@article {guenther2020,
	title = {Mobile impurity in a Bose-Einstein condensate and the orthogonality catastrophe},
	journal = {arXiv:2004.07166},
	year = {2020},
	note = {submitted to Phys. Rev. Lett.},
	author = {Nils-Eric Guenther and Richard Schmidt and Georg M. Bruun and Gurarie, Victor and Pietro Massignan}
}
