entanglement – Quanta Magazine

Computer Scientists Prove That Heat Destroys Quantum Entanglement

Ben Brubaker — Wed, 28 Aug 2024 14:09:05 +0000

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...

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What Is Quantum Teleportation?

Janna Levin — Thu, 14 Mar 2024 13:00:37 +0000

Quantum teleportation isn’t just science fiction; it’s entirely real and happening in laboratories today. But teleporting quantum particles and information is a far cry from beaming people through space. In some ways, it’s even more astonishing. John Preskill, a theoretical physicist at the California Institute of Technology, is one of the leading theoreticians of quantum computing and information.

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Physicists Observe ‘Unobservable’ Quantum Phase Transition

Charlie Wood — Mon, 11 Sep 2023 15:08:31 +0000

In 1935, Albert Einstein and Erwin Schrödinger, two of the most prominent physicists of the day, got into a dispute over the nature of reality. Einstein had done the math and knew that the universe must be local, meaning that no event in one location could instantly affect a distant location. But Schrödinger had done his own math, and he knew that at the heart of quantum mechanics lay a strange...

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Quantum Complexity Shows How to Escape Hawking’s Black Hole Paradox

Charlie Wood — Wed, 02 Aug 2023 14:51:35 +0000

Inside of a black hole, the two theoretical pillars of 20th-century physics appear to clash. Now a group of young physicists think they have resolved the conflict by appealing to the central pillar of the new century — the physics of quantum information.

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In New Paradox, Black Holes Appear to Evade Heat Death

George Musser — Tue, 06 Jun 2023 13:56:42 +0000

Heat death held a morbid fascination for Victorian-era physicists. It was an early example of how everyday physics connects to the grandest themes in cosmology. Drop ice cubes into a glass of water, and you create a situation that is out of equilibrium. The ice melts, the liquid chills, and the system reaches a common temperature. Although motion does not cease — water molecules continue to...

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