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Keyword: stringtheory

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  • Is the universe a bubble? Let's check: Making the multiverse hypothesis testable

    07/19/2014 9:37:03 AM PDT · by onedoug · 35 replies
    Science Daily ^ | 17 JUL 2014 | Johnson, et al
    Scientists are working to bring the multiverse hypothesis, which to some sounds like a fanciful tale, firmly into the realm of testable science. Never mind the Big Bang; in the beginning was the vacuum. The vacuum simmered with energy (variously called dark energy, vacuum energy, the inflation field, or the Higgs field). Like water in a pot, this high energy began to evaporate -- bubbles formed.
  • True or false? Ten myths about Isaac Newton

    07/12/2014 11:14:54 AM PDT · by SeekAndFind · 38 replies
    Oxford University Press Blog ^ | 07/12/2014 | Sarah Dry
    Nearly three hundred years since his death, Isaac Newton is as much a myth as a man. The mythical Newton abounds in contradictions; he is a semi-divine genius and a mad alchemist, a somber and solitary thinker and a passionate religious heretic. Myths usually have an element of truth to them but how many Newtonian varieties are true? Here are ten of the most common, debunked or confirmed by the evidence of his own private papers, kept hidden for centuries and now freely available online. 10. Newton was a heretic who had to keep his religious beliefs secret. True. While...
  • Missing Light Crisis: 'Something is Amiss in the Universe'

    07/10/2014 6:57:55 AM PDT · by shove_it · 40 replies
    IBTimes ^ | 10 Jul 2014 | Hannah Osborne
    There is a "missing light crisis" taking place in the universe with a huge deficit on what there should be and what there actually is, astronomers have said. In a statement, experts from the Carnegie Institution for Science said "something is amiss in the universe" with 80% of the light missing. Lead author of the study Juna Kollmeier said: "It's as if you're in a big, brightly-lit room, but you look around and see only a few 40-watt lightbulbs. Where is all that light coming from? It's missing from our census." Published in Astrophysical Journal Letters, scientists found that the...
  • Could time travel soon become a reality? Physicists simulate sending quantum light particles

    06/23/2014 10:54:00 AM PDT · by Red Badger · 92 replies ^ | 23 June 2014 | By Jonathan O'Callaghan
    University of Queensland researchers say photons can move through time A simulation of two wormhole-travelling photons found they could interact This suggests, at the smallest scales, jumping through time is possible The experiment could solve some famous theories that 'prevent' time travel But whether this will be possible on a larger scale remains to be seen If a time traveller went back in time and stopped their own grandparents from meeting, would they prevent their own birth? That’s the crux of an infamous theory known as the 'grandfather paradox', which is often said to mean time travel is impossible -...
  • Was Einstein wrong all along? Controversial theory suggests the speed of light is SLOWER...

    06/28/2014 12:14:35 PM PDT · by BenLurkin · 73 replies ^ | : 06:57 EST, 27 June 2014 | Ellie Zolfagharifard
    The University of Maryland physicist believes the delay could have been because the light was in fact slowed as it travelled due to something known as 'vacuum polarisation'. During this phenomenon, photons break down to something known as ‘positrons’ and electrons for a split second. before combining together again. When they split, quantum mechanics creates a gravitational potential between the pair of ‘virtual’ particles. Dr Franson argues that the process might have a gradual impact on the speed of the photon, meaning that over 168,000 light years, the photons may have suffered a near five-hour delay. If the physicist is...
  • Scientists achieve reliable quantum teleportation for first time

    05/29/2014 5:34:05 PM PDT · by SeekAndFind · 75 replies
    C/NET ^ | 05/29/2014 | Nick Statt
    Albert Einstein once told a friend that quantum mechanics doesn't hold water in his scientific world view because "physics should represent a reality in time and space, free from spooky actions at a distance." That spooky action at a distance is entanglement, a quantum phenomenon in which two particles, separated by any amount of distance, can instantaneously affect one another as if part of a unified system. Now, scientists have successfully hijacked that quantum weirdness -- doing so reliably for the first time -- to produce what many sci-fi fans have long dreamt up: teleportation. No, not beaming humans aboard...
  • Quantum Particles Penetrate 5 Barriers

