Wormholes are something that could send travelers across galaxies without having to worry about 1,000-year trips or cosmic roadblocks. Predicted by general relativity, such objects are still just theoretical—unless you’re a magnet.

In 2015, a trio of scientists at the Universitat Autònoma de Barcelona built a device that functions as a kind of wormhole for magnetic fields. If the device is put inside an applied magnetic field, it is magnetically undetectable. And if another magnetic field travels through the wormhole, it appears to leave space altogether, only showing up at either end.

This magnetic wormhole won’t teleport anything to another star system, but it could offer a path to building magnetic resonance imaging (MRI) machines that don’t involve putting patients in a claustrophobic tube.

According to theory, a wormhole wrinkles the fabric of space-time so that two distant places become connected, and traveling through the tunnel takes no time at all. Wormholes aren't absolutely forbidden by physics, as they show up in certain solutions of Einstein's relativity equations, but there is a lively debate among physicists about whether they are possible in our universe. At the same time, previous studies showed that it might be possible to build a simplified wormhole in the lab that would allow electromagnetic waves to travel through an invisible tunnel.

To make their model wormhole, physics professor Alvaro Sanchez and his team started with a 3.2-inch sphere of copper, yttrium, oxygen, and carbon–a common alloy for commercial superconductors. They surrounded it with a layer of plastic and covered that with another thin layer of ferromagnetic material.

"We surrounded it with a carefully designed 'metasurface' to cancel the field," says Sanchez.

The layered sphere had a hole in it, and through that, the researchers put a rolled-up metal tube that was also magnetized—effectively, a skinny dipole magnet. The team turned on a magnetic field and put the whole apparatus inside, using liquid nitrogen to cool the sphere and maintain the superconductivity of the metal alloy.

Ordinarily, the magnetic field lines surrounding a magnetized superconductor will bend and become distorted—not unlike the distortion of space-time caused by intense gravity. That didn't happen. Instead, the surrounding magnetic field simply passed right by the sphere as though nothing was there.

Video Editor: Yash/Team 121 Creators ([ Ссылка ])
Presenter: Sidhart Viyapu ([ Ссылка ])
Project Head: Rajkumar Shukla
Production: World Of Science Media ([ Ссылка ])

©2023, World Of Science (WOS) Media. All Rights Reserved

-~-~~-~~~-~~-~-
Please watch: "The $1 Trillion Project Of Turning Sahara Green Again! What Could Go Wrong?" - [ Ссылка ]
-~-~~-~~~-~~-~-

свернуть