Physicists are ready to put the multiverse theory to the test using pencil and paper calculations. Via arstechnica
whose mission is to enhance public understanding of science by covering research developments and trends in mathematics and the physical and life sciences.why our bubble looks so special
“It’s a long shot,” said Jonathan Braden, a cosmologist at the University of Toronto who is involved in the effort, but, he said, it’s a search for evidence “for something you thought you could never test.” In the cosmological context, space can get similarly stuck in a false vacuum state. A speck of false vacuum will occasionally relax into true vacuum , and this true vacuum will balloon outward as a swelling bubble, feasting on the false vacuum’s excess energy, in a process called false vacuum decay. It’s this process that may have started our cosmos with a bang.
One group recently coaxed vacuum bubble-like behavior out of a simple simulation. The researchers, including, a prominent theoretical physicist at the California Institute of Technology, started with “the [most] baby version of this problem that you can think of,” as co-author Ashley Milsted put it: a line of about 1,000 digital arrows that could point up or down.
That device is known as a quantum annealer. A limited quantum computer, it specializes in solving optimization problems by letting qubits seek out the lowest-energy configuration available—a process not unlike false vacuum decay. If all goes well, they’ll answer two questions: the rate at which bubbles form, and how the inflation of one bubble changes the odds that another bubble will inflate nearby. These queries can’t even be formulated with current mathematics, said Braden, who contributed to the theoretical groundwork for the experiment.
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