    06/15/2014 9:18:11 PM PDT · by BenLurkin · 10 replies ^ | 8 hours ago | Will Phoenix 
    Up to this point, the tunneling process only involved one particle tunneling through a single barrier. Hanns-Christoph Nägerl and a team of researchers at the Institute for Experimental Physics of the University of Innsbruck, in Innsbruck, Austria recently learned of a process for quantum particles to pass through as many as five different barriers simultaneously via an effect called Bose enhancement. They created what they call “a physical quantum simulator” that can imitate other quantum systems. They cooled cesium atoms to almost absolute zero or -459.67 degrees F. They next put the atoms in an essential optical lattice created with...
  • Supermassive Black Hole Shows Strange Gas Movements

    06/20/2014 9:25:59 PM PDT · by BenLurkin · 23 replies ^ | June 20, 2014 | Elizabeth Howell on
    Sometimes it takes a second look — or even more — at an astronomical object to understand what’s going on. This is what happened after astronomers obtained this image of NGC 5548 using the Hubble Space Telescope in 2013. While crunching the data, they saw some gas moving around the galaxy in a way that they did not understand. From the supermassive black hole embedded in the galaxy’s heart, the researchers detected gas moving outward quite quickly — blocking about 90% of the X-rays being emitted from the black hole, a common feature of objects of this type. So, astronomers...
  • Update on Podkletnov gravity modification work and rumors

    06/18/2014 1:36:15 AM PDT · by Renfield · 18 replies
    Next Big Future ^ | 5-14-2014 | Brian Wang
    American Antigravity interviewed Eugene Podkletnov to discuss recent (2004 to 2013) experimental antigravity research in gravity modification and superconductors. For nearly two decades Dr. Podkletnov has been researching the link between gravitation and high-temperature superconductors, and just recently published the peer-review results of new experiments he’s conducted to measure the speed of a force-beam projected by a stationary superconducting apparatus he’s developed. Podkletnov is well-known for his experiments involving YBCO superconductors, which produced a gravity-shielding effect that was investigated by NASA and has been the subject of many peer-review papers. He describes continuing his experiments in this area, and indicates...
  • Quantum Entanglement And Faster Than Light Data Transmission

    06/02/2014 10:43:11 AM PDT · by Ernest_at_the_Beach · 36 replies ^ | Mon, Jun 02, 2014 - 7:51 AM | Benjamin Young
    Over the past week there has been quite a buzz in the scientific community over a Dutch experiment reliably transmitting data instantly between two electrons via quantum entanglement. While many reports are sensationalizing the discovery, referring to it as a breakthrough in ‘teleportation’, there’s something almost as exciting as physical transportation already proven possible in the experiment: instant communication! While scientists have reached a 3-meter(or 10-foot) range with a 100% success rate, worldwide implementation would revolutionize communication. Instant text messages, infinitely scalable internet bandwidth, and sub-millisecond(or even sub-measurable) latency. Even now, our fastest long-distance communication efforts are too slow to...
  • ‘No evidence for or against gravitational waves’: Big Bang 'ripples' too weak to be significant.

    06/02/2014 10:34:39 AM PDT · by SeekAndFind · 64 replies
    NATURE ^ | 06/02/2014 | RON COWEN
    The astronomers who this spring announced that they had evidence of primordial gravitational waves jumped the gun because they did not take into proper account a confounding effect of galactic dust, two new analyses suggest. Although further observations may yet find the signal to emerge from the noise, independent experts now say they no longer believe that the original data constituted significant evidence. Researchers said in March that they had found a faint twisting pattern in the polarization of the cosmic microwave background (CMB), the Big Bang’s afterglow, using a South Pole-based radio telescope called BICEP2. This pattern, they said,...
  • Scientists discover how to turn light into matter after 80-year quest

    05/19/2014 3:08:29 AM PDT · by markomalley · 24 replies
    Physics ^ | 5/18/2014
    Imperial College London physicists have discovered how to create matter from light - a feat thought impossible when the idea was first theorised 80 years ago. In just one day over several cups of coffee in a tiny office in Imperial's Blackett Physics Laboratory, three physicists worked out a relatively simple way to physically prove a theory first devised by scientists Breit and Wheeler in 1934.Breit and Wheeler suggested that it should be possible to turn light into matter by smashing together only two particles of light (photons), to create an electron and a positron – the simplest method of...
  • Northern Lights' Physics Could Aid in Nuclear Fusion

