# Josephson vortex

Usually the Josephson vortex's supercurrents create a magnetic field with the total flux equal to $\Phi_0$—a single flux quantum. Such a vortex is therefore called a (Josephson) fluxon. It has been shown that under certain conditions a propagating Josephson vortex can initiate another Josephson vortex. This effect is called flux cloning (or fluxon cloning). Although a second vortex appears, this does not violate the conservation of the single flux quantum.