España.- An international group of researchers, led by University of Singapore, has just demonstrated that many problems of quantum physics, today unsolvable, could easily be solved with a quantum computer that travel through “open time curves”. The work, which has raised great expectations in the scientific community, is published in Nature Quantum Information.
A decade ago that physical Dave Bacon, who now works for Google, showed that the best way to solve Quickly whole group of problems in physics (called NP-complete) and head bringing mathematicians, was using a quantum computer that would shift over time. The reason? The hypothetical computer Bacon could move freely through a series of “sharp turns of time,” shortcuts in the fabric of spacetime that curve about themselves. General relativity in effect, allows such paths may exist through contortions in space-time known as wormholes.
But why send a message in time and to lock after nobody can read your content? Simply because the procedure could be the key that is needed to solve problems that currently have no solution. And it is that even a message “unopened” can be extremely useful, especially if scientists “intertwined” the message with another system before sending it.
As you know, quantum entanglement is a strange effect which is possible only in the world of subatomic physics, and is a sort of “instant communication” between particles, as if they were twins tiny, “they know” instantly what happened to the other entangled particles and react instantly, regardless of the distance separating them. And what the researchers propose is just that, creating an interweaving between the message sent through time and the laboratory system. A correlation that could feed and enhance quantum computing.
However, temporary curves closed involve many problems. In general, physicists believe that although they are theoretically possible, something must be preventing such time shifts occur in nature. Otherwise, they argue, there could be all kinds of paradoxes, including classical someone could travel back in time and kill your grandfather, preventing their existence.
It’s not just the family that would be threatened by a travel case. Indeed, breaking the temporal flux, leaving aside the principle of causality (one event causes another, it causes another and another …) may also have implications for quantum physics itself. Over the past two decades, researchers have shown again and again that the very principles on which is based quantum physics are broken into pieces in the presence of closed timelike curves. For example, you can break the uncertainty principle, which states the impossibility of knowing at the same time certain pairs of physical quantities of a particle (such as speed and time). Or even put aside the no cloning theorem, which says that the quantum states can not be copied and is one of the most solid pillars of quantum mechanics.
Avoiding paradoxes
But the new work shows that a quantum computer would be able to solve problems hitherto unsolvable if instead of by hairpin bends, you will travel through “open time curves” which do not create problems of causality described above. This is because these curves do not allow direct interaction with anything in the past the object itself: the traveling particle of time (or, to be more exact, the data they contain) never would interact with themselves
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Pra Mila Gu, of the University of Singapore and director of research, thus “avoid the classic paradoxes, such as grandparents, although we getting all these strange results”.
” Every time we present the idea affirms meanwhile Jayne Thompson, coauthor of the investigation everyone says there is no way that this could have an effect. ” But there is. The thus sent through a time loop can actually gain enormous power particles “super computer” even if nothing ever interact with the past. “The reason is because some data is stored in the correlations of intertwined: and this is precisely what we are making,” says Thompson
However, not all physicists think that these timelines. open are more likely to manifest in the physical lines that closed universe. And they may be right. One of the main arguments against the existence of closed timelike curves is that no one, to our knowledge, has never visited us from the future. An argument that, at least, is not valid with open time curves, since in them any message from the future would be blocked.
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