    05/07/2014 3:25:00 PM PDT · by BenLurkin · 24 replies
    Live Science ^ | May 06, 2014 10:25am ET | Katia Moskvitch,
    The aurora is more than just a breathtaking display of light. It may also hold the secret of a magnetic phenomenon related to the nuclear fusion powering the sun. This secret could even help create nuclear fusion in the lab, says a team of researchers. Nuclear fusion is a reaction that combines the nuclei of two atoms into one. The process powers stars, but getting a self-sustained fusion reaction going on Earth is very difficult, and has so far eluded scientists. For example, in February, researchers at the Lawrence Livermore Laboratory in California made headlines when they managed to spur...
  • Earth Is Safe: No Black Holes Spun Out of Atom Smasher, Yet

    05/01/2014 7:37:16 AM PDT · by BenLurkin · 23 replies
    Live Science ^ | April 30, 2014 09:52am ET | Charles Q. Choi
    The most powerful particle accelerator in the world, the Large Hadron Collider, has not yet created any black holes as some have feared, researchers say. Even if this atom smasher does create black holes, there is no danger of those black holes destroying Earth, added scientists of the new study published online March 5 in the journal Physical Review Letters.
  • Proving uncertainty: First rigorous formulation supporting Heisenberg's famous 1927 principle

    04/29/2014 10:27:28 AM PDT · by Red Badger · 27 replies
    Phys.Org ^ | 04-29-2014 | Provided by American Institute of Physics
    Nearly 90 years after Werner Heisenberg pioneered his uncertainty principle, a group of researchers from three countries has provided substantial new insight into this fundamental tenet of quantum physics with the first rigorous formulation supporting the uncertainty principle as Heisenberg envisioned it. In the Journal of Mathematical Physics, the researchers reports a new way of defining measurement errors that is applicable in the quantum domain and enables a precise characterization of the fundamental limits of the information accessible in quantum experiments. Quantum mechanics requires that we devise approximate joint measurements because the theory itself prohibits simultaneous ideal measurements of position...
  • XMM-Newton Discovers Unique Pair Of Hidden Black Holes

    04/24/2014 12:34:27 PM PDT · by Ernest_at_the_Beach · 18 replies ^ | April 22, 2014 | Source: ESA
    21 Image Caption: Artist's impression of a binary supermassive black hole system. Credit: ESA - C. Carreau ESAA pair of supermassive black holes in orbit around one another have been spotted by XMM-Newton. This is the first time such a pair have been seen in an ordinary galaxy. They were discovered because they ripped apart a star when the space observatory happened to be looking in their direction.Most massive galaxies in the Universe are thought to harbor at least one supermassive black hole at their center. Two supermassive black holes are the smoking gun that the galaxy has merged...
  • Graphene made in a kitchen blender

    04/23/2014 1:53:19 PM PDT · by neverdem · 16 replies
    Chemistry World ^ | 22 April 2014 | Tim Wogan
    Shear mixing could be used to produce graphene flakes in bulk © CRANN Suspensions of high quality graphene can be produced quickly and cheaply using a common industrial mixer, researchers in Ireland have discovered.1 The scientists even managed to produce small amounts of graphene using a kitchen blender.While next generation electronic devices need ultra-pure, monolayer graphene produced by mechanical exfoliation or chemical vapour deposition, everyday electronics such as batteries and solar cells are produced using solution coating. Therefore, to use graphene in these kinds of electronics engineers require huge amounts of high quality graphene flakes suspended in solution.In 2008, Jonathan...
  • Majority of Americans doubt the Big Bang Theory

    04/21/2014 1:08:36 PM PDT · by SeekAndFind · 76 replies
    UPI ^ | 04/21/2014 | Brooks Hays
    In a new national poll on America's scientific acumen, more than half of respondents said they were "not too confident" or "not at all confident" that "the universe began 13.8 billion years ago with a big bang." The poll was conducted by GfK Public Affairs & Corporate Communications. Scientists were apparently dismayed by this news, which arrives only a few weeks after astrophysicists located the first hard evidence of cosmic inflation. But when compared to results from other science knowledge surveys, 51 percent isn't too shameful -- or surprising. Other polls on America's scientific beliefs have arrived at similar findings....

