Wednesday, August 10, 2005

My future self when she travels back in time will not disrupt the path of my present self

Apparently, the laws of physics do permit time travel. There's a lot of paradoxes to grapple with, but a recent paper proposes a model in which they "may be ruled out by the weirdness inherent in laws of quantum physics," as summarized at

"If you travel into the past quantum mechanically, you would only see those alternatives consistent with the world you left behind you."


(But wait. Will I be able to act at all, or simply observe? If I'm travelling back to where the quantum waves recombine, will there be two of me, or will I be my past self? I need a nap.)
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