## A simple model, extracted using holography, of a domain wall between a confining and a de-confining phases and its velocity.

#### by Prof. Jacob Sonnenschein

*Tel Aviv University*

##### at Particles and Fields Seminar

Mon, 29 Jan 2024, 14:00

Sacta-Rashi Building for Physics (54), room 207

#### Abstract

In the context of theories with a first order phase transition, we propose a general covariant description of coexisting phases separated by domain walls using an additional order parameter-like degree of freedom. In the case of a holographic dual to a confining and a de-confing phases, the re- sulting model extends hydrodynamics and has a simple formulation in terms of an action and a corresponding energy-momentum tensor. The proposed description leads to simple analytic profiles of domain walls, including the surface tension density, which agree nicely with holographic numerical solu- tions. We show that for such systems, the domain wall or bubble velocity can be expressed in a simple way in terms of a perfect fluid hydrodynamic formula, and thus in terms of the equation of state. We test the predictions for various holographic domain walls.

Created on 22-01-2024 by Lublinsky, Michael (lublinm)

Updaded on 22-01-2024 by Lublinsky, Michael (lublinm)