    07/09/2004 12:20:53 PM PDT · by PatrickHenry · 93 replies · 1,660+ views
    Boston University ^ | 08 July 2004 | News release staff
    A team of nearly 100 physicists from around the world have achieved results verifying that the elementary particle known as the neutrino exhibits a distinctive pattern of oscillation. This discovery shows that it is likely that the Standard Model, proposed in the 1970s to describe the fundamental forces and particles that make up all matter, is incomplete. The findings provide the needed confirmation to their previous discovery of neutrino oscillation and give the most precise measurement yet of neutrino mass. “These findings show that the Standard Model needs to be modified to better explain the fundamental forces that make up...
  • Mini Black Holes Might Reveal 5th Dimension

    06/26/2006 8:22:41 PM PDT · by NormsRevenge · 26 replies · 962+ views ^ | 6/25/06 | Ker Than
    A space telescope scheduled for launch in 2007 will be sensitive enough to detect theoretical miniature black holes lurking within our solar system, scientists say. By doing so, it could test an exotic five-dimensional theory of gravity that competes with Albert Einstein's General Theory of Relativity. That is, of course, if the tiny black holes actually exist. The idea, recently detailed online in the journal Physical Review D, is being proposed by Charles Keeton, a physicist at Rutgers University in New Jersey, and Arlie Petters of Duke University in North Carolina. Branes The Randall-Sundrum braneworld model, named after the scientists...
  • Can You Escape the Force of Gravity? [What is gravity?]

    04/07/2014 9:17:43 AM PDT · by BenLurkin · 70 replies
    universetoday ^ | April 7, 2014 | Fraser Cain on
    There’s no end to it. Gravity appears to be madly greedy and long armed. Members of the Virgo Super cluster are connected to each other, and they’re dozens of millions of light-years apart. Objects in the Pisces-Cetus Super cluster complex are even connected to each other by our invisible and obnoxiously possessive friend. And they are hundreds of millions of light years apart… In fact, you’re so popular that you are gravitationally pulled towards even most distant object in the observable Universe. And they, in turn, are linked to you. As a result, without the outward expansion and acceleration of...
  • 'Smoking Gun' Evidence of Inflation?

    03/26/2014 5:59:56 PM PDT · by lasereye · 2 replies
    ICR ^ | March, 2014 | Jake Hebert, Ph.D.*
    On March 17, a team of radio astronomers announced they discovered purportedly direct evidence for cosmic inflation—a critical component of the modern Big Bang model. To make this discovery, the researchers used a specialized telescope called BICEP2 located on the Antarctic plateau.1 Radiation that has its strongest intensity in the microwave portion of the electromagnetic spectrum comes to us from all directions in space. Secular researchers interpret this cosmic microwave background radiation (CMB) as "relic radiation" from a time about 400,000 years after the alleged cosmic explosion. Now, a team of astronomers led by John M. Kovac of the Harvard-Smithsonian...
  • Waiter, There's a Black Hole in My Condensed Matter...

    03/25/2014 7:21:28 AM PDT · by SunkenCiv · 20 replies
    Perimeter Institute ^ | Monday, March 24, 2014 | unattributed
    Physicists are using surprising ideas and mathematical tools originating in string theory to guide research into strange materials that are cropping up in condensed matter laboratories... “Let’s start here,” Sachdev says. “Condensed matter physicists study the behaviour of electrons in many materials – semiconductors, metals, and exotic materials like superconductors.” Normally, these physicists can model the behaviour of a material as if electrons were moving freely around inside it. Even if that’s not what’s actually happening, because of complex interactions, it makes the model easy to understand and the calculations easier to do. Electrons (and occasionally other particles) used in...
  • Astronomy Picture of the Day -- The View Near a Black Hole

    03/23/2014 4:38:43 AM PDT · by SunkenCiv · 17 replies
    NASA ^ | March 23, 2014 | (see photo credit)
    Explanation: In the center of a swirling whirlpool of hot gas is likely a beast that has never been seen directly: a black hole. Studies of the bright light emitted by the swirling gas frequently indicate not only that a black hole is present, but also likely attributes. The gas surrounding GRO J1655-40, for example, has been found to display an unusual flickering at a rate of 450 times a second. Given a previous mass estimate for the central object of seven times the mass of our Sun, the rate of the fast flickering can be explained by a black...
  • Direct Evidence Of Cosmic Inflation

