An unusual teleportation experiment is just ordinary quantum physics, but was inspired by tunnels through an exotic ‘toy universe’.
Physicists have used a quantum computer to perform a new kind of quantum teleportation, the ability of quantum states to be transported between distant places, as though information could travel instantly. Although teleportation is an established technique in quantum technology, the purpose of the latest experiment was to simulate the behaviour of a passage called a ‘wormhole’ through a virtual universe.
“The surprise is not that the message made it across in some form, but that it made it across unscrambled,” write the authors of an Although physicists do not yet know how to write quantum theories of gravity for emergent universes directly, they know that such phenomena should be fully encapsulated in the physics of the shadow world. This means that gravitational phenomena such as black holes — which still pose riddles to theoretical physicists — or wormholes must be compatible with quantum theory.
In the latest study, Jafferis and colleagues simulated an even more stripped-down version of such a hologram using the quantum bits, or qubits, of Google’s Sycamore processor. They expected their simulated quantum particles to reproduce some behaviours of gravity in the virtual universe — but they were limited by the capabilities of today’s quantum computers.
France Dernières Nouvelles, France Actualités
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