Zakharov system

In mathematics, the Zakharov system is a system of non-linear partial differential equations, introduced by Vladimir Zakharov in 1972 to describe the propagation of Langmuir waves in an ionized plasma. The system consists of a complex field u and a real field n satisfying the equations

${\displaystyle {\begin{aligned}i\partial _{t}^{}u+\nabla ^{2}u&=un\\\Box n&=-\nabla ^{2}(|u|_{}^{2})\end{aligned}}}$

where ${\displaystyle \Box }$ is the d'Alembert operator.

See also

• Resonant interaction; the Zakharov equation describes non-linear resonant interactions.