Presented By: Leinweber Center for Theoretical Physics
HET Seminar | Lifetimes of (near-)eternal false vacua
Aleksey Cherman (University of Minnesota)
Seminar link : http://myumi.ch/O4P7E
We're used to the idea that false vacua in quantum field theory can always decay with some finite rate. I'll explain why the title of the talk makes sense anyway by discussing some simple QFTs which have false vacua which can live an arbitrarily long time. Their lifetime is set by the short-distance details of the theory, rather than the familiar long-distance ingridients discussed in textbook presentations of false-vacuum decay. The talk will focus on examples in 2d and 4d, with the 4d example having the same propagating degrees of freedom as conventional QCD, and the (near) eternal false vacua will turn out to be consequences of (nearly exact) (d-3)-form global symmetries.
We're used to the idea that false vacua in quantum field theory can always decay with some finite rate. I'll explain why the title of the talk makes sense anyway by discussing some simple QFTs which have false vacua which can live an arbitrarily long time. Their lifetime is set by the short-distance details of the theory, rather than the familiar long-distance ingridients discussed in textbook presentations of false-vacuum decay. The talk will focus on examples in 2d and 4d, with the 4d example having the same propagating degrees of freedom as conventional QCD, and the (near) eternal false vacua will turn out to be consequences of (nearly exact) (d-3)-form global symmetries.
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