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?

  • Nano-watch has steady hands
    on November 21, 2017 at 6:25 pm

    A new nanomechanical hand shows the time of an electronic clock, by spinning a tiny cylinder using light. A silicon nanorod, less than a thousandth of a millimetre long, can be trapped in thin air using focused laser beams, and spun to follow the ticking of a clock, losing only one-millionth of a second over four days. […]

  • Physicists design $100 handheld cosmic ray muon detector
    on November 20, 2017 at 10:45 pm

    Physicists have designed a pocket-sized cosmic ray muon detector to track these ghostly particles. The detector can be made with common electrical parts, and when turned on, it lights up and counts each time a muon passes through. The relatively simple device costs just $100 to build, making it the most affordable muon detector available today. […]

  • Quantum dots amplify light with electrical pumping
    on November 20, 2017 at 10:44 pm

    In a breakthrough development, scientists have shown that they can successfully amplify light using electrically excited films of the chemically synthesized semiconductor nanocrystals known as quantum dots. […]

  • New window into electron behavior
    on November 16, 2017 at 7:21 pm

    For the first time, physicists have developed a technique to visualize the behavior of electrons beneath a material's surface. […]

  • Finding Majoranas
    on November 16, 2017 at 7:21 pm

    Nano-'hashtags' could be the key to generating the highly sought Majorana quasiparticle, report scientists. […]

  • Hunt for dark matter is narrowed
    on November 15, 2017 at 5:46 pm

    Scientists have disproved the existence of a specific type of axion -- an important candidate 'dark matter' particle -- across a wide range of its possible masses. […]

  • Trapping and manipulating electrons with sound waves
    on November 14, 2017 at 9:31 pm

    Scientists have investigated a new way of building a cage for electrons. […]

  • Essential quantum computer component downsized by two orders of magnitude
    on November 14, 2017 at 3:48 pm

    Qubits, the key building blocks at the heart of every quantum computer, are extremely sensitive to interference and need to be shielded from unwanted signals, for example by using so-called nonreciprocal devices. But until now these devices were huge and produced unwanted magnetic fields themselves. Now, scientists have developed a new nonreciprocal device that is only a tenth of a millimeter wide, and -- maybe even more importantly -- is not magnetic. […]

  • Quantum computing with molecules for a quicker search of unsorted databases
    on November 14, 2017 at 3:42 pm

    Scrapbooks or social networks are collections of mostly unsorted data. The search for single elements in very large data volumes, i.e. for the needle in the data haystack, is extremely complex for classical computers. Scientists have now quantum mechanically implemented and successfully executed Grover's algorithm, a process for the quick finding of a search element in unsorted databases. […]

  • Molecular magnetism packs power with 'messenger electron'
    on November 14, 2017 at 12:50 am

    A UW-Madison lab has made a molecule that gains magnetic strength through an unusual way of controlling those spins, which could lead to a breakthrough in quantam computing. […]

  • The unbelievable speed of electron emission from an atom
    on November 13, 2017 at 3:47 pm

    In a unique experiment, researchers have clocked how long it takes for an electron to be emitted from an atom. The result is .00000000000000002 seconds, or 20 billionths of a billionth of a second. The researchers' stopwatch consists of extremely short laser pulses. Hopefully, the results will help to provide new insights into some of the most fundamental processes in nature. […]

  • Monopole current offers way to control magnets
    on November 13, 2017 at 2:56 pm

    Using numerical simulations, a research group showed how a magnetic field could be used to control the properties of north and south poles, which are fractionalized from magnetic moments of electrons, on a frustrated magnet called a quantum spin ice. […]

  • 'Perfectly frustrated' metal provides possible path to superconductivity
    on November 10, 2017 at 3:40 am

    The US Department of Energy's Ames Laboratory has discovered and described the existence of a unique disordered electron spin state in a metal that may provide a unique pathway to finding and studying frustrated magnets. Their unique properties are of interest in the development of quantum computing and high-temperature superconductivity. […]

  • Novel layered superconductor based on tin and arsenic
    on November 8, 2017 at 3:22 pm

    Researchers have recently discovered a novel layered superconductor containing tin (Sn) and arsenic (As) as its major components. […]

  • Need entangled atoms? Get 'Em FAST! with NIST's new patent-pending method
    on November 7, 2017 at 5:29 pm

    Physicists have come up with a way to link a group of atoms' quantum mechanical properties among themselves far more quickly than is currently possible, potentially providing a tool for highly precise sensing and quantum computer applications. […]

  • Fireworks from atoms at ultra-low temperatures
    on November 7, 2017 at 5:28 pm

    Scientists aren't normally treated to fireworks when they discover something about the universe. But a team of researchers found a show waiting for them at the atomic level -- along with a new form of quantum behavior. […]

  • Measuring atoms for better navigation and mineral detection
    on November 7, 2017 at 4:32 pm

    Better navigation systems and tracking of minerals and water may be the result of a new discovery by physicists studying atom measurement devices. […]

  • New quantum materials offer novel route to 3-D electronic devices
    on November 7, 2017 at 4:31 pm

    Researchers have shown how the principles of general relativity open the door to novel electronic applications such as a three-dimensional electron lens and electronic invisibility devices. […]

  • Tech increases microfluidic research data output 100-fold
    on November 7, 2017 at 4:31 pm

    Researchers have developed a technique that allows users to collect 100 times more spectrographic information per day from microfluidic devices, as compared to the previous industry standard. The novel technology has already led to a new discovery: the speed of mixing ingredients for quantum dots used in LEDs changes the color of light they emit -- even when all other variables are identical. […]

  • A quasiparticle quest
    on November 6, 2017 at 6:20 pm

    Physicists have developed a device that could provide conclusive evidence for the existence (or not) of non-Abelian anyons. […]

  • Quantum computing on the move
    on November 6, 2017 at 5:10 pm

    New work marks a decisive milestone for bringing the idea for scaling up quantum computers into the realm of feasibility. […]

  • Creating images of minute structures
    on November 6, 2017 at 4:22 pm

    Scientists gain an insight into the fascinating world of atoms and molecules using x-ray microscopes. Ground-breaking research by physicists has paved the way towards new imaging techniques. The team of scientists have successfully developed and tested a method which is considerably more effective than conventional procedures. […]

  • Researchers develop data bus for quantum computer
    on November 6, 2017 at 3:05 pm

    The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. […]

  • A strange new world of light
    on November 2, 2017 at 6:18 pm

    Structured beams of light, which exhibit strange behavior such as bending in a spiral, corkscrewing and dividing like a fork, not only can tell scientists a lot about the physics of light but also have a wide range of applications from super-resolution imaging to molecular manipulation and communications. Now, researchers have developed a tool to generate more complex structured light in a completely different way. […]

  • A bit of a 'quantum magic trick': Experiment shows how to speed up frequency measurement
    on November 2, 2017 at 3:00 pm

    Is there a faster way to determine a frequency? It turns out there is. […]

  • Ions in the spotlight
    on November 2, 2017 at 1:59 pm

    New scientific results have been given a special place in the Nature Photonics journal. They focus on the effective isolation of ions in optical and electrostatic traps. […]

  • One step closer to defining dark matter, GPS satellite atomic clocks on the hunt
    on November 1, 2017 at 5:03 pm

    One professor who studies the earth and one who studies space came together in the pursuit to detect and define dark matter. They are one step closer. Using 16 years of archival data from GPS satellites that that orbit the earth, the team looked for dark matter clumps in the shape of walls or bubbles and which would extend far out beyond the GPS orbits, the solar system and beyond. […]

  • Physicists describe new dark matter detection strategy
    on November 1, 2017 at 5:03 pm

    Physicists propose a dark matter detector that would use superfluid helium to explore mass ranges for dark matter particles thousands of times smaller than current large-scale experiments. […]

  • New mathematical models could help solve few-body problems in physics
    on November 1, 2017 at 4:24 pm

    In physics, the conundrum known as the 'few-body problem,' how three or more interacting particles behave, has bedeviled scientists for centuries. Equations that describe the physics of few-body systems are usually unsolvable and the methods used to find solutions are unstable. There aren't many equations that can probe the wide spectrum of possible few-particle dynamics. A new family of mathematical models for mixtures of quantum particles could help light the way. […]

  • Newest dark matter map hints at where astrophysics must go for breakthroughs
    on October 31, 2017 at 5:03 pm

    Three astrophysicists -- Scott Dodelson, Risa Wechsler and George Efstathiou -- recently participated in a roundtable discussion, hosted by The Kavli Foundation, about new data from the Dark Energy Survey and its implications for understanding the universe's history. […]