3 ms·

keep in mind, world lines merge too

• lisper 17y ago
  Really? How?
  • cousin_it 17y ago
    http://en.wikipedia.org/wiki/Elitzur-Vaidman_bomb-tester http://en.wikipedia.org/wiki/Elitzur-Vaidman_bomb-tester
    • lisper 17y ago
      Sorry, I don't see any world lines merging there. Can you elaborate?
      • cousin_it 17y ago
        No. On sober thought I can't even understand what it would mean for world lines to merge. Sorry.
        • lisper 17y ago
          No worries. It actually is possible in principle for world lines to merge because all quantum interactions are in principle reversible. But the odds are so small as to be effectively indistinguishable from zero.