matrix mechanics

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Related to matrix mechanics: wave mechanics

matrix mechanics:

see quantum theoryquantum theory,
modern physical theory concerned with the emission and absorption of energy by matter and with the motion of material particles; the quantum theory and the theory of relativity together form the theoretical basis of modern physics.
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Matrix mechanics

A formulation of quantum theory in which the operators are represented by time-dependent matrices. Matrix mechanics is not useful for obtaining quantitative solutions to actual problems; on the other hand, because it is concisely expressed in a form independent of special coordinate systems, matrix mechanics is useful for proving general theorems.

matrix mechanics

[′mā·triks mə′kan·iks]
(quantum mechanics)
The theory of quantum mechanics developed by using the Heisenberg picture and representing operators by their matrix elements between eigenfunctions of the Hamiltonian operator; Heisenberg's original formulation of quantum mechanics.
References in periodicals archive ?
In 1925 he developed developed a form of manipulation called matrix mechanics for the purpose.
Although there exist at least twelve such distinct methods [3, 4], including Dirac's relativistic wave mechanics and quaternionic quantum mechanics, the methods most commonly applied within physics and chemistry are wave mechanics and matrix mechanics.
Quantum mechanics originated with the work of Heisenberg, who recognized that the fundamentally observable properties of an atomic system are the frequencies and intensities of its spectral lines; he developed matrix mechanics with the intention to avoid recourse to quantities unobservable, such as the orbits in Bohr's theory.