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Let’s start with the title. No, scientists haven’t created a wormhole using a quantum computer. They haven’t even simulated one. They simulated some aspects of wormhole dynamics under the crucial assumption that the holographic correspondence of the Sachdev–Ye–Kitaev model holds. Without this assumption they just have a bunch of qubits being entangled, no relation to wormholes.Mehr Kontext gibt es bei diesem Link in den Kommentaren dort.
Update: I tried reading the paper in some more detail. Almost all the calculations in the paper were done on paper or on a classical computer. As far as I can tell, all they did was perform elaborate SYK calculations on a classical computer, together with simulations of noise on the Google quantum computer, trying to find a possible calculation on the quantum computer that would have signal, not just noise. Once such an N=7 SYK calculation was identified, they used a 9 qubit quantum computer and the noisy result matched the simulation result from the classical computer, exactly as expected. Seeing the completely expected match between results from a 9 bit noisy quantum computer and the results of the simulation of this on a classical computer caused Maria Spiropulu to say that “I was shaken” and “It was nuts. It was nuts”, while Joe Lykken felt that the moment was on a par with discovery of the Higgs particle.*gacker*