The A.I. Alikhanyan National Science Laboratory (Armenian: Ա.Ի. Ալիխանյանի անվան Ազգային Գիտական Լաբորատորիա) is a research institute located in Yerevan, Armenia. It was founded in 1943 as a branch of the Yerevan State University by brothers Abram Alikhanov and Artem Alikhanian. It was often referred to by the acronym YerPhI (Yerevan Physics Institute). In 2011 it was renamed to its current name A.I. Alikhanyan National Science Laboratory.