Jon Magne Leinaas (born 11 October 1946) is a Norwegian theoretical physicist.
He was a fellow at Nordita, and at CERN, and held a faculty position at the University of Stavanger, before he was appointed as a professor of theoretical physics at the University of Oslo in 1989.
Together with Jan Myrheim he discovered that in one and two spatial dimensions, there is a possibility of having fractional quantum statistics.
[3] This is of particular importance in two dimensions where fractional statistics particles, usually referred to as anyons,[1] play an important role in the theory of the fractional quantum Hall effect.
The duo shared the Fridtjof Nansen Excellent Research Award in Science in 1993.