For higher quantum numbers, the energy levels induced by this effect are degenerate, and leading to the commonly observed quadratic form, whose components are proportional to the polarizability tensor.
The fact that it does not affect the ground state can be derived heuristically from symmetry considerations or explicitly from the Wigner-Eckart theorem. In semiconductor heterostructures, a quantum-confined version of this effect occurs, which results from the enhancement of this effect by excitons. For higher quantum numbers, the energy levels induced by this effect are degenerate, and leading to the commonly observed quadratic form, whose components are proportional to the polarizability tensor. Particularly useful for analyzing molecular rotational spectra, for ten points, identify this effect from atomic physics, which consists of the splitting and shift of a spectral line into several components in the presence of an electric field.
The fact that it does not affect the ground state can be derived heuristically from symmetry considerations or explicitly from the Wigner-Eckart theorem.
Stark effect