    03/19/2014 10:05:07 AM PDT · by Allen In Texas Hill Country · 25 replies
    "The first evidence for the primordial B-mode polarization of the cosmic microwave background (CMB) has been detected by astronomers working on the Background Imaging of Cosmic Extragalactic Polarization (BICEP2) telescope at the South Pole.".........
  • Breaking Through Conventional Scientific Paradigm

    07/16/2006 4:45:40 PM PDT · by walford · 76 replies · 2,530+ views
    The Epoch Times ^ | July 3, 2006 | Nataly Teplitsky, Ph.D.
      "Whoever undertakes to set himself up as a judge in the field of truth and knowledge is shipwrecked by the laughter of the Gods." —Albert Einstein  The general, historical dialogue between religion and science goes back a long way—at least to Plato, Aristotle, and Leibniz. Before the 17th century, the goals of science were wisdom, understanding the natural order, and living in harmony with it. Ever since the "quantum revolution" of about 70 years ago, various scientists have been finding the intriguing parallels between their results and certain mystical-transcendental religions. Heisenberg, Bohr, Schroedinger, Eddington, Einstein—all held a mystical, spiritual...
  • Our world may be a giant hologram

    01/18/2009 4:47:55 PM PST · by Crimson Elephant · 54 replies · 2,350+ views
    New Scientist ^ | January 15th, 2009 | Marcus Chown
    DRIVING through the countryside south of Hanover, it would be easy to miss the GEO600 experiment. From the outside, it doesn't look much: in the corner of a field stands an assortment of boxy temporary buildings, from which two long trenches emerge, at a right angle to each other, covered with corrugated iron. Underneath the metal sheets, however, lies a detector that stretches for 600 metres. For the past seven years, this German set-up has been looking for gravitational waves - ripples in space-time thrown off by super-dense astronomical objects such as neutron stars and black holes. GEO600 has not...
  • Fermilab will measure smallest details of space time and test if the universe is a hologram in 2011

    10/26/2010 7:41:26 AM PDT · by Arec Barrwin · 52 replies
    Next Big Future ^ | October 27, 2010 | Next Big Future
    If you "lived inside" a hologram, you could tell by measuring the blurring. Fermilab is building a interferometer to test space time for holographic blurring. Possible consequence of holography Hypothesis: observable correlations are encoded on light sheets and limited by information capacity of a Planck wavelength carrier (“Planck information flux” limit) Predicts uncertainty in position at Planck diffraction scale
  • Are we living in a HOLOGRAM? Physicists believe our universe just a projection of another cosmos

    12/16/2013 3:47:30 AM PST · by NYer · 74 replies
    Daily Mail ^ | December 12, 2013 | ELLIE ZOLFAGHARIFARD
    The universe is a hologram and everything you can see - including this article and the device you are reading it on - is a mere projection. This is according to a controversial model proposed in 1997 by theoretical physicist Juan Maldacena.Until now the bizarre theory had never been tested, but recent mathematical models suggest that the mind-boggling principle could be true.Professor Maldacena's model suggests that the universe exists in nine dimensions of space and one of time.Now Japanese researchers have attempted to tackle this problem by providing mathematical evidence that the holographic principle might be correct, according to a...
  • Evidence of young universe's growth spurt is discovered

    03/18/2014 1:56:49 AM PDT · by blueplum · 21 replies
    Los Angeles Times ^ | March 17, 2014 11:56pm | Amina Khan
    Researchers focusing on gravitational waves find the first direct evidence for the theory of cosmic inflation, a faster-than-light expansion just after the big bang. Scientists staring at the faint afterglow from the universe's birth 13.8 billion years ago have discovered the first direct evidence for the theory of cosmic inflation — the mysterious and violent expansion after the big bang. The findings, made using radio telescopes at the South Pole, support the idea that our known cosmos make up just a tiny fragment in a much larger, unknown frontier that extends far beyond the reaches of light. During this period...
  • Astronomy Picture of the Day -- Cosmic Microwave Map Swirls Indicate Inflation

