Inside the quantum image recognition engine

Three different sets of input data are simplified using PCA. Single photons are injected into a random optical circuit to generate a complex quantum state. The simplified data is encoded onto this state, which then passes through a second interferometer to form the quantum reservoir. Photon detection reveals a boson sampling probability distribution, which is combined with the original image data and fed into a simple, trainable linear classifier to make predictions.

In their simulated system, image data is first simplified using a process called principal component analysis (PCA), which reduces the amount of information while preserving key features. A complex photonic state is generated, onto which this data is encoded, before being processed in the quantum reservoir —where interference between photons produces rich, complex patterns used for image recognition.

This system requires training only at the final stage—a simple linear classifier—making the overall approach both efficient and effective for accurate image recognition.

Date:
28 May 2025
Credit:
Sakurai et al., 2025
Share on: