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Momentum operator
In quantum mechanics, the momentum operator p̂ is the operator for measuring the momentum of particles.
Explanation
For three dimensions, the momentum operator is the vector
where
i Imaginary unit ℏ Reduced Planck constant ∇ Nabla operator
Alternative 1
For one dimension, the momentum operator is written as
where
i Imaginary unit ℏ Reduced Planck constant Differential operator