In quantum mechanics, perturbation theory is a set of approximation schemes directly related to mathematical perturbation for describing a complicated...

forms in quantum field theory. Perturbation theory (quantum mechanics) describes the use of this method in quantum mechanics. The field in general remains...

corresponding quantum fields. Each interaction can be visually represented by a Feynman diagram according to perturbation theory in quantum mechanics. Quantum field...

methods for solving quantum problems where the perturbation cannot be considered small in perturbation theory and where quantum numbers are large. Correlating...

with other bodies) Perturbation theory (quantum mechanics), a set of approximation schemes directly related to mathematical perturbation for describing a...

theory is a type of approximation, or effective theory, for an underlying physical theory, such as a quantum field theory or a statistical mechanics model...

Møller–Plesset perturbation theory (MP) is one of several quantum chemistry post-Hartree–Fock ab initio methods in the field of computational chemistry...

mathematical formulations of quantum mechanics are those mathematical formalisms that permit a rigorous description of quantum mechanics. This mathematical formalism...

the energy levels of any defect states in the crystal. Perturbation theory (quantum mechanics) Computational chemistry Re: Why do electron shells have...

electromagnetism Perturbation theory (quantum mechanics) Physical cosmology Quantum chromodynamics Quantum complexity theory Quantum electrodynamics Quantum field...

Quantum Mechanics (French: Mécanique quantique), often called the Cohen-Tannoudji, is a series of standard ungraduate-level quantum mechanics textbook...

The timeline of quantum mechanics is a list of key events in the history of quantum mechanics, quantum field theories and quantum chemistry. 1801 – Thomas...

forces of nature are described within the framework of quantum mechanics and quantum field theory: the electromagnetic interaction, the strong force, and...

molecular orbital theory (MO theory or MOT) is a method for describing the electronic structure of molecules using quantum mechanics. It was proposed early...

made of many interacting particles. Microscopic here implies that quantum mechanics has to be used to provide an accurate description of the system. Many...

electoral systems also known as compensation a perturbation to an equation in perturbation theory (quantum mechanics) radiative correction oblique correction...

In physics, relativistic quantum mechanics (RQM) is any Poincaré covariant formulation of quantum mechanics (QM). This theory is applicable to massive...

Quantum thermodynamics is the study of the relations between two independent physical theories: thermodynamics and quantum mechanics. The two independent...

framework of quantum mechanics. A quantum theory of gravity is needed in order to reconcile general relativity with the principles of quantum mechanics, but difficulties...

all quantum physics, which includes quantum chemistry, quantum field theory, quantum technology, and quantum information science. Quantum mechanics can...

The Principles of Quantum Mechanics is an influential monograph on quantum mechanics written by Paul Dirac and first published by Oxford University Press...

laws of quantum mechanics. Quantum dynamics is relevant for burgeoning fields, such as quantum computing and atomic optics. In mathematics, quantum dynamics...

In quantum field theory, the quantum vacuum state (also called the quantum vacuum or vacuum state) is the quantum state with the lowest possible energy...

Unsolved problem in physics: Yang–Mills theory and the mass gap. Quantum particles described by the theory have mass but the classical waves of the field...

{q}}^{i}} used in Lagrangian mechanics with (generalized) momenta. Both theories provide interpretations of classical mechanics and describe the same physical...

applications to condensed matter physics, statistical mechanics, quantum statistical mechanics, and string theory. Statistical and condensed matter systems are...

Time-independent Perturbation Theory Chapter 8: The Variational Principle Chapter 9: The WKB Approximation Chapter 10: Scattering Chapter 11: Quantum Dynamics...

Its more modern version, the de Broglie–Bohm theory, interprets quantum mechanics as a deterministic theory, and avoids issues such as wave–particle duality...

Loop quantum gravity (LQG) is a theory of quantum gravity that incorporates matter of the Standard Model into the framework established for the intrinsic...

first in the relativistic quantum mechanics of electrons – quantum electrodynamics, elaborated on below. Today, gauge theories are useful in condensed matter...