Quantum-enhanced learning of rotations about an unknown direction

We design machines that learn how to rotate a quantum bit about an initially unknown direction, encoded in the state of a spin- j particle. We show that a machine equipped with a quantum memory of $O(\mathrm{log}j)$ qubits can outperform all machines with purely classical memory, even if the size of...

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Bibliographic Details
Main Authors: Yin Mo, Giulio Chiribella
Format: Article
Language:English
Published: IOP Publishing 2019-01-01
Series:New Journal of Physics
Subjects:
Online Access:https://doi.org/10.1088/1367-2630/ab4d9a