# Quark Matter 2018

13-19 May 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

## Entanglement and thermalization

15 May 2018, 16:20
20m
Sala Volpi, 1st Floor (Palazzo del Casinò)

### Sala Volpi, 1st Floor

#### Palazzo del Casinò

Parallel Talk Thermodynamics and hadron chemistry

### Speaker

Stefan Floerchinger (Heidelberg University)

### Description

In a quantum field theory, apparent thermalization can be a consequence of entanglement as opposed to scatterings. I will discuss how this can help to explain open puzzles such as the success of thermal models in electron-positron collisions. It turns out that an expanding relativistic string described by the Schwinger model (which also underlies the Lund model) has at early times an entanglement entropy that is extensive in rapidity. At these early times, the reduced density operator is of thermal form, with an entanglement temperature $T_\tau=\hbar/(2\pi k_B \tau)$, even in the absence of any scatterings.

Content type Theory Presenter name already specified

### Primary author

Stefan Floerchinger (Heidelberg University)

### Co-authors

Jürgen Berges (Heidelberg University) Raju Venugopalan (Brookhaven National Laboratory)