1/N-expansion

1/N-expansion

[¦wən ‚ō·vər ¦en ik′span·chən]
(physics)
The grouping of scattering processes in a power series in 1/ N, where N, assumed to be large, is the degeneracy of some quantum state such as the ground state of an impurity center in a solid, of the number of equivalent colors of quarks.