IQIM Virtual Seminar, May 8, 2020 – Ash Milsted

Speaker: Ash Milsted, IQIM Postdoctoral Scholar, Preskill Group
Title: Simulating the collapse of false-vacuum bubbles in spin chains

Abstract: It is possible that we live close to a local energetic minimum of the Standard Model, with an ever-present chance of catastrophic decay to the true minimum. We study the real-time collapse of a small bubble of false vacuum, on a true-vacuum background, in the vastly simpler setting of 1+1-dimensional spin chains, which nevertheless can capture key aspects if the physics involved. We construct spatially localized false-vacuum bubbles using an infinite Matrix Product State ansatz and simulate their time evolution, demonstrating inelastic scattering when the walls of the bubbles collide in an Ising-like chain. In contrast, the simplest candidate model -- the unmodified transverse-field Ising model with a small longitudinal field -- is seen to exhibit only elastic scattering, so that false-vacuum bubbles merely bounce back after collapsing.

[ApophaticCartesian]

Anyone know where to get a pdf of the abstract and paper?

[AeroSpMaven]

The NULL phase theory. Eg. Gravity, centrifugal.
Maybe black hole or maybe not. I don't know. I spoke my mind.