Time travel theory avoids grandfather paradox

Time travel theory avoids grandfather paradox July 21, 2010 by Lisa Zyga http://www.physorg.com/news198948917.html This figure shows CTCs through (a) conventional and (b) post-selected teleportation. Image credit: Seth Lloyd, et al. (PhysOrg.com) — The possibility of going back in time only to kill your ancestors and prevent your own birth has posed a serious problem for potential time travelers, not even considering the technical details of building a time machine. But a new theory proposed by physicists at MIT suggests that this grandfather paradox could be avoided by using quantum teleportation and "post-selecting" what a time traveler could and could not do. So while murdering one's relatives is unfortunately possible in the present time, such actions would be strictly forbidden if you were to try them during a trip to the past. Please continue to read on link.