    03/18/2014 4:40:52 AM PDT · by SunkenCiv · 5 replies
    NASA ^ | March 18, 2014 | (see photo credit)
    Explanation: Did the universe undergo an early epoch of extremely rapid expansion? Such an inflationary epoch has been postulated to explain several puzzling cosmic attributes such as why our universe looks similar in opposite directions. Yesterday, results were released showing an expected signal of unexpected strength, bolstering a prediction of inflation that specific patterns of polarization should exist in cosmic microwave background radiation -- light emitted 13.8 billion years ago as the universe first became transparent. Called B-mode polarizations, these early swirling patterns can be directly attributed to squeeze and stretch effects that gravitational radiation has on photon-emitting electrons. The...
  • Detection of Waves in Space Buttresses Landmark Theory of Big Bang

    03/17/2014 8:46:48 AM PDT · by Seizethecarp · 80 replies
    New York Times ^ | March 17, 2014 | DENNIS OVERBYE
    On Monday, Dr. Guth’s starship came in. Radio astronomers reported that they had seen the beginning of the Big Bang, and that his hypothesis, known undramatically as inflation, looked right. Reaching back across 13.8 billion years to the first sliver of cosmic time with telescopes at the South Pole, a team of astronomers led by John M. Kovac of the Harvard-Smithsonian Center for Astrophysics detected ripples in the fabric of space-time — so-called gravitational waves — the signature of a universe being wrenched violently apart when it was roughly a trillionth of a trillionth of a trillionth of a second...
  • Closing the 'free will' loophole: Using distant quasars to test Bell's theorem

    02/26/2014 9:08:05 AM PST · by onedoug · 94 replies
    Science Daily ^ | 20 Feb 2014 | MIT Team
    Astronomers propose an experiment that may close the last major loophole of Bell's inequality -- a 50-year-old theorem that, if violated by experiments, would mean that our universe is based not on the textbook laws of classical physics, but on the less-tangible probabilities of quantum mechanics. Such a quantum view would allow for seemingly counterintuitive phenomena such as entanglement, in which the measurement of one particle instantly affects another, even if those entangled particles are at opposite ends of the universe. Among other things, entanglement -- a quantum feature Albert Einstein skeptically referred to as "spooky action at a distance"...
  • The First Test That Proves General Theory of Relativity Wrong

    02/20/2014 3:47:32 PM PST · by Kevmo · 290 replies ^ | March 24th, 2006, 12:39 GMT · | By Vlad Tarko According to Einstein's theory of general relativity, a moving mass should create another field, called gravitomagnetic field, besides its static gravitational field. This field has now been measured for the first time and to the scientists' astonishment, it proved to be no less than one hundred million trillion times larger than Einstein's General Relativity predicts. According to Einstein's theory of general relativity, a moving mass should create another field, called gravitomagnetic field, besides its static gravitational field. This field has now been measured for the first time and to the scientists' astonishment, it proved to be no less than...
  • Astrophysicists duo propose Planck star as core of black holes

    02/17/2014 10:49:25 AM PST · by SunkenCiv · 21 replies
    Phys dot org ^ | February 14, 2014 | Bob Yirka
    The current thinking regarding black holes is that they have two very simple parts, an event horizon and a singularity. Because a probe cannot be sent inside a black hole to see what is truly going on, researchers have to rely on theories. The singularity theory suffers from what has come to be known as the "information paradox"—black holes appear to destroy information, which would seem to violate the rules of general relativity, because they follow rules of quantum mechanics instead. This paradox has left deep thinking physicists such as Stephen Hawking uneasy—so much so that he and others have...
  • Barf! Subtle Distortion in Universe's Oldest Light: Swirls in Remnants of Big Bang

    01/05/2014 8:22:25 AM PST · by GodAndCountryFirst · 93 replies
    Science Daily ^ | Dec. 13, 2013
    South Pole Telescope scientists have detected for the first time a subtle distortion in the oldest light in the universe, which may help reveal secrets about the earliest moments in the universe's formation. The scientists observed twisting patterns in the polarization of the cosmic microwave background -- light that last interacted with matter very early in the history of the universe, less than 400,000 years after the big bang. These patterns, known as "B modes," are caused by gravitational lensing, a phenomenon that occurs when the trajectory of light is bent by massive objects, much like a lens focuses light.
  • 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...
  • Scientists create never-before-seen form of matter (light sabers, anyone?)

