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To create a wormhole that does not collapse, you want unique matter



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IN YOU go and out you pop – in a galaxy far, far-off. Such is the unbelievable promise of the wormhole, a hypothetical portal during which space-time funnels right into a slim passage solely to open up someplace else, presumably on the opposite facet of the universe.

It sounds fantastical, however 50 years in the past many mentioned the identical about black holes, which additionally contain extremely warped space-time. “We study wormholes partly for fun and partly, more seriously, to see what is physically allowable for space-time,” says theorist Toby Wiseman at Imperial School London. “And of course – who knows – perhaps one day, in the very far future, this could be an actual technology.”

Regardless of their mythic popularity, there may be nothing particularly outlandish about wormholes. They’re predictions of Albert Einstein’s normal concept of relativity, which says that mass creates gravity by warping the material of the universe. Normal relativity has allowed for an ever-enlarging universe, the large bang and black holes. In that context, wormholes appear no extra far-fetched. In truth, Einstein himself was one of many first to offer a mathematical description of them, within the mid-Nineteen Thirties.

“The great thing about general relativity is that you can write down any space-time you want, plug it into the Einstein equations and translate it into what matter you would need to support it,” says Wiseman. So if you would like space-time to appear like a wormhole, you want a sure type of matter.

What type? The trick is to search out one thing that may prop open a wormhole with out it collapsing immediately. In 2020, Juan Maldacena on the Institute for Superior Research (IAS) …

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