Dartmouth Events

Physics and Astronomy Cosmology Seminar - Alexander Vikman

Title: "Price for NEC-Violation"

10/4/2013
2 pm – 3 pm
Wilder 102
Intended Audience(s): Public
Categories: Lectures & Seminars

Abstract:  In this talk I will discuss systems which violate the Null Energy
Condition. In particular, these models can serve as the Phantom Dark Energy. I will show that
any such system should have the Hamiltonian unbounded from below.
However, this Hamiltonian can possess a local minimum. The price for
the NEC-violation is the superluminal sound speed for the
perturbations around some backgrounds. Thus these models cannot be
UV-completed in the standard Wilsonian way.
 

For more information, contact:
Tressena Manning
tressena.a.manning@dartmouth.edu
603-646-2854
Permanent URL to this event: https://physics.dartmouth.edu/events/event?event=25646

Events are free and open to the public unless otherwise noted.