nLab WKB method

Idea

A method for semiclassical approximation…

References

See also;

• Wikipedia, WKB approximation

An introduction to the formulation of the WKB method in symplectic geometry/geometric quantization is in the first section of:

• Sean Bates, Alan Weinstein, Lectures on the geometry of quantization, pdf

In relation to non-perturbative quantum field theory:

• Okuto Morikawa, Shoya Ogawa: Non-perturbative formulation of resonances in quantum mechanics based on exact WKB method [arXiv:2503.18741]