A highly developed microscopic theory of the helium liquids exists based on the Schrödinger equation involving realistic forms of the interaction potential between pairs of neutral atoms. This report is a tutorial review of the microscopic theory with emphasis on the method of correlated basis functions. Among the topics considered are potentials, distribution functions, consequences of the correspondence principle, working approximations for the three-particle distribution function, useful matrix elements, sum rules, the paired-phonon function space, trial forms for the ground state of the boson system, distribution of particles in momentum space, elementary excitations, basis functions, and matrix elements for liquid He3 and for the dilute solution of He3 in liquid He4.
No takes yet. Share an insight, caveat, or question.
Eugene Feenberg (1970) studied this question.