Polarizability tensor
= Polarizability tensor
{title2=$p_i^{\rm induced}=\sum_j\alpha_{ij}E_j$}
The linear response relating an induced <electric dipole moment> to an applied <electric field>. In ordinary nonresonant <Raman spectroscopy>, changes in its symmetric components during a <normal mode> determine activity. These components transform like $x^2,y^2,z^2,xy,xz,yz$.