"BROOKLYN" QUANTUM MEETUP RETURNS THROUGH AN SYK WORMHOLE

This week we'll return to the subject of wormhole models. We'll briefly review the lessons we learned way back in May about how externally coupling two entangled black holes can lead to a traversable wormhole between them in a way quite analogous to quantum teleportation. The model we discussed then was a simple one based on qubits. This time around we'll build a slightly more complex model out of Majorana fermions with an SYK coupling. We'll cover the basics of how to play around with these Majorana fermions, how we can decompose normal fermions into pairs of Majorana's which can be joined up into yet other (normal) fermions, such that the vacuum state of the former will be an entangled state of the latter, and we'll use just such an entangled state for the two mouths of the wormhole. And so, among other things, there will be interesting interconnections to our previous discussions of the observer dependence of the vacuum.