Sending a carrier pigeon through the cosmos would probably be a more reliable way to send a message. If you want to send a message through a wormhole, you should be brief. Under certain circumstances, a message could be passed through a theoretical wormhole connecting black holes in different universes, as physicists have found in a new study.

Unfortunately, their results show that only a tiny amount of information (measured in quantum bits or qubits) could be exchanged. In our special setup we have found disappointing results in the sense that you can only send one or two qubits or some information through the wormhole, “said Sam van Leuven, co-author of the new article and a researcher at the University of the Witwatersrand inJohannesburg, said Live Science.

When you send something into a black hole, it usually lands in the middle, at an infinitely dense point known as a singularity, and never returns to its former life. But if a black hole through a wormhole were connected to another black hole and the trajectory of the message were just right, it could theoretically cross and exit the other side of that wormhole – which could be in an alternate universe. For this, both universes and the connected black hole must have a certain kind of physics and geometry. For example, the traversable wormhole would only be possible if spacetime had a negative curvature.

That is, you can think of space-time as a giant saddle in which two creatures, when trying to walk in parallel, would actually move away from each other. Scientists know that this particular universe arrangement theoretically allows for passing information about wormholes, and they have previously made some estimates to determine how much information can be transmitted in this way.

We now know from [previous studies] that this process is similar to quantum teleportation … but there are limits to how much information can be sent, “said Aron Wall, a researcher at Cambridge University’s Institute of Applied Mathematics and Theoretical Physics,which was not involved in the new study. (In quantum teleportation, information involving quantum-entangled particles can be transmitted almost instantaneously over long distances, meaning that their states link independently of the distance that separates them

In the new study, Van Leuven and his colleagues examined the traversable wormhole using space-time geometry as described in Albert Einstein’s Theory of General Theory of Relativity. The math used to describe the scenario was done in a two-dimensional universe for simplicity, but it should also apply to a 3D universe like our own. The results showed that little information could be passed through the wormhole at the same time – less than other methods had found. They also found that sending messages through the wormhole would alter the black holes.

The sending black hole would increase in mass with each message sent and the receiving black hole would decrease in mass. With the first message, the receiving black hole would lose about 30% of its mass, and with subsequent news, the black hole would disappear. In addition, any subsequent message would lose size, so the message would eventually contain no information.

Van Leuven and other scientists continue to engage in a variety of constructions and rules that are similar and dissimilar to those of our own universe and may allow the transmission of additional information. At the present time, such wormholes and associated black holes are completely theoretical, but scientists believe that it is not completely impossible for them to be created or manipulated by any advanced civilization.

We’re trying to find generalizations in our setup that can transfer more information, but that’s still in the works, “Van Leuven told Live Science.But there will always be a limit. There will be no infinite amount of information you can send without destroying the wormhole. The study was published online on July 29 in the Preprint Journal arXiv and submitted to the Journal of High Energy Physics.

Source@livescience.com