ABSTRACT
So far in this book, apart from a brief discussion in section 1.5 on lineshapes, we have ignored the possibility of time dependence.
To allow for time dependence, it is postulated that state functions depending on coordinates q and time t satisfy the time-dependent Schrödinge equation () i ℏ ∂ Ψ n ( q , t ) ∂ t = H ^ Ψ n ( q , t ) https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315273334/90d251cd-96eb-444c-8581-8842f96b239c/content/eq1540.tif"/>
where Ĥ is the Hamiltonian set up according to the first postulate.
