Researchers have discovered that entanglement, a quantum phenomenon where particles share a connection beyond distance, disappears entirely above a specific temperature. Previous observations hinted at this 'sudden death' of entanglement, but the new finding provides a mathematically rigorous explanation.
Nearly a century ago, the physicist Erwin Schrödinger called attention to a quirk of the quantum world that has fascinated and vexed researchers ever since. When quantum particles such as atoms interact, they shed their individual identities in favor of a collective state that’s greater, and weirder, than the sum of its parts. This phenomenon is called entanglement. Researchers have a firm understanding of how entanglement works in idealized systems containing just a few particles.
But like ambitious upstarts everywhere, they viewed their relative naïveté as an advantage, a way to see a problem with fresh eyes. “One of our strengths is that we don’t know much quantum,” Moitra said. “The only quantum we know is the quantum that Ewin taught us.” The team decided to focus on relatively high temperatures, where researchers suspected that fast quantum algorithms would exist, even though nobody had been able to prove it.
Entanglement Quantum Mechanics Thermodynamics Temperature Superconductivity
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