Using localized lineral fields for momentum transfer in a spacetime bubble.

Using localized lineral fields for momentum transfer in a spacetime bubble. The concept and recent advances in understanding possible space time bubbles for superliminal travel has intrigued me. One of the key issues I see other than energy requirements is the process of momentum transfer or to use a perhaps crude term delta V. Bear with me with the eye rolling but hear me out. I have always been curious about cigar shapped UFP and have wondered why is that a thing? In reading one of the late...