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Lead researcher Dr Gordey Lesovik said by putting scattered electrons back into their original shape they had effectively created a state which went against the 'direction of time'
Scientists have reversed the direction of time with a quantum computer. The breakthrough study seems to contradict basic laws of physics and could alter our understanding of the processes governing the universe. In a development that also represents a major advance in our understanding of quantum computers, by using electrons and the strange world of quantum mechanics, researchers were able to turn back time in an experiment that is the equivalent of causing a broken rack of pool balls to go back into place.
According to a new pair of studies in the journal Monthly Notices of the Royal Astronomical Society, there’s a decent chance that life-fostering planets could exist in a parallel universe — even if that universe were being torn apart by dark energy.
In the new study, researchers ran a massive computer simulation to build new universes under various starting conditions. They found that the conditions for life might be a little broader than previously thought — especially when it comes to the mysterious pull of dark energy.
Across several experiments, an international team of researchers from England, Australia and the Netherlands used a program called Evolution and Assembly of Galaxies and their Environmentsto simulate the birth, life and eventual death of various hypothetical universes. In each simulation, the researchers adjusted the amount of dark energy present in that universe, ranging from none to several hundred times the amount in our own universe.
The good news: Even in universes with 300 times as much dark energy as ours, life found a way.
"Our simulations showed that the accelerated expansion driven by dark energy has hardly any impact on the birth of stars, and hence places for life to arise," study co-author Pascal Elahi, a research fellow at the University of Western Australia, said in a statement. "Even increasing dark energy many hundreds of times might not be enough to make a dead universe."
That's good news for fans of extraterrestrial life and the multiverse theory. But a bigger question remains: If galaxies could still thrive on so much dark energy, why did our universe get handed such a seemingly small amount?
The universe appears to us to exist in three dimensions of space and one of time—a geometry that we will refer to as the “three-dimensional universe.” In our scenario, this three dimensional universe is merely the shadow of a world with four spatial dimensions.
Speciﬁcally, our entire universe came into being during a stellar implosion in this suprauniverse, an implosion that created a three-dimensional shell around a four-dimensional black hole. Our universe is that shell.
originally posted by: 00018GE
Didn't the "delayed choice, double slit experiment" already send information back in time?
As Scott Aaronson, director of the Quantum Information Center at the University of Texas at Austin, says, “If you’re simulating a time-reversible process on your computer, then you can ‘reverse the direction of time’ by simply reversing the direction of your simulation. From a quick look at the paper, I confess that I didn’t understand how this becomes more profound if the simulation is being done on IBM’s quantum computer.”
originally posted by: dubiousatworst
Meanwhile, I can pull up files from 2010 on an old hard drive. Is that time travel too?
Being able to revert to a previous state is a really big stretch to claim it as being time travel.
originally posted by: moebius
All I am reading is that they've devised an experiment to get a couple of qubits to return into their original state. No time travel is involved at all.
Also what they have is a tiny system of two or three qubits and the complexity of the "time reversal" grows polynomially.
The "time machine" described in the journal Scientific Reports consists of a rudimentary quantum computer made up of electron "qubits". A qubit is a unit of information described by a "one", a "zero", or a mixed "superposition" of both states.
In the experiment, an "evolution program" was launched which caused the qubits to become an increasingly complex changing pattern of zeros and ones. During this process, order was lost – just as it is when the pool balls are struck and scattered with a cue. But then another program modified the state of the quantum computer in such a way that it evolved "backwards", from chaos to order.
It meant the state of the qubits was rewound back to its original starting point. Most laws of physics work both ways, in the future and the past. If you see a video of a pool ball knocking into another one, for instance, and then reverse that same video, the physical processes would both make sense and it would be impossible at the level of physics to know which way around would be correct.
But the universe does have one rule that goes only in one way: the second law of thermodynamics, which describes the progression from order to disorder. If you saw a video of someone breaking a perfectly arranged triangle of pool balls into a mess, for instance, then watching that backwards would obviously look nonsensical.
The new experiment is like giving the pool table such a perfectly calculated kick that the balls rolled back into an orderly pyramid.
This paper will begin with a short review of the Alcubierre warp drive metric and describes how the
phenomenon might work based on the original paper. The canonical form of the metric was developed
and published in  which provided key insight into the field potential and boost for the field which
remedied a critical paradox in the original Alcubierre concept of operations. A modified concept of
operations based on the canonical form of the metric that remedies the paradox is presented and
discussed. The idea of a warp drive in higher dimensional space-time (manifold) will then be briefly
considered by comparing the null-like geodesics of the Alcubierre metric to the Chung-Freese metric to
illustrate the mathematical role of hyperspace coordinates. The net effect of using a warp drive
“technology” coupled with conventional propulsion systems on an exploration mission will be discussed
using the nomenclature of early mission planning. Finally, an overview of the warp field interferometer
test bed being implemented in the Advanced Propulsion Physics Laboratory: Eagleworks (APPL:E) at the
Johnson Space Center will be detailed. While warp field mechanics has not had a “Chicago Pile” moment,
the tools necessary to detect a modest instance of the phenomenon are near at hand.