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Thursday, September 07, 2017
12:30 PM - 1:30 PM
T-DO Conference Room

Quantum Lunch

Machine learning in classical and quantum many-body physics

Juan Carrasquilla
D-Wave systems

I will discuss how artificial neural networks can be used to identify phases and phase transitions in condensed matter systems via supervised learning. I will show that standard feed-forward neural networks can be trained to detect multiple types of order parameter directly from raw state configurations sampled with Monte Carlo. In addition, they can detect highly non-trivial states such as Coulomb phases, and if modified to a convolutional neural network, topological phases with no conventional order parameter. Furthermore, I will discuss the application of machine learning ideas to quantum systems. In particular, I will demonstrate that convolutional neural networks (CNN) have the potential to represent ground states of quantum many-body systems by showing that the ground state of Kitaev's toric code can be written as a CNN. Lastly, I will briefly show that machine learning devices such as the restricted Boltzmann machine can be efficiently used for quantum state tomography of highly-entangled states in arbitrary dimension.

Host: Lukasz Cincio