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searching for Variational method (quantum mechanics) 11 found (25 total)

alternate case: variational method (quantum mechanics)

Helium atom (5,941 words) [view diff] no match in snippet view article find links to article

Historically, the first attempt to obtain the helium spectrum from quantum mechanics was done by Albrecht Unsöld in 1927. Egil Hylleraas obtained an accurate

Muffin-tin approximation (635 words) [view diff] no match in snippet view article find links to article

linear combinations of these wave functions are then determined by the variational method. Many modern electronic structure methods employ the approximation

Condensed matter physics (6,706 words) [view diff] no match in snippet view article find links to article

various material properties, and by applying the physical laws of quantum mechanics, electromagnetism, statistical mechanics, and other physics theories

Klein–Gordon equation (6,564 words) [view diff] no match in snippet view article find links to article

genuine symmetry. The Klein–Gordon equation can also be derived by a variational method, arising as the Euler–Lagrange equation of the action S = ∫ ( − ℏ

Uncertainty principle (19,249 words) [view diff] no match in snippet view article find links to article

Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics. It states that there is a limit to the precision with which certain

Multiple scattering theory (3,425 words) [view diff] no match in snippet view article find links to article

Kohn and Norman Rostoker derived this same theory using the Kohn variational method. It is called the Korringa–Kohn–Rostoker method (KKR method) for band

Jan Korringa (820 words) [view diff] no match in snippet view article find links to article

protégé of Niels Bohr, and who was a large influence on his interest in quantum mechanics. In 1952, Korringa went to the United States and accepted a full professorship

Sturm–Liouville theory (4,750 words) [view diff] no match in snippet view article find links to article

separable linear partial differential equations. For example, in quantum mechanics, the one-dimensional time-independent Schrödinger equation is a Sturm–Liouville

Richard Feynman (14,829 words) [view diff] no match in snippet view article find links to article

He is best known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of the superfluidity

Symmetry of diatomic molecules (7,820 words) [view diff] no match in snippet view article find links to article

Molecular symmetry is a fundamental concept in the application of quantum mechanics in physics and chemistry, for example, it can be used to predict or

Monte Carlo methods for electron transport (5,007 words) [view diff] no match in snippet view article find links to article

fluctuations around its classical path. This calculation is undertaken by a variational method using a trial potential to first order. The effective classical potential