# Quantum correlations in one-dimensional Wigner molecules

## TL;DR

This paper investigates the correlation properties of one-dimensional Wigner molecules formed by identical particles in a harmonic trap with inverse power law interactions, analyzing how these properties depend on particle number and interaction strength.

## Contribution

It provides a detailed analysis of correlation properties in one-dimensional Wigner molecules across different interaction regimes and particle numbers, including the limits as the interaction power approaches zero or infinity.

## Key findings

- Correlations are mainly manifested in the N lowest natural orbitals.
- Identification of parameter regimes where Wigner molecules form.
- Properties of Wigner molecules in the limit as the interaction power approaches infinity.

## Abstract

We studied one-dimensional systems formed by $N$ identical particles confined in a harmonic trap and subject to an inverse power law interaction potential $\sim|x|^{-d}$. The correlation properties of a Wigner molecule with the lowest energy are investigated in terms of their dependence on the number $N$ and the power $d$, including the limit as $d\rightarrow 0$. There are $N$-particle Wigner molecules with properties such that their correlations are mainly manifested in the $N$ lowest natural orbitals. The values of the control parameters of the system at which such states appear are identified. The properties of Wigner molecules formed in the limit as $d$ approaches infinity are also revealed.