# Evaluation of Charged Particle Evaporation Expressions in Ultracold Plasmas

## TL;DR

This paper investigates whether existing charged particle evaporation models, developed for atomic gases, are applicable to ultracold neutral plasmas, finding that they are not due to violated assumptions.

## Contribution

The study critically evaluates the applicability of traditional evaporation theories to ultracold plasmas through numerical analysis, revealing fundamental limitations.

## Key findings

- Existing models do not accurately describe electron evaporation in ultracold plasmas.
- Fundamental assumptions of atomic gas evaporation theory are violated in ultracold plasma conditions.
- Implications for modeling electron temperature evolution in ultracold plasmas.

## Abstract

Electron evaporation plays an important role in the electron temperature evolution and thus expansion rate in low-density ultracold plasmas. In addition, evaporation is useful as a potential tool for obtaining colder electron temperatures and characterizing plasma parameters. Evaporation theory has been developed for atomic gases and has been applied to a one-component plasma system. We numerically investigate whether such an adapted theory is applicable to ultracold neutral plasmas. We find that it is not due to the violation of fundamental assumptions of the model. The details of our calculations are presented as well as a discussion of the implications for a simple description of the electron evaporation rate in ultracold plasmas.