Wormhole

A wormhole is a structure linking separate points in spacetime. It can connect any two points within a universe, or even different universes, or different points in time. It is a method for instantaneous travel once faster-than-light methods are too slow for vast interstellar or intergalactic distances.

In the second picture, two black holes are linked by teleporting quantum entanglement inside their singularity then use a d-brane breach to use antimatter to open each end and create folded space between.