We prove that in Thomas-Fermi-Dirac-von Weizsacker theory, a nucleus of charge Z>0 can bind at most Z+C electrons, where C is a universal constant. This result is obtained through a comparison with Thomas-Fermi theory ...

We demonstrated here that molecular redox films are electrochemical capacitive devices possessing specific field effect in which molecular moieties within films act as sensitive gates. We confirm that the field effect ...

In the present dissertation, some methods used in electronic structure calculations are discussed together with examples of applications. In Chapter 1, we start with the Hartree-Fock-Roothaan method deducing the equations ...

We observe experimentally a deviation of the radius of a Bose-Einstein condensate from the standard Thomas-Fermi prediction, after free expansion, as a function of temperature. A modified Hartree-Fock model is used to ...

The large Z Thomas-Fermi-Scott-Schwinger expansion for the total nonrelativistic binding energy of a neutral atom is used, together with the Bohr energy formula valid at Z = 1, to construct various Padé approximants among ...

Desde los primeros dias de la mecánica cuántica fue necesario desarrollar métodos aproximados que permitieran abordar cuantitativamente problemas que involucraran muchas partículas, pensemos por ejemplo en física atómica. ...