A momentum eigenstate is an eigenstate of the momentum operator. In one dimension it is a plane wave eikx with momentum eigenvalue ℏk.
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- Four-momentum operator
- Free-particle momentum convention
- Generalized eigenfunction
- Momentum representation in quantum mechanics
- Negative-norm photon state
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- Plane wave
- Quantum time-reversal operator
- Rigid translation from a momentum term in the Hamiltonian
- Translation covariance of a quantum field
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