Antimatter Transport – The ability to travel to an antimatter dimension.
The Negative Zone is the antimatter dimension of the Marvel universe. The Negative Zone was introduced in the Fantastic Four Annual #6. Reed Richards travels to the Negative Zone and discusses the properties of the Negative Zone in this issue.
Qward is a world in the DC universe antimatter dimension and the center of most plot lines involving the DC antimatter dimension. Qward was introduced in Green Lantern V2 #2.