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  • News

    Designer diamonds could one day help build a quantum internet

    A new kind of artificial diamond is a cut above the rest for quantum memory.

    Unlike other synthetic diamonds, which could either store quantum information for a long time or transmit it clearly, the new diamond can do both. This designer crystal, described in the July 6 Science, could be a key building block in a quantum internet. Such a futuristic communications network would allow...

    07/06/2018 - 11:43 Materials, Quantum Physics, Technology
  • News

    Mini machines can evade friction by taking quantum shortcuts

    SANTA BARBARA, Calif. — To evade friction, try taking a quantum shortcut.

    Two teams of physicists are building tiny machines designed to operate with the maximum possible efficiency. According to thermodynamics, there’s an ultimate limit to the efficiency of machines known as heat engines — including steam engines and car engines — which convert heat into motion or other types of energy...

    06/29/2018 - 15:21 Quantum Physics
  • News

    A tiny version of this physics toy is revealing quantum secrets

    SANTA BARBARA, Calif. — A simple toy is helping scientists understand new details of a mysterious quantum process.

    The rhythmic click-clacking of the metal balls in Newton’s cradle has long entertained physics students. Now, scientists have re-created the toy on an atomic scale, using it to probe how quantum systems reach a balanced state known as thermal equilibrium.

    Leave a mug...

    06/28/2018 - 11:03 Quantum Physics
  • Science Ticker

    Split atom clouds get entangled in quantum tests

    Clouds of linked-up atoms are doing the splits.

    Scientists forged quantum connections between separate regions within clouds of ultracold atoms, demonstrating entanglement between thousands of particles in two different locations. Previous similar experiments had entangled several thousand atoms, but only within one entire cloud (SN Online: 3/25/15).

    Now researchers have split up a...

    04/26/2018 - 14:00 Quantum Physics
  • News

    Spooky quantum entanglement goes big in new experiments

    Quantum entanglement has left the realm of the utterly minuscule, and crossed over to the just plain small. Two teams of researchers report that they have generated ethereal quantum linkages, or entanglement, between pairs of jiggling objects visible with a magnifying glass or even the naked eye — if you have keen vision.

    Physicist Mika Sillanpää and colleagues entangled the motion of...

    04/25/2018 - 13:00 Quantum Physics
  • News

    Superconductors may shed light on the black hole information paradox

    LOS ANGELES ­— Insights into a black hole paradox may come from a down-to-Earth source.

    Superconductors, materials through which electrons can move freely without resistance, may share some of the physics of black holes, physicist Sreenath Kizhakkumpurath Manikandan of the University of Rochester in New York reported March 7 at a meeting of the American Physical Society. The analogy...

    03/09/2018 - 16:12 Quantum Physics
  • News in Brief

    Google moves toward quantum supremacy with 72-qubit computer

    LOS ANGELES — Quantum computers are bulking up.

    Researchers from Google are testing a quantum computer with 72 quantum bits, or qubits, scientists reported March 5 at a meeting of the American Physical Society — a big step up from the company’s previous nine-qubit chip.

    The team hopes to use the larger quantum chip to demonstrate quantum supremacy for the first time, performing a...

    03/05/2018 - 17:17 Quantum Physics
  • News

    Two-way communication is possible with a single quantum particle

    Communication is a two-way street. Thanks to quantum mechanics, that adage applies even if you’ve got only one particle to transmit messages with.

    Using a single photon, or particle of light, two people can simultaneously send information to one another, scientists report in a new pair of papers. The feat relies on a quirk of quantum mechanics — superposition, the phenomenon through...

    02/23/2018 - 10:00 Quantum Physics
  • News

    Quantum computers go silicon

    For quantum computers, silicon’s springtime may finally have arrived.

    Silicon-based technology is a late bloomer in the quantum computing world, lagging behind other methods. Now for the first time, scientists have performed simple algorithms on a silicon-based quantum computer, physicist Lieven Vandersypen and colleagues report online February 14 in Nature.  

    The computer has just...

    02/14/2018 - 13:00 Quantum Physics
  • Year in Review

    A quantum communications satellite proved its potential in 2017

    During the world’s first telephone call in 1876, Alexander Graham Bell summoned his assistant from the other room, stating simply, “Mr. Watson, come here. I want to see you.” In 2017, scientists testing another newfangled type of communication were a bit more eloquent. “It is such a privilege and thrill to witness this historical moment with you all,” said Chunli Bai, president of the...

    12/13/2017 - 08:28 Quantum Physics