Open quantum behaviour manifested in the double-slit experiment L. S. Marinho, O. P. de Sá Neto, Marcos Sampaio, Helder A. S. Costa and I. G. da Paz EPL, 143 4 (2023) 40001 Published online: 23 August 2023 DOI: 10.1209/0295-5075/aceeaa