Paper/Supersymmetry and Morse theory

Witten, Edward (1982). "Supersymmetry and Morse theory" (17(4)). J. Differential Geom.: 661-692. doi:10.4310/jdg/1214437492. 

Abstract

It is shown that the Morse inequalities can be obtained by consideration of a certain supersymmet- ric quantum mechanics Hamiltonian.Some of the implications of modern ideas in mathematics for supersymmetric theories are discussed.