Monday, December 28, 2015

Quantum Time Travel Paradox Solved: Study

(Fred Mantle/iStock)

I suspect this applies to all time paradox problems.  It is all about isolation.  As i posted a few weeks ago, the Earth was deliberately manufactured by the expedient of an artificial moon arriving and then dumping itself and the Earth back four Billion years.  Further intercessions followed as well all then in the past from a location in the present or plausibly in the near present.

All the same concerns would have applied but the sheer remoteness space and time allowed a full development to be completely isolated.  In the present we do have plausible reports of time travelers penetrating our present from our near future and i know enough myself to begin investigation.  Thus it is even plausible.

Thus the way forward is all about managed isolation and perhaps one day we will go and terraform a barren planet somewhere else...

Quantum Time Travel Paradox Solved: Study

By Tara MacIsaac, Epoch Times | December 12, 2015

Last Updated: December 13, 2015 7:34 am

In Beyond Science, Epoch Times explores research and accounts related to phenomena and theories that challenge our current knowledge. We delve into ideas that stimulate the imagination and open up new possibilities. Share your thoughts with us on these sometimes controversial topics in the comments section below.

If a person travels back in time and kills her own mother, well that’s pretty sinister—but it also creates for her an existential paradox. How does she exist if her mother doesn’t give birth to her?

Quantum computing theory was plagued by a similar paradox. It could be used to solve very complex mathematical problems, but to do so could seriously mess with time.

An international team of scientists has developed a way, however, for quantum computing to use time travel without breaking causality. They published their study Nov. 24 in the journal Quantum Information.

The key is using open timelike curves (OTCs) instead of closed timelike curves (CTCs). Both are time-loops, which are made possible within Albert Einstein’s General Relativity theory by traveling through wormholes.

The CTCs create causal paradoxes, similar to the woman killing her mother in the past. This happens because an object entering a wormhole can interact with causal factors in its own past. But, in the case of OTCs, the object cannot interact with those factors. 

“[It] is completely isolated from anything that can affect its own causal past during the time-traveling process,” the study states. “This naturally occurs, for example, in instances where the wormhole mouths are spatially separated.” [See a diagram here

So how does this help solve complex equations?

Foundational constraints of quantum theory are broken. For example, “the uncertainty principle can be violated, and arbitrary unknown quantum states can be cloned to any fixed fidelity,” the study explains. Scientists are able to bend the rules that make solving some equations seemingly impossible, thus making the solutions possible.

Before the recent findings, it was thought that this rule-bending brought with it the paradox of broken causality.

With OTCs, however, the study explains: “The time-traveling particle has the potential to break causality, [but] its complete isolation ensures that causality never actually breaks.” The rules can still be bent to solve the equations, but the paradox of broken causality is avoided.

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