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Saturday, January 28, 2012

Who believes in time travel?

The quantum mechanics of time travel through post-selected teleportation

This paper discusses the quantum mechanics of closed timelike curves (CTC) and of other potential methods for time travel. We analyze a specific proposal for such quantum time travel, the quantum description of CTCs based on post-selected teleportation (P-CTCs). We compare the theory of P-CTCs to previously proposed quantum theories of time travel: the theory is physically inequivalent to Deutsch's theory of CTCs, but it is consistent with path-integral approaches (which are the best suited for analyzing quantum field theory in curved spacetime). We derive the dynamical equations that a chronology-respecting system interacting with a CTC will experience. We discuss the possibility of time travel in the absence of general relativistic closed timelike curves, and investigate the implications of P-CTCs for enhancing the power of computation.

I believe the probability of being paid for purveying similar arrant non-sense may be calculated in a Monte Carlo simulation that would operate as a perpetuum mobile money making machine. Oh, sorry I forgot about the so-called "rocket scientist" quants on Wall Street that gave us the exotic derivative products. Hmm... is it just chance or could there be a connection here?

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