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Tag Archives: Quantum

Light from ancient quasars helps confirm quantum entanglement

Last year, physicists at MIT, the University of Vienna, and elsewhere provided strong support for quantum entanglement, the seemingly far-out idea that two particles, no matter how distant from each other in space and time, can be inextricably linked, in a way that defies the rules of classical physics. Take, ...

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Loopholes and the ‘Anti-Realism’ of the Quantum World

The theoretical physicist John Wheeler once used the phrase “great smoky dragon” to describe a particle of light going from a source to a photon counter. “The mouth of the dragon is sharp, where it bites the counter. The tail of the dragon is sharp, where the photon starts,” Wheeler ...

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The Quest to Make Super-cold Quantum Blobs in Space

On a frigid day last January in northern Sweden, a German-led team of physicists loaded a curious machine onto an unmanned rocket. The payload, about as tall as a single-story apartment, was essentially a custom-made freezer—a vacuum chamber, with a small chip and lasers within, that could cool single atoms ...

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Toy-inspired experiment on behavior of quantum systems

With its suspended metallic spheres that clack back and forth, Newton’s cradle is more than a popular desktop plaything. It has taught a generation of students about conservation of momentum and energy. It is also the inspiration for an experiment Benjamin Lev, associate professor of physics and of applied physics ...

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The Era of Quantum Computing Is Here. Outlook: Cloudy

After decades of heavy slog with no promise of success, quantum computing is suddenly buzzing with almost feverish excitement and activity. Nearly two years ago, IBM made a quantum computer available to the world: the 5-quantum-bit (qubit) resource they now call (a little awkwardly) the IBM Q experience. That seemed ...

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New type of quantum material

U.S. and European physicists searching for an explanation for high-temperature superconductivity were surprised when their theoretical model pointed to the existence of a never-before-seen material in a different realm of physics: topological quantum materials. In a new study due this week in the Early Edition of the Proceedings of the ...

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Physicists Want to Rebuild Quantum Theory From Scratch

Scientists have been using quantum theory for almost a century now, but embarrassingly they still don’t know what it means. An informal poll taken at a 2011 conference on Quantum Physics and the Nature of Reality showed that there’s still no consensus on what quantum theory says about reality—the participants ...

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