place the photon in a superposition of multiple states, and narrow to the correct answer before making a final, classical guess at the goal state.

The new approach expedited the AI's learning time 63%, from 270 guesses to 100.

From New Scientist
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