------------------------------------------------------------ 


   RECORD NO.:  929060 INSPEC Abstract No: A76060544
       AUTHOR:  de Llano, M.; Plastino, A.
  CORP SOURCE:  Inst. de Fisica, Univ. de Mexico, Mexico
        TITLE:  Hartree-Fock states in the thermodynamic limit
       SOURCE:  Physical Review A (General Physics), vol.13, no.4, p. 1633-
                40
         ISSN:  0556-2791
        CODEN:  PLRAAN
PLACE OF PUBL:  USA
     LANGUAGE:  English
         YEAR:  April 1976
    TREATMENT:  T Theoretical or Mathematical
     ABSTRACT:  The energy is minimized, as a function of particle density 
                and coupling of a class of two-parameter single particle 
                orbitals which explicitly satisfy the full Hartree-Fock 
                equations for occupied states in the thermodynamic limit. A 
                delta -function internucleon potential yields stabler states 
                than the plane-wave Hartree-Fock solutions, for sufficiently 
                strong coupling and/or high density. Minimizing the energy 
                with respect to the free parameters gives either first- or 
                second-order transitions, with bifurcation of the new energy 
                state from the old. The relevance of the model to neutron 
                star and nuclear star matter, to the possibility of 
                Pauling's 'close-packed spheron' structure, and to the 
                electron-gas problem is discussed (10 Refs.)
  DESCRIPTORS:  Hartree-Fock method; neutron stars; nuclear forces; nuclear 
                theory
  IDENTIFIERS:  thermodynamic limit; particle density; strong coupling; high 
                density; neutron star; nuclear star matter; two parameter 
                single particle orbitals; Hartree Fock equations; delta 
                function internucleon potential; electron gas; Paulings 
                close packed spheron
  CLASS CODES:  A2130 (Nuclear forces); A2160J (Hartree-Fock and random-
                phase approximations in nuclei); A9530 (Fundamental aspects 
                of astrophysics)
 
------------------------------------------------------------