Perturbation theory - Wikipedia
perturbation, in mathematics, method for solving a problem by comparing it with a similar one for which the solution is known. Usually the solution found in this way is only approximate. Perturbation is used to find the roots of an algebraic equation that differs slightly from one for which the roots are known.
Perturbation Definition & Meaning - Merriam-Webster
A "Sudden" Perturbation. A sudden perturbation is defined here as a sudden switch from one time-independent Hamiltonian \(H_0\) to another one \(H′_0\), the time of switching being much shorter than any natural period of the system.
PERTURBATION | English meaning - Cambridge Dictionary
Perturbation theory allows us to make statements about the Hamiltonian of the system using what we know about the well studied Hamiltonian. The well studied Hamiltonian could be the that of the simple harmonic oscillator in one,
Perturbation - Wikipedia
Perturbation theory is used in a wide range of fields, and reaches its most sophisticated and advanced forms in quantum field theory. Perturbation theory (quantum mechanics) describes the use of this method in quantum mechanics. The field in general remains actively and heavily researched across multiple disciplines.
PDF Lesson 23 Perturbation theory - Stanford University
Perturbation (biology), an alteration of the function of a biological system, induced by external or internal mechanisms; Perturbation function, mathematical function which relates the primal and dual problems; See also. Annoy, annoyance; Disturbance (disambiguation) Non-perturbative
PERTURBATION definition | Cambridge English Dictionary
PERTURBATION meaning: 1. worry 2. a small change in the regular movement of an object: 3. worry. Learn more.
Perturbation (astronomy) - Wikipedia
In quantum mechanics, perturbation theory is a set of approximation schemes directly related to mathematical perturbation for describing a complicated quantum system in terms of a simpler one.
Perturbation | Mathematics, Dynamics & Applications | Britannica
PERTURBATION definition: 1. worry 2. a small change in the regular movement of an object: 3. worry. Learn more.
PERTURBATION Definition & Usage Examples | Dictionary.com
This method, termed perturbation theory, is the single most important method of solving problems in quantum mechanics, and is widely used in atomic physics, condensed matter and particle physics. It should be noted that there are problems which cannot be solved using perturbation theory, even when the perturbation is very weak, although such ...
Perturbation Theory: Mathematics, Methods and Applications - Springer
Perturbation theory is another approach to finding approximate solutions to a problem, by starting from the exact solution of a related, simpler problem. A critical feature of the technique is a middle step that breaks the problem into "solvable" and "perturbation" parts.