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Poster Session

Poster Session II

4:00 pm – 6:00 pm, Wednesday June 18 Session H00 Oregon Convention Center, Exhibit Hall E
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Experimental realization of associative memory in a quantum-optical spin glass

Poster 64
Presenter: Giulia Socolof (Stanford University)
Authors: David Atri Schuller (Stanford University), Brendan Marsh (Stanford University), Yunpeng Ji (Stanford University), Henry Hunt (Stanford University), Jonathan Keeling (University of St Andrews), Sarang Gopalakrishnan (Princeton), Benjamin Lev (Stanford University), Deven Bowman (Stanford University)

Associative memory refers to a content addressable memory that dynamically pattern-corrects erroneous input states. We demonstrate an associative memory in a quantum-optical setting by employing ultracold clouds of atoms coupled via photonic interactions in a mode-degenerate optical cavity. Holographic imaging of input and output cavity light provides microscopic access to the spin glass states. We show that operation of this device in a spin glass regime outperforms the memory capacity of the seminal Hopfield model. We demonstrate memories in 20-site networks and show that we can store and pattern-recall up to 18 memories in an N = 16 spin network. The operation in the spin glass regime challenges the notion that associative memory breaks down in a glass. We describe why this occurs and propose future explorations of quantum-optical spin glasses and neural networks.

Funding acknowledgement

We thankfully acknowledge funding from ARO.

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