It seems like a low-research month! But at lunch time, Gia Dvali (NYU) gave us a very surprising black-board talk in which he compared a black-hole horizon (which contains an enormous number of microstates, implied by the black-hole entropy argument) to a quantum neural network with a particular kind of hamiltonian term on each edge. In the network, there is an occupation number for the states in which there is an exponential increase in the number of microstates, which he was arguing is similar to the huge increase in entropy when a black hole forms. That's interesting! But there was plenty of skepticism in the room about its significance. Discussion was heated, especially afterwards.
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