Quantum Physics

Quantum Physics News -- ScienceDaily News on quantum physics. Read current research on everything from quantum mechanics to quantum dots. Was Albert Einstein right?

  • Atomic imperfections move quantum communication network closer to reality
    on June 23, 2017 at 7:55 pm

    An international team of scientists has discovered how to manipulate a weird quantum interface between light and matter in silicon carbide along wavelengths used in telecommunications. […]

  • Quantum thermometer or optical refrigerator?
    on June 22, 2017 at 6:30 pm

    In an arranged marriage of optics and mechanics, physicists have created microscopic structural beams that have a variety of powerful uses when light strikes them. […]

  • Holey pattern boosts coherence of nanomechanical membrane vibrations
    on June 22, 2017 at 2:38 pm

    Researchers have introduced a new type of nanomechanical resonator, in which a pattern of holes localizes vibrations to a small region in a 30 nm thick membrane. The pattern dramatically suppresses coupling to random fluctuations in the environment, boosting the vibrations' coherence. The researchers' quantitative understanding and numerical models provide a versatile blueprint for ultracoherent nanomechanical devices. Among others, this enables a new generation of nanomechanical sensors to probe quantum limits of mechanical measurements, and more sensitive force microscopy. […]

  • Shaking Schrödinger's cat
    on June 16, 2017 at 12:34 pm

    Frequent measurement of a quantum system's state can either speed or delay its collapse, effects called the quantum Zeno and quantum anti-Zeno effect. But so too can "quasimeasurements" that only poke the system and garner no information about its state. […]

  • Interplay of light and matter: A 'perfect' attosecond experiment
    on June 15, 2017 at 7:50 pm

    Novel experiments using ultrafast pulses are currently revolutionizing laser physics research. They deliver unprecedented insights into matter – into the structure and dynamics of electrons in atoms, molecules and in condensed phases. Using what is known as an attosecond experiment, physicists have managed to completely measure and describe the quantum-mechanical wave function of an ionized electron. […]

  • Ring, Ring: 'Earth? It's space calling, on the quantum line'
    on June 15, 2017 at 6:27 pm

    Scientists report the successful transmission of entangled photons between suborbital space and Earth. […]

  • Shortcut to satellite-based quantum encryption network
    on June 15, 2017 at 4:05 pm

    Researchers demonstrate ground-based measurements of quantum states sent by a laser aboard a satellite 38,000 kilometers above Earth. […]

  • Superconducting nanowire memory cell, miniaturized technology
    on June 13, 2017 at 8:33 pm

    Researchers have developed a new nanoscale memory cell that holds tremendous promise for successful integration with superconducting processors. The new technology provides stable memory at a smaller size than other proposed memory devices. […]

  • Surprise just beneath the surface in carbon dioxide experiment
    on June 12, 2017 at 7:35 pm

    When a carbon dioxide experiment didn't match with what theorists predicted, researchers went back to the drawing board and discovered something new. […]

  • Quantum theory for manipulating nanomagnets
    on June 12, 2017 at 1:42 pm

    A new theory that predicts the properties of nanomagnets manipulated with electric currents has now been revealed by experts. This theory is useful for future quantum technologies. […]

  • Physicists use numerical 'tweezers' to study nuclear interactions
    on June 9, 2017 at 2:40 pm

    Researchers have developed numerical 'tweezers' that can pin a nucleus in place, enabling them to study how interactions between protons and neutrons produce forces between nuclei. […]

  • Simulations pinpoint atomic-level defects in solar cell nanostructures
    on June 9, 2017 at 1:12 pm

    Heterogeneous nanostructured materials are widely used in various optoelectronic devices, including solar cells. However, the nano-interfaces contain structural defects that can affect performance. Calculations have helped researchers ID the root cause of the defects in two materials and provide design rules to avoid them. […]

  • Quantum nanoscope: Seeing electrons surfing the waves of light on graphene
    on June 8, 2017 at 6:56 pm

    Researchers have studied how light can be used to 'see' the quantum nature of an electronic material. They managed to do that by capturing light in a net of carbon atoms and slowing down light it down so that it moves almost as slow as the electrons in the graphene. […]

  • Neutrons zero in on elusive magnetic Majorana fermion
    on June 8, 2017 at 6:56 pm

    Neutron scattering has revealed in unprecedented detail new insights into the exotic magnetic behavior of a material that could pave the way for quantum calculations far beyond the limits of a computer's binary code. A research team has confirmed magnetic signatures likely related to Majorana fermions--elusive particles that could be the basis for a quantum bit, or qubit, in a two-dimensional graphene-like material, alpha-ruthenium trichloride. […]

  • Not so elementary: Physicists review three experiments that hint at a phenomenon beyond the...
    on June 8, 2017 at 5:33 pm

    Scientists reviewed three experiments that hint at a phenomenon beyond the Standard Model of particle physics, outlines a new report. […]

