We study the Hong-Ou-Mandel interference of two identical, composite particles, each formed of two bosonic or fermionic constituents, as they scatter against a potential barrier in a one-dimensional lattice. For tightly bound composites, we show that the combination of their constituents' mutual interactions and exchange symmetry gives rise to an effective nearest-neighbour interaction between composites, which induces a reduction of the interference contrast.
@article{arxiv.2307.09222,
title = {Hong-Ou-Mandel interference of composite particles},
author = {Mama Kabir Njoya Mforifoum and Andreas Buchleitner and Gabriel Dufour},
journal= {arXiv preprint arXiv:2307.09222},
year = {2023}
}