Generalized Sternheimer potential.
Generalization of Sternheimer potential to include wave functions involving spin in nonfactorable way, exhibiting approximate Hamiltonian
QUANTUM THEORY↗
Engineering topics
Epstein, S. T.
Publications and source records attributed to Epstein, S. T..
Variational methods and degenerate perturbation theory.
Variational methods for approximating perturbation effect on nondegenerate eigenvalue extended to degenerate case
PERTURBATION THEORY↗
Improvement of uncoupled Hartree-Fock expectation values for physical properties.
Improving uncoupled Hartree-Fock expectation values for atomic and molecular properties
HARTREE-FOCK CALCULATION↗
Time-dependent hypervirial theorems and the like for variational wave functions
Time dependent hypervirial theorem for variational wave functions - variational calculus
VIRIAL THEOREM↗
Electronic charge density in helium in the first order shielding approximation
Electronic charge density for ground state of helium as function of nuclear charge
NUCLEAR PHYSICS↗
What is H sub 0/ques/
Zero order Hamiltonian in perturbation theory for eigenvalue problems of atom in magnetic field
EIGENVALUE↗
Variational methods and degenerate perturbation theory
Variational methods and degenerate perturbation theory
PERTURBATION THEORY↗
Remarks on the calculation of the van der Waals energy.
Calculation of approximate expression for van der Waals energy with aid of variationally determined polarizabilities
VAN DER WAALS FORCE↗
Improvement of uncoupled Hartree-Fock expectation values for physical properties
Hartree-Fock calculation method as zero-order approximation for determining atomic and molecular second-order properties
PHYSICAL PROPERTY↗
Dipole matrix elements for helium in the first- order shielding approximation.
Dipole matrix elements for helium in first order shielding approximation as function of screening parameter
NUCLEAR SHIELDING↗
The Ground State Energy of a Molecule in the Adiabatic Approximation
Ground state energy of molecule in adiabatic approximation
GROUND STATE↗
Hypervirial theorems and the hellmann- feynman theorem in different coordinate systems.
Hypervirial theorems and Hellmann-Feynman theorem in different coordinate systems
VIRIAL THEOREM↗
Some remarks on the use of the variational principle for the second-order energy.
Second order energy correction calculated by Hylleraas variation principle with approximate zero order function, shows no relationship to true value
WAVE FUNCTION↗
An introduction to quantum electrodynamics
Introduction to quantum electrodynamics
QUANTUM ELECTRODYNAMICS↗
The parity operator and the fourier transform operator.
Explicit formulas in terms of coordinate and momentum operators for parity operator and Fourier transform operator
QUANTUM MECHANICS↗
Some remarks on the sternheimer potential
Generalization of Sternheimer potential to include wave functions with spin
POTENTIAL ENERGY↗
Gauge invariance of the hartree-fock approximation.
Gauge invariance of Hartree-Fock approximation in presence of nonlocal potentials
GAUGE INVARIANCE↗
Dipole matrix elements in helium in the first order shielding approximation
First order shielding approximation used to calculate off-diagonal matrix elements of dipole moment operator for helium
DIPOLE MOMENT↗