Ian Colin Percival (born 1931) is a British theoretical physicist.
[2] Numerical explorations performed by other researchers clearly confirmed this idea later.
In 1987, with Franco Vivaldi, he used the algebraic number theory of quadratic number fields to count the periodic orbits in generalized Arnold-Sinai cat maps.
Together with Walter Strunz, he suggested the properties of the quantum foam at the Planck scale (similar to the movement of particles due to Brownian motion) in the wave function of an atom-beam interference.
In 1999 he was awarded the Paul Dirac Medal and Prize by the Institute of Physics.