👉 In quantum mechanics, a "huygensian" state is an eigenstate of the momentum operator and the angular momentum operator in a system described by the Schrödinger equation. This state has no coherent states associated with it, meaning that it cannot be described as a superposition of coherent states. In other words, it is not possible to create or destroy a particle from this state without changing its quantum state. In terms of wave function collapse, the term "huygensian"