entanglement

Quantum entanglement is the binding together of two particles or objects, even though they may be far apart – their respective properties are linked in a way that's not possible under the rules of classical physics.It's a weird phenomenon that Einstein described as "spooky action at a distance", but its weirdness is what makes it so fascinating to scientists. In a 2021 study, quantum entanglement was directly observed and recorded at the macroscopic scale – a scale much bigger than the subatomic particles normally…

Scientists, including Albert Einstein and Erwin Schrödinger, first discovered the phenomenon of entanglement in the 1930s. In 1972, John Clauser and Stuart Freedman were the first to prove experimentally that two widely separated particles can be entangled.A Q&A with Caltech alumnus John Clauser on his first experimental proof of quantum entanglement.When scientists, including Albert Einstein and Erwin Schrödinger, first discovered the phenomenon of entanglement in the 1930s, they were perplexed. Disturbingly,…

The 2022 Nobel Prize in Physics has been awarded to three scientists for their work in pioneering quantum information science. Alain Aspect, John F. Clauser and Anton Zeilinger all conducted some of the first experiments with entangled photons, enabling a future for commercial quantum computers.The spooky world of quantum physics predicts a few unexpected quirks, including quantum entanglement. This state allows two particles to become so entwined with each other that changes made to one will instantly affect the other,…

Alain Aspect, John F. Clauser and Anton Zeilinger won the 2022 Nobel Prize in Physics for their work using entangled photons to test the quantum foundations of reality Credit: vanbeets/Getty Images (medal)Advertisement This year’s Nobel Prize in Physics was awarded in equal parts to Alain Aspect of the University of Paris-Saclay, John F. Clauser of J.F. Clauser & Associates, and Anton Zeilinger of the University of Vienna, for their pathfinding work in quantum mechanics and quantum information science. Working…

A material’s spins, depicted as red spheres, are probed by scattered neutrons. Applying an entanglement witness causes the neutrons to form a kind of quantum gauge capable of distinguishing between classical and quantum spin fluctuations. Credit: Image courtesy of Nathan Armistead, Oak Ridge National LaboratoryBecause of quantum physics, quantum materials behave in surprising ways. For instance, they can be superconductors, which can allow electricity to flow with no resistance. These exceptional materials could lead to…

Physicists at the Max Planck Institute have developed an efficient new method to drive the quantum entanglement of photons, and demonstrated it by entangling a record number of photons. The technique could be a boon for quantum computers.Quantum entanglement is a phenomenon that sounds like it should be impossible. Essentially, particles can become so intertwined that they can no longer be described individually, and changing a specific property of one particle will instantly cause a change in its entangled partner, no…

As quantum computing makes technological strides that will allow for its general adoption, many ancillary areas of research need to be explored for it to be usable in the real world. Researchers in China have now managed to entangle two quantum memories (devices that can store information on quantum states for retrieval at a later time) across the greatest distance ever recorded - 12.5 Km. The step brings the concept of a quantum internet closer to fruition: one that allows decentralized communication between quantum…

Researchers in Germany have demonstrated quantum entanglement of two atoms separated by 33 km (20.5 miles) of fiber optics. This is a record distance for this kind of communication and marks a breakthrough towards a fast and secure quantum internet.Quantum entanglement is the uncanny phenomenon where two particles can become so inextricably linked that examining one can tell you about the state of the other. Stranger still, changing something about one particle will instantly alter its partner, no matter how far apart…