Dynamics of density fluctuations in atomic nuclei

TL;DR

This paper investigates the behavior of density fluctuations in specific atomic nuclei using advanced nuclear interactions and computational methods, revealing their stochastic and short-range nature.

Contribution

It introduces a detailed analysis of density fluctuation dynamics in nuclei using chiral effective field theory and time-dependent coupled-cluster methods.

Findings

Density fluctuations are small-amplitude and fast.

Fluctuations are short-ranged and stochastic.

Two-particle-two-hole excitations drive these fluctuations.

Abstract

We study the spatiotemporal patterns of density fluctuations in $^{16,24}$O and $^{48}$Ca using nuclear interactions from chiral effective field theory and the time-dependent coupled-cluster method. We find that two-particle-two-hole excitations generate small-amplitude fluctuations that are fast, short-ranged and of stochastic character.