Wednesday, July 3, 2013

1307.0411 (Seth Lloyd et al.)

Quantum algorithms for supervised and unsupervised machine learning    [PDF]

Seth Lloyd, Masoud Mohseni, Patrick Rebentrost
Machine-learning tasks frequently involve problems of manipulating and classifying large numbers of vectors in high-dimensional spaces. Classical algorithms for solving such problems typically take time polynomial in the number of vectors and the dimension of the space. Quantum computers are good at manipulating high-dimensional vectors in large tensor product spaces. This paper provides supervised and unsupervised quantum machine learning algorithms for cluster assignment and cluster finding. Quantum machine learning can take time logarithmic in both the number of vectors and their dimension, an exponential speed-up over classical algorithms.
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