There is an underlying assumption to this method that the total current or voltage is a linear superposition of its parts.
The principle of linear superposition can be applied to determine the resulting stress field as the solution to the integral equations:
Since Einstein's equations are non-linear, arbitrarily strong gravitational waves do not obey linear superposition, making their description difficult.
A pure qubit state is a linear superposition of the basis states.
Therefore, additional techniques such as linear superposition are often used to solve statically indeterminate beam problems.
All methods utilising linear superposition will fail when non-linear components are present.
A beam of convergent (or divergent) light is known to be a linear superposition of many plane waves over a cone of solid angles.
This is the principle of linear superposition in probability.
The most general pure state is the linear superposition of Fock states.
The amplitude A(k) contains the coefficients of the linear superposition of the plane-wave solutions.