matrix mechanics definition of matrix mechanics in the Free Online Encyclopedia.

matrix mechanics: see quantum theory quantum 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 [′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.

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.

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