From the «barely understand this» department:
Feed: Slashdot
Title: Qbits 30 Meters Apart Maintain Entanglement Across Refrigeration Systems Author: EditorDavid
Date: Sat, 13 May 2023 13:34:00 -0400
Link:
https://science.slashdot.org/story/23/05/13/0254215/qbits-30-meters-apart-maintain-entanglement-across-refrigeration-systems?utm_source=rss1.0mainlinkanon&utm_medium=feed
"A new experiment uses superconducting qubits to demonstrate that quantum mechanics violates what's called local realism," reports Ars Technica, "by allowing two objects to behave as a single quantum system no matter how large the separation between them." The experiment wasn't the first to show that local
realism isn't how the Universe works — it's not even the first to do so with qubits. But it's the first to separate the qubits by enough distance to ensure that light isn't fast enough to travel between them while measurements are made.
And it did so by cooling a 30-meter-long aluminum wire to just a few milliKelvin. Because the qubits are so easy to control, the experiment provides a new precision to these sorts of measurements. And the hardware setup may be essential for future quantum computing efforts... Everyone working with superconducting qubits says that we will ultimately need to integrate thousands of them into a single quantum computer. Unfortunately, each of these qubits requires a considerable amount of space on a chip, meaning it gets difficult to make chips with more than a few hundred of them. So major players like Google and IBM ultimately plan to link multiple chips into a single computer (something
the startup Rigetti is already doing). For tens of thousands of qubits, however,
we're almost certainly going to need so many chips that it gets difficult to keep them all in a single bit of cooling hardware. This means we're going to eventually want to link chips in different refrigeration systems — exactly what
was demonstrated here. So this is an important demonstration that we can, in fact, link qubits across these sorts of systems. Or, as long-time slashdot reader nounderscores puts it, "Imagine a beowulf cluster of these. "The Qbits that Simon Storz et al at ETH Zurich entangled at the ends of 30m of cryogenically chilled wire not only put the last nail into the coffin of hidden variable theory by being so far apart, they also allow quantum computing to scale to multiple refrigeration systems."
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Read more of this story[5] at Slashdot.
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[3]:
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[5]:
https://science.slashdot.org/story/23/05/13/0254215/qbits-30-meters-apart-maintain-entanglement-across-refrigeration-systems?utm_source=rss1.0moreanon&utm_medium=feed (link)
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