Probability Density -- from Eric Weisstein's World of Physics

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Modern Physics "> Quantum Physics "> Quantum Mechanics "> General Quantum Mechanics v

Probability Density

Probability density is the probability of finding a wave packet in a given region of phase space. Let be a wavefunction. Then in momentum space, the probability is

(1)

and in position space,

(2)

Born Postulate, Probability Density Flux