Yes, but the energy involved would be ridiculous.
What is going back in time? Putting every relevant molecule except your own back where they were X seconds, minutes, hours, days or whatever.
If you could find "the center of the universe" and the equivalent of some sort of super magnet that put everything back in its place (and we're talking food that was eaten, pulling corpses out of the ground and hauling back dessicated atoms of flesh and the like...), you'd have gone back in time.
But we're talking here enough energy to reverse "the Big Bang". Unless the universe is going to collapse back in upon itself at some point*, I don't see it happening any time soon.
Perhaps someone could find a way to do a localized version - say, with a few properly placed black holes? In that case though, the fun would be in stopping the reversal of time...
* In which case, the Battlestar Galactica mantra "this has all happened before and will happen again" takes on new meaning...