    09/25/2013 3:40:05 PM PDT · by LibWhacker · 42 replies ^ | 9/25/13
    Scientists create never-before-seen form of matter Photons with strong mutual attraction in a quantum nonlinear medium. Harvard and MIT scientists are challenging the conventional wisdom about light, and they didn't need to go to a galaxy far, far away to do it. Working with colleagues at the Harvard-MIT Center for Ultracold Atoms, a group led by Harvard Professor of Physics Mikhail Lukin and MIT Professor of Physics Vladan Vuletic have managed to coax photons into binding together to form molecules – a state of matter that, until recently, had been purely theoretical. The work is described in a September 25...
  • Research team challenges the limits of famous quantum principle

    02/08/2014 4:04:33 PM PST · by SunkenCiv · 9 replies
    Phys dot org ^ | February 05, 2014 | University of Queensland
    Almost a century ago, renowned quantum theorist Werner Heisenberg found fundamental limits on how well a quantum system can be prepared and measured, known as Heisenberg's uncertainty principle. However, only the limit that pertains to the preparation of quantum systems has been quantified; the other two, relating to measurements, have long been a matter of debate, lacking a formal treatment. These limits are: That it is impossible to jointly measure incompatible quantities, for instance, location and speed of a quantum object, with perfect accuracy; and that a measurement of one of these quantities necessarily disturbs the other. Last year, UQ's...
  • The Mystery of the North Star: Astronomers baffled to find Polaris is getting BRIGHTER

    02/06/2014 12:11:57 AM PST · by ApplegateRanch · 77 replies
    Daily Mail ^ | UPDATED: 16:18 EST, 5 February 2014 | MARK PRIGG
    Team found that Polaris is 2.5 times brighter today than in 137CE Experts say find is 'entirely unexpected' Astronomers have discovered that Polaris, the north star, is getting brighter. They say the star has suddenly reversed two decades of dimming. It is expanding at more than 100 times the rate they expected - and nobody is sure why. A team led by Scott Engle of Villanova University in Pennsylvania recalibrated historic measurements of Polaris by Ptolemy in 137 C.E., the Persian astronomer Al-Sufi in 964 C.E., and others. They investigated the fluctuations of the star over the course of several...
  • Why Hawking is Wrong About Black Holes

    02/01/2014 1:03:35 PM PST · by BenLurkin · 56 replies ^ | February 1, 2014 | Brian Koberlein on
    Black holes can radiate in a way that agrees with thermodynamics, and the region near the event horizon doesn’t have a firewall, just as general relativity requires. So Hawking’s proposal is a solution to a problem that doesn’t exist.
  • Time Travel Impossible,Say Scientists(So Forget The Stakeouts in Early 1960's Kenya)

    01/29/2014 11:10:03 AM PST · by lbryce · 115 replies
    Discovery News ^ | July 24, 2011 | Staff
    By proving a single photon can't travel faster than light, scientists say they have proven time travel is impossible. THE GIST Hong Kong physicists say they have proven a single photon cannot travel faster than the speed of light. This demonstrates that time travel is impossible, they say. Hong Kong physicists say they have proved that a single photon obeys Einstein's theory that nothing can travel faster than the speed of light — demonstrating that outside science fiction, time travel is impossible. The Hong Kong University of Science and Technology research team led by Du Shengwang said they had...
  • Weird Black Hole's Incredible Brightness Perplexes Scientists

    01/25/2014 8:25:23 AM PST · by Ernest_at_the_Beach · 23 replies ^ | November 27, 2013 01:00pm ET | By Mike Wall, Senior Writer
    A black-hole system in a neighboring galaxy is twice as bright as astronomers had thought possible, a new study reports. The incredible luminosity of the system in question, which resides about 22 million light-years from Earth in the Pinwheel Galaxy, may force a rethink of the theories that explain how some black holes radiate energy, researchers said.
  • Black holes 'do not exist'

    03/31/2005 4:41:46 PM PST · by Michael_Michaelangelo · 84 replies · 3,300+ views
    Nature ^ | 03/31/05 | Philip Ball
    Black holes are staples of science fiction and many think astronomers have observed them indirectly. But according to a physicist at the Lawrence Livermore National Laboratory in California, these awesome breaches in space-time do not and indeed cannot exist. Over the past few years, observations of the motions of galaxies have shown that some 70% the Universe seems to be composed of a strange 'dark energy' that is driving the Universe's accelerating expansion. George Chapline thinks that the collapse of the massive stars, which was long believed to generate black holes, actually leads to the formation of stars that contain...
  • Stephen Hawking stuns physicists by declaring ‘there are no black holes’—says there are GREY ones

