Emergent BCS regime of the two-dimensional fermionic Hubbard model: Ground-state phase diagram Youjin Deng, Evgeny Kozik, Nikolay V. Prokof'ev and Boris V. Svistunov EPL, 110 5 (2015) 57001 Published online: 16 June 2015 DOI: 10.1209/0295-5075/110/57001