abobrick

4 ms·

1. 1.▲
   by abobrick 5y ago

   The paper both provides new positive-energy solutions and improves existing negative-energy solutions.
2. 2.▲
   by abobrick 5y ago

   Very good paper. However, it doesn't overcome the problem of superluminal travel. Rather, one of the problems. There are other remaining fundamental physical issues related to FTL, including the need for superluminal matter, causality
3. 3.▲
   by abobrick 5y ago

   I believe spherically symmetric bubbles in subluminal regime are more interesting than any warp drive solutions suggested so far. Firstly, they do not require negative energy. Secondly, the passengers in such bubbles age less by the time th
4. 4.▲
   by abobrick 5y ago

   Indeed, a superluminal object will appear to have an infinite velocity for some physical observers.
5. 5.▲
   by abobrick 5y ago

   In principle, yes, for sure, we could detect it. For example, it would still generate gravity and be uniquely identifiable this way. But then, superluminal matter breaks causality, allows sending signals back in time and, to the best of our