johann1301 Messages 216 Reaction score 1 Thread starter Sep 18, 2014 #1 Is there gravity between two photons?
PeterDonis Mentor Insights Author Messages 50,513 Reaction score 26,561 Sep 18, 2014 #2 If they are not moving in the same direction, yes. See this post from a previous PF thread: https://www.physicsforums.com/showpost.php?p=4824743&postcount=12
If they are not moving in the same direction, yes. See this post from a previous PF thread: https://www.physicsforums.com/showpost.php?p=4824743&postcount=12
dextercioby Science Advisor Insights Author Messages 13,419 Reaction score 4,227 Sep 18, 2014 #4 There's also an argument in Zee's QFT book, pages 427-428.