  • Optical communication using solitons on a photonic chip
    on June 8, 2017 at 4:36 pm

    Researchers have used optical silicon nitride micro-resonators on a photonic chip that can easily be integrated into compact communication systems. Their demonstration allows a transmission of data rate of 55 terabits per second over a distance of 75 kilometers. […]

  • How to reduce shockwaves in quantum beam experiments
    on June 7, 2017 at 4:39 pm

    While skimmers have been a necessary component in atomic and molecular-beam experiments for decades, they were also known to impose a fundamental limit on the number of particles one could pack into the beam. However, researchers have now revealed a simple way to overcome this limit. […]

  • Quasiparticles that could lead to faster circuits, higher bandwidths, imaged
    on June 7, 2017 at 4:39 pm

    The first images of half-light, half-matter quasiparticles called exciton-polaritons have been captured by scientists. The discovery could be an early step to developing nanophotonic circuits that are up to 1 million times faster than current electrical circuits. […]

  • New confirmation of Einstein's General Theory of Relativity
    on June 7, 2017 at 4:38 pm

    Albert Einstein predicted that whenever light from a distant star passes by a closer object, gravity acts as a kind of magnifying lens, brightening and bending distant starlight. Yet, Einstein added, 'There is no hope of observing this phenomenon directly.' Now, researchers have done just that, saying that the discovery opens a new window to understanding 'the history and evolution of galaxies such as our own.' […]

  • Viability of quantum satellite communications
    on June 6, 2017 at 4:15 pm

    Researchers have taken a significant step towards enabling secure quantum communication via moving satellites, as announced by the Canadian Government in April 2017. Their study demonstrates the first quantum key distribution transmissions from a ground transmitter to a quantum payload on a moving aircraft. […]

  • Neutrino discovery: A step closer to finding CP violation
    on June 6, 2017 at 1:50 pm

    The different rates of neutrino and anti-neutrino oscillations recorded by an international collaboration of researchers is an important step in the search for a new source of asymmetry in the laws that govern matter and antimatter. […]

  • Seeing the invisible with a graphene-CMOS integrated device
    on June 5, 2017 at 7:03 pm

    Researchers integrate graphene and quantum dots with CMOS technology to create an array of photodetectors, producing a high resolution image sensor. […]

  • A stream of superfluid light
    on June 5, 2017 at 4:13 pm

    Scientists have known for centuries that light is composed of waves. The fact that light can also behave as a liquid, rippling and spiraling around obstacles like the current of a river, is a much more recent finding that is still a subject of active research. […]

  • 'Quantum leap' toward building a novel experiment to probe the 'dark contents' of the vacuum
    on June 5, 2017 at 1:22 pm

    Physicists have made a huge step forwards towards building a novel experiment to probe the 'dark contents' of the vacuum. What we see, normal matter and light, only accounts for a about 5 percent of the universe. Understanding the remaining 95 percent (the dark content) remains of the greatest challenges for fundamental physics in the 21st Century. […]

  • Physicist builds on Einstein and Galileo's work
    on June 2, 2017 at 3:28 pm

    Sixteenth century scientist Galileo Galilei threw two spheres of different mass from the top of the Leaning Tower of Pisa to establish a scientific principle. Now nearly four centuries later, a team of physicists has applied the same principle to quantum objects. […]

  • Knowledge by simplification: Scientists explore strong force
    on June 2, 2017 at 12:50 pm

    The “strong force” plays a crucial role for the existence of matter in the visible universe, scientists report. They used a method of theoretical simplification which might be applicable to heavier nuclei. […]

  • New model deepens understanding of the dynamics of quark-gluon plasmas
    on June 1, 2017 at 11:27 pm

    New theoretical approaches have been presented by researchers to explain and predict high-energy nuclear collisions experiments. Computer simulations performed enabled the researchers to make predictions to test, validate or correct the model. […]

  • Entangle, swap, purify, repeat: Enhancing connections between distant nodes
    on June 1, 2017 at 7:19 pm

    Scientists have developed a protocol that enhances quantum entanglement, confirming its effectiveness across a distance of two meters. […]

  • Breaking Newton's Law
    on June 1, 2017 at 7:17 pm

    In the quantum world, our intuition for moving objects is strongly challenged and may sometimes even completely fail. Experimental physicists have now found a quantum particle which shows an intriguing oscillatory back-and-forth motion in a one-dimensional atomic gas. […]

  • Muon magnet's moment has arrived
    on June 1, 2017 at 5:56 pm

    On May 31, the 50-foot-wide superconducting electromagnet at the center of the Muon g-2 experiment at Fermilab saw its first beam of muon particles from Fermilab's accelerators, kicking off a three-year effort to measure just what happens to those particles when placed in a stunningly precise magnetic field. The answer could rewrite scientists' picture of the universe and how it works. […]