    01/25/2014 12:03:14 AM PST · by Olog-hai · 35 replies
    Daily Mail (UK) ^ | 15:59 EST, 24 January 2014 | Mark Prigg
    Stephen Hawking has shocked physicists by admitting “there are no black holes”. In a paper published online, Professor Hawking instead argues there are “grey holes”. “The absence of event horizons means that there are no black holes—in the sense of regimes from which light can't escape to infinity,” he says in the paper, called Information Preservation and Weather Forecasting For Black Holes.He says that the idea of an event horizon, from which light cannot escape, is flawed. He suggests that instead light rays attempting to rush away from the black hole’s core will be held as though stuck on a...
  • Researchers Discover Natural 3D Counterpart to Graphene.

    01/23/2014 9:50:30 AM PST · by Ernest_at_the_Beach · 21 replies
    Xbitlabs ^ | 01/21/2014 11:50 PM | Anton Shilov
    A collaboration of researchers at the U.S department of energy (DOE)’s Lawrence Berkeley national laboratory (Berkeley Lab) has discovered that sodium bismuthide can exist as a form of quantum matter called a three-dimensional topological Dirac semi-metal (3DTDS). This is the first experimental confirmation of 3D Dirac fermions in the interior or bulk of a material, a novel state that was only recently proposed by theorists.
  • Physicists scoop information from Schrodinger's cat box [Quantum Mechanics]

    01/22/2014 2:53:50 PM PST · by ETL · 86 replies
    Christian Science Monitor ^ | January 21, 2014 | Eoin O'Carroll
    In a paper published in the current issue of the scientific journal Nature Communications and titled "Direct measurement of a 27-dimensional orbital-angular-momentum state vector," a team of physicists led by the University of Rochester's Mehul Malik describe how they circumvented a basic principle of uncertainty that requires that some states of a quantum system must be understood poorly if other states are to be understood well. Determining a quantum state, such as the position of an electron or the momentum of a photon, is tricky, to say the least. That's because subatomic particles behave nothing at all like billiard balls,...
  • 2. The Golden Ratio & Fibonacci Numbers: Fact versus Fiction- VIDEO

    01/15/2014 10:37:27 PM PST · by restornu · 16 replies
    Stanford Continuing Studies Program ^ | Dec 11, 2012 | Professor Keith Devlin
    2. The Golden Ratio & Fibonacci Numbers: Fact versus Fiction VIDEO (October 8, 2012) Professor Keith Devlin dives into the topics of the golden ratio and fibonacci numbers. Originally presented in the Stanford Continuing Studies Program
  • A cosmic feast! Milky Way’s mysterious black hole set to gobble up giant gas cloud

    01/14/2014 5:41:54 AM PST · by C19fan · 29 replies
    UK Daily Mail ^ | January 14, 2014 | Ellie Zolfaghasifard
    The Milky Way’s black hole is about to gobble up its first dinner, and astronomers are hoping to have front row seats when it happens. A huge gas cloud, about three times the mass of Earth, is on course to collide with the supermassive black hole at the heart of our galaxy in March. Astronomers expect the gas cloud will swing so close to the black hole that it will heat up to the point where it produces spectacular X-rays.
  • 'There's no Asian way of looking at physics', says Perth teacher Marko Vojkovic (Australia)

    01/10/2014 10:24:25 PM PST · by Dundee · 25 replies
    The Australian ^ | JANUARY 11, 2014 | PAIGE TAYLOR AND MARK COULTAN
    FOR many years, Perth chemistry and physics teacher Marko Vojkovic has been at the front of the fight against what he describes as sociology in the teaching of sciences. He led opposition to Western Australia's ill-fated outcomes-based education curriculum in 2007 and says he recognised some of its telltale signs when teachers got their first glimpses of the national curriculum in 2010. For example, the edict that sustainability, the Asian century and indigenous perspective should be taught as part of physics and chemistry did not sit well with Mr Vojkovic. "I don't think there's a particularly Asian way of looking...