Curiosity. Step inside the Large Hadron Collider (360 video) - BBC News. Physicists Test the Response Time of Electrons. Attosecond flashes of visible light make it possible to measure the delay with which electrons react to the exciting light because of their inertia. The characteristic form of the light wave arises because the researchers at the Max Planck Institute of Quantum Optics form the pulse from light of different wavelengths.
Researchers from the Laboratory for Attosecond Physics generated for the first time visible flashes of light in attosecond dimensions. They dispatched the light-flashes to electrons in krypton atoms. Through the experiment the researchers have been able to display that the electrons, which are stimulated by the flashes, needed roughly 100 attoseconds to respond to the incident light. Until now it was assumed that particles respond to incident light without delay. Light could be the driving force which makes electronics even faster in the future. An electron weighs almost nothing at all. Visible attosecond pulses are formed from light of different wavelengths Publication: M. The Experiment That Will Allow Humans to “See” Quantum Entanglement.
Entanglement is the strange phenomenon in which two quantum particles become so deeply linked that they share the same existence. When this happens, a measurement on one particle immediately influences the other, regardless of the distance between them. Entanglement has puzzled physicists for the best part of a century. At first, its very existence was disputed. But today, physicists create entangled particles in huge numbers in labs all over the world.
They routinely use entanglement to send perfectly encrypted messages, to study quantum computation, and to better understand the nature of this profound phenomenon. The ease with which particles such as photons can be entangled has led some physicists to ask an interesting additional question: will humans ever be able to “see” entanglement? Today we get an answer thanks to the work of Valentina Caprara Vivoli at the University of Geneva in Switzerland a few pals. The main problem is that the eye cannot detect single photons. Quite! Physicists Test Classic Paradox 'Maxwell's Demon' with Beams of Light. In 1867, renowned physicist James Clerk Maxwell wrote a letter to fellow physicist and middle-name enthusiast Peter Guthrie Tait in which he outlined a thought experiment that seemed to allow for the violation of the second law of thermodynamics. The thought experiment has become known as Maxwell’s demon and it has been widely studied in the 140 odd years since its proposal.
Most of these studies have been theoretical, although a handful of experiments have actually managed to realize Maxwell’s thought experiment in a lab. Recently, a team of physicists from Oxford became the first to create a photonic Maxwell’s Demon. The results of their experiments, published in a recent issue of the Physical Review of Letters, details how the team was able to use measurements on two beams of light to create an energy imbalance between these two beams, thereby allowing work to be extracted from the system which can then be put to practical uses such as charging a battery. How We Entered a New Era of Astronomy. Last week, a new era of astronomy began as Laser Interferometer Gravitational-Wave Observatory executive director David Reitze stood before a packed room at the National Press Club in Washington, DC, uttering the words we’ve been waiting a century to hear: “We’ve detected gravitational waves.” Applause erupted from the room and all across the globe as universities, individuals, and institutions were watching via a live feed.
LIGO is a $1 billion international collaboration with nearly 1,000 scientists working together, hoping to catch a glimpse of the enigmatic cosmic phenomenon known as gravitational waves. 100 years ