A mixture of states is an convex combination of states, i.e.

ρ = ∑jpjρj where

jpj = 1 and the pj ≥ 0 are real.

Physically this corresponds having state ρj with probability pj.

All mixed states can be written as a mixture of pure states.

See also

Category:Quantum States Category:Mathematical Structure

Last modified: 
Monday, October 26, 2015 - 17:37