Fermionic properties of two interacting bosons in a two-dimensional harmonic trap

TL;DR

This paper investigates how two interacting bosons in a 2D harmonic trap exhibit fermion-like properties in the strong, short-range interaction limit, comparing their ground state characteristics with noninteracting fermions.

Contribution

It demonstrates that strongly interacting bosons mimic fermionic properties in a 2D harmonic trap, highlighting the transition in their density and correlation functions.

Findings

Density profile of bosons resembles fermions in strong interaction limit

Correlation functions become similar for bosons and fermions with increased interaction

Ground state energy contributions vary with interaction strength and range

Abstract

The system of two interacting bosons in a two-dimensional harmonic trap is compared with the system consisting of two noninteracting fermions in the same potential. In particular, we discuss how the properties of the ground state of the system, e.g., the different contributions to the total energy, change as we vary both the strength and range of the atom-atom interaction. In particular, we focus on the short-range and strong interacting limit of the two-boson system and compare it to the noninteracting two-fermion system by properly symmetrizing the corresponding degenerate ground state wave functions. In that limit, we show that the density profile of the two-boson system has a tendency similar to the system of two noninteracting fermions. Similarly, the correlations induced when the interaction strength is increased result in a similar pair correlation function for both systems.