Even short of skepticism of this particular effort, I'm wondering if the author has a complete understanding of the subject. For example, a drive incorporating

Even short of skepticism of this particular effort, I'm wondering if the author has a complete understanding of the subject. For example, a drive incorporating negative mass-energy wouldn't be able to function through repulsion alone, otherwise it would fly apart. Negative mass-energy also creates catastrophic problems for current theories of physics. Catastrophic, as in, it would spark vacuum decay and cause the end of the universe.