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

# Cobi Sonnenschein (TAU)

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When:

October 25, 2022 @ 12:00 pm – 1:00 pm

2022-10-25T12:00:00+03:00

2022-10-25T13:00:00+03:00