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Keyword: quantumphysics

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  • Measuring light and vacuum fluctuations from a time flow perspective

    07/10/2019 10:12:29 PM PDT · by ETL · 24 replies
    Phys.org ^ | July 10, 2019 | Ingrid Fadelli, Phys.org
    Some of the greatest unanswered questions about the nature of the universe are related to light, the vacuum (i.e. space where neither matter nor radiation exists), and their relationship with time. In the past, physicists and philosophers have addressed a variety of complex questions, for instance, what is the nature of the vacuum, and how is the propagation of light connected to the passing of time? Researchers at the University of Konstanz have recently carried out a study exploring the quantum states of light and vacuum fluctuations, as well as their interplay with time. Their paper, published in Nature Physics,...
  • Antimatter keeps with quantum theory. It’s both particle and wave

    05/09/2019 4:33:28 PM PDT · by ETL · 25 replies
    ScienceNews.org ^ | May 3, 2019 | Maria Temming
    For the first time, researchers have performed a version of the famous double-slit experiment with antimatter particles.The double-slit experiment demonstrates one of the fundamental tenets of quantum physics: that pointlike particles are also waves. In the standard version of the experiment, particles travel through a pair of slits in a solid barrier. On a screen on the other side, an interference pattern typical of waves appears. Crests and troughs emerging from each slit reinforce each other or cancel each other out as they overlap, creating alternating bands of high and low particle density on the screen.This kind of experiment has...
  • Inside Giant Atom Smasher, Physicists See the Impossible: Light Interacting with Light

    04/25/2019 9:24:13 AM PDT · by BenLurkin · 42 replies
    Lie Science ^ | April 25, 2019 07:14am ET | Paul Sutter,
    The laws of physics are such that one photon just passes by another with zero interaction. But in a new experiment inside the world's most powerful atom smasher, researchers got a glimpse of the impossible: photons bumping into each other. The answer lies in one of the most inscrutable and yet delicious aspects of modern physics, and it goes by the funky name of quantum electrodynamics. In this picture of the subatomic world, the photon isn't necessarily a photon. Well, at least, it's not always a photon. Particles like electrons and photons and all the other -ons continually flip back...
  • Something Is Not Quite Right In the Universe, Ultraprecise New Measurement Reveals

    02/09/2019 9:49:05 AM PST · by ETL · 82 replies
    Space.com ^ | February 9, 2019 | Mara Johnson-Groh, Live Science Contributor
    Something isn't quite right in the universe. At least based on everything physicists know so far. Stars, galaxies, black holes and all the other celestial objects are hurtling away from each other ever faster over time. Past measurements in our local neighborhood of the universe find that the universe is exploding outward faster than it was in the beginning. That shouldn't be the case, based on scientists' best descriptor of the universe. If their measurements of a value known as the Hubble Constant are correct, it means that the current model is missing crucial new physics, such as unaccounted-for fundamental...
  • Life on the edge in the quantum world

    02/08/2019 1:11:58 PM PST · by ETL · 26 replies
    Phys.org ^ | February 8, 2019 | Aalto University
    Quantum physics sets the laws that dominate the universe at a small scale. The ability to harness quantum phenomena could lead to machines like quantum computers, which are predicted to perform certain calculations much faster than conventional computers. One major problem with building quantum processors is that the tracking and controlling quantum systems in real time is a difficult task because quantum systems are overwhelmingly fragile: Manipulating these systems carelessly introduces significant errors in the final result. New work by a team at Aalto could lead to precise quantum computers. The researchers report controlling quantum phenomena in a custom-designed electrical...
  • Quantum Weirdness May Seem to Outrun Light — Here's Why It Can't

    09/29/2018 10:23:05 AM PDT · by ETL · 15 replies
    Space.com ^ | Sept 29, 2018 | Paul Sutter, Astrophysicist
    Entanglement is one of the most confusing aspects of quantum mechanics — a field of physics that isn't exactly known to be clear-cut, sensible, common-sense and easy-to-understand.  Even Albert Einstein himself was flummoxed by the surprising behavior of microscopic particles, and he firmly believed that we were fundamentally misunderstanding the universe with quantum mechanics. It turns out that Einstein was wrong, but it's going to take a while to explain where he went wrong and what's really going on in the quantum realm. Head of state One of the most important lessons from quantum mechanics is that we have to...
  • We’re About to Cross The ‘Quantum Supremacy’ Limit in Computing

    09/02/2017 4:48:55 PM PDT · by 2ndDivisionVet · 27 replies
    Gears of Biz ^ | September 3, 2017 | Helen Clark
    The 4th International Conference on Quantum Technologies held in Moscow last month was supposed to put the spotlight on Google, who were preparing to give a lecture on a 49-qubit quantum computer they have in the works. A morning talk presented by Harvard University’s Mikhail Lukin, however, upstaged that evening’s event with a small announcement of his own – his team of American and Russian researchers had successfully tested a 51-qubit device, setting a landmark in the race for quantum supremacy. Quantum computers are considered to be part of the next generation in revolutionary technology; devices that make use of...
  • First ever Earth-orbit teleportation completed

    07/11/2017 7:12:10 PM PDT · by Ciaphas Cain · 49 replies
    Sky News ^ | July 11, 2017
    Scientists have completed the first teleportation of an object from Earth to a satellite orbiting more than 300 miles away. Alas, those of you expecting Scotty to beam them up soon will be sorely disappointed - the object teleported was merely a single photon. While the experiment doesn't bring us any closer to teleporting matter, it is a huge leap forward for quantum physics. The team of Chinese researchers behind the successful teleportation came together from a number of disciplines and included quantum physicists as well as rocket scientists. In 2016, they launched a satellite called Micius, named after Chinese...
  • Feminist researcher invents ‘intersectional quantum physics’ to fight ‘oppression’ of Newton

    05/29/2017 10:22:06 PM PDT · by ForYourChildren · 79 replies
    The College Fix ^ | 05/30/2017 | Toni Airaksinen
    ‘Binary and absolute differences’ are ‘exploitative’ A feminist academic affiliated with the University of Arizona has invented a new theory of “intersectional quantum physics,” and told the world about it in a journal published by Duke University Press. Whitney Stark argues in support of “combining intersectionality and quantum physics” to better understand “marginalized people” and to create “safer spaces” for them, in the latest issue of The Minnesota Review. Because traditional quantum physics theory has influenced humanity’s understanding of the world, it has also helped lend credence to the ongoing regime of racism, sexism and classism that hurts minorities, Stark...
  • Experiment confirms quantum theory weirdness

    05/28/2015 6:02:31 PM PDT · by LibWhacker · 50 replies
    PhysOrg ^ | 5/27/15
    The bizarre nature of reality as laid out by quantum theory has survived another test, with scientists performing a famous experiment and proving that reality does not exist until it is measured. Physicists at The Australian National University (ANU) have conducted John Wheeler's delayed-choice thought experiment, which involves a moving object that is given the choice to act like a particle or a wave. Wheeler's experiment then asks - at which point does the object decide? Common sense says the object is either wave-like or particle-like, independent of how we measure it. But quantum physics predicts that whether you observe...
  • Quantum physics: What is really real?

    05/20/2015 9:21:49 AM PDT · by Reeses · 46 replies
    nature.com ^ | 20 May 2015 | Zeeya Merali
    Owen Maroney worries that physicists have spent the better part of a century engaging in fraud. Ever since they invented quantum theory in the early 1900s, explains Maroney, who is himself a physicist at the University of Oxford, UK, they have been talking about how strange it is — how it allows particles and atoms to move in many directions at once, for example, or to spin clockwise and anticlockwise simultaneously. But talk is not proof, says Maroney. “If we tell the public that quantum theory is weird, we better go out and test that's actually true,” he says. “Otherwise...
  • Particles accelerate without a push (But Newton's not dead)

    01/25/2015 10:48:22 PM PST · by LibWhacker · 8 replies
    MIT News Office ^ | 1/20/15 | David L. Chandler
    New analysis shows a way to self-propel subatomic particles, extend the lifetime of unstable isotopes. David L. Chandler | MIT News Office January 20, 2015 Press Inquiries Some physical principles have been considered immutable since the time of Isaac Newton: Light always travels in straight lines. No physical object can change its speed unless some outside force acts on it. Not so fast, says a new generation of physicists: While the underlying physical laws haven’t changed, new ways of “tricking” those laws to permit seemingly impossible actions have begun to appear. For example, work that began in 2007 proved that...
  • Does A Parallel Spirit World Exist

    02/05/2014 10:05:03 AM PST · by OneVike · 43 replies
    TRC Magazine Facebook Page ^ | 2/5/14 | Chuck Ness
    In today's technological age, it might seem silly for intelligent people to consider a spiritual world where beings we cannot see might exist. Oh it's fine to read books and watch Hollywood movies about the afterlife and spirits that roam the netherworld but that's all make believe, not the real world. In the real world we are taught that reality consists of what we can touch, taste, see, hear, smell, and that the spirit world is for those weak minded individuals who use religion as a crutch to get through the day. However, what if I told you that...
  • ‘Spooky action’ builds a wormhole between ‘entangled’ particles

    12/04/2013 8:21:43 AM PST · by Red Badger · 85 replies
    http://www.washington.edu ^ | December 3, 2013 | Vince Stricherz
    Quantum entanglement, a perplexing phenomenon of quantum mechanics that Albert Einstein once referred to as “spooky action at a distance,” could be even spookier than Einstein perceived. Physicists at the University of Washington and Stony Brook University in New York believe the phenomenon might be intrinsically linked with wormholes, hypothetical features of space-time that in popular science fiction can provide a much-faster-than-light shortcut from one part of the universe to another. But here’s the catch: One couldn’t actually travel, or even communicate, through these wormholes, said Andreas Karch, a UW physics professor. Quantum entanglement occurs when a pair or a...
  • Quantum physics proves that there IS an afterlife, claims scientist

    11/15/2013 9:33:44 PM PST · by Olog-hai · 96 replies
    Daily Mail (UK) ^ | 11:47 EST, 14 November 2013 | Victoria Woollaston
    Most scientists would probably say that the concept of an afterlife is either nonsense, or at the very least unprovable. Yet one expert claims he has evidence to confirm an existence beyond the grave—and it lies in quantum physics. Professor Robert Lanza claims the theory of biocentrism teaches that death as we know it is an illusion created by our consciousness. … Biocentrism is classed as the theory of everything and comes from the Greek for “life center”. It is the believe that life and biology are central to reality and that life creates the universe, not the other way...
  • Quantum Leaps May Solve Impossible Problems

    10/10/2002 11:58:04 AM PDT · by sourcery · 43 replies · 1,057+ views
    NewsFactor Network ^ | October 7, 2002 | Mike Martin
    "It is widely accepted now that, without a doubt, information is physical and quantum physics provides the rules of that physical behavior," George Mason University computer science professor Richard Gomez told NewsFactor. Alan Turing might be considered the "John Forbes Nash of computer science" -- a troubled young Princeton genius who achieved prominence in the 1950s. Turing published one of the top 10 papers in all of 20th-century science -- "On the Computability of Numbers." He killed himself over a conviction for homosexuality at the height of his genius, but since his death, his definition of "computability" has stood untouched...
  • Government Lab Reveals It Has Operated Quantum Internet for Over Two Years

    05/06/2013 6:00:49 PM PDT · by LibWhacker · 38 replies
    Government Lab Reveals It Has Operated Quantum Internet for Over Two Years A quantum internet capable of sending perfectly secure messages has been running at Los Alamos National Labs for the last two and a half years, say researchers One of the dreams for security experts is the creation of a quantum internet that allows perfectly secure communication based on the powerful laws of quantum mechanics.The basic idea here is that the act of measuring a quantum object, such as a photon, always changes it. So any attempt to eavesdrop on a quantum message cannot fail to leave telltale signs...
  • Spooky Quantum Entanglement Gets Extra 'Twist'

    11/07/2012 5:25:07 PM PST · by BenLurkin · 22 replies
    LiveScience ^ | Date: 06 November 2012 Time: 10:02 AM ET | Jesse Emspak, Contributor
    Now physicists at the University of Vienna in Austria have "virtually intertwined" or entangled two particles spinning faster than ever in opposite directions. Entanglement occurs when two particles remain connected so that actions performed on one affect the other, despite the distance between them. (Einstein referred to this eerie connection as "spooky action at a distance.") In the new study, Anton Fickler and his colleagues entangled two photons that had a high orbital angular momentum, a property that measures the twisting of a wave of light. In quantum physics, particles such as photons can behave as particles and waves. Such...
  • Researchers look beyond space and time to cope with quantum theory

    10/28/2012 8:50:13 PM PDT · by JerseyanExile · 78 replies
    Phys Org ^ | October 28, 2012
    Physicists have proposed an experiment that could force us to make a choice between extremes to describe the behaviour of the Universe. The proposal comes from an international team of researchers from Switzerland, Belgium, Spain and Singapore, and is published today in Nature Physics. It is based on what the researchers call a 'hidden influence inequality'. This exposes how quantum predictions challenge our best understanding about the nature of space and time, Einstein's theory of relativity. "We are interested in whether we can explain the funky phenomena we observe without sacrificing our sense of things happening smoothly in space and...
  • Manipulators of the Quantum Realm Reap Nobel Glory

    10/09/2012 11:43:46 AM PDT · by neverdem · 14 replies
    ScienceNOW ^ | 9 October 2012 | Adrian Cho
    Enlarge Image Light touch. Serge Haroche and David Wineland (right) won the Nobel for their work manipulating the quantum states of individual atoms. Credit: CNRS and NIST The past couple of decades have witnessed a sea change in quantum physics. Previously, scientists relied on the strange rules of quantum theory mainly to explain the odd natural behavior of masses of atoms and other quantum particles such as photons. Increasingly, however, physicists are exploiting those rules to create delicate quantum states of individual particles and to do novel things with them. This year's Nobel Prize in physics honors two experimenters...