Original sentence: Although, a second vortex appears, this does not violate the conservation of the single flux quantum.Opposite to Abrikosov vortices in type-II superconductors, Josephson vortex has no normal core.Such vortex is therefore called a (Josephson) fluxon.Usually the Josephson vortex's supercurrents create magnetic field with the total flux equal to  --- a single flux quantum
Edited sentence: Although a second vortex appears, this does not violate the conservation of the single flux quantum.In contrast to Abrikosov vortices in type-II superconductors, a Josephson vortex has no normal core.Such a vortex is therefore called a (Josephson) fluxon.Usually the Josephson vortex's supercurrents create a magnetic field with the total flux equal to  --- a single flux quantum