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E.g., 11/21/2017
E.g., 11/21/2017
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Your search has returned 2343 articles:
  • Feature

    Simulating the universe using Einstein’s theory of gravity may solve cosmic puzzles

    If the universe were a soup, it would be more of a chunky minestrone than a silky-smooth tomato bisque.

    Sprinkled with matter that clumps together due to the insatiable pull of gravity, the universe is a network of dense galaxy clusters and filaments — the hearty beans and vegetables of the cosmic stew. Meanwhile, relatively desolate pockets of the cosmos, known as voids, make up a thin...

    11/14/2017 - 15:30 Cosmology
  • Science Ticker

    Quantum computers take a step forward with a 50-qubit prototype

    Bit by qubit, scientists are edging closer to the realm where quantum computers will reign supreme.

    IBM is now testing a prototype quantum processor with 50 quantum bits, or qubits, the company announced November 10. That’s around the number needed to meet a sought-after milestone: demonstrating that quantum computers can perform specific tasks that are beyond the reach of traditional...

    11/10/2017 - 09:00 Quantum Physics, Computing
  • News

    Photons are caught behaving like superconducting electrons

    Light is a fan of the buddy system. Photons, or particles of light, have been spotted swapping energy with partners. This chummy behavior resembles how electrons pair up in materials that conduct current without resistance, known as superconductors, researchers report in a paper accepted in Physical Review Letters.

    Although the photons exchange energy like electrons do, it’s unknown...

    10/30/2017 - 15:21 Condensed Matter, Quantum Physics
  • News in Brief

    Light’s weird dual nature weathers trip to space and back

    Light is two-faced: Sometimes it behaves like a wave, sometimes like a particle. Now, scientists have shown that light’s shifty disposition persists even after trekking thousands of kilometers into space and back again, researchers report October 25 in Science Advances.

    Depending on how light is measured, it can either be particle-like, lighting up a camera pixel, for example, or...

    10/25/2017 - 14:00 Quantum Physics, Physics
  • Reviews & Previews

    New physics books don’t censor the math behind reality

    Many books about science are meant to be pleasure reading. Such books attempt to convey the wonder and fascination and excitement of science, and ideally some of the substance as well. After all, good popular science writing is not only engaging and entertaining, but also informative. But even very informative popular books are not designed to be fully educational about the science in...

    10/16/2017 - 15:00 Physics, Numbers
  • News

    Superbugs may meet their match in these nanoparticles

    Antibiotics may have a new teammate in the fight against drug-resistant infections.

    Researchers have engineered nanoparticles to produce chemicals that render bacteria more vulnerable to antibiotics. These quantum dots, described online October 4 in Science Advances, could help combat pathogens that have developed resistance to antibiotics (SN: 10/15/16, p. 11).

    “Various superbugs...

    10/09/2017 - 07:00 Technology, Biophysics
  • News

    New atomic clock is most precise yet

    A new model of atomic clock is now the world’s steadiest metronome, with a tick rate about six times more precise than the previous record-holder.

    This souped-up clock is an optical lattice — it measures time by counting the oscillations of light in a laser beam, which happen about 430 trillion times per second. Strontium atoms in the clock tick off each oscillation by absorbing and re-...

    10/05/2017 - 16:15 Technology, Physics
  • News

    Proton size still perplexes despite a new measurement

    Nonconformists could take a page from the proton’s playbook: The subatomic particle is once again resisting scientists’ attempts to size it up.

    Everyone agrees the proton is tiny: Its radius is less than a femtometer, or a trillionth of a millimeter. But scientists still don’t agree on exactly how small it is. A new measurement supports the case for a smaller proton, physicist Lothar...

    10/05/2017 - 14:00 Physics
  • Context

    Quantum mysteries dissolve if possibilities are realities

    When you think about it, it shouldn’t be surprising that there’s more than one way to explain quantum mechanics. Quantum math is notorious for incorporating multiple possibilities for the outcomes of measurements. So you shouldn’t expect physicists to stick to only one explanation for what that math means. And in fact, sometimes it seems like researchers have proposed more “interpretations” of...

    10/01/2017 - 07:00 Quantum Physics
  • News

    Quantum video chat links scientists on two different continents

    Hackers, take notice: Ultrasecure quantum video chats are now possible across the globe.

    In a demonstration of the world’s first intercontinental quantum link, scientists held a long-distance videoconference on September 29 between Austria and China. To secure the communication, a Chinese satellite distributed a quantum key, a secret string of numbers used to encrypt the video...

    09/29/2017 - 17:07 Quantum Physics