Variations on a theme of nuclear matter

摘要: The authors review new techniques developed to apply the variational method nuclear matter problem. wave function is taken be ($S{\ensuremath{\Pi}}_{ilj}{\mathrm{F}}_{\mathrm{ij}}$) $\ensuremath{\Phi}$; correlation operators ${\mathrm{F}}_{\mathrm{ij}}$ can in principle induce central, backflow, spin isospin, tensor, etc. correlations, and $\ensuremath{\Phi}$ ideal Fermi gas function. application of diagrammatic cluster expansion chain summation calculate expectation values with such functions discussed detail. also give a brief overview various other approaches calculation binding energies quantum fluids, comparison results for simple systems ad helium liquids. Results obtained by methods simplified models matter, which include spin, tensor forces, have converged significantly recent months. more realistic spin-orbit potentials are discussed. potential considered so far either too little or high equilibrium density.