Physics and Astronomy Cosmology Seminar - Alexander Vikman

Dartmouth Events

Physics and Astronomy Cosmology Seminar - Alexander Vikman

Title: "Price for NEC-Violation"

Friday, October 4, 2013
2:00pm-3:00pm
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
603-646-2854

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