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Momentum operator

In quantum mechanics, the momentum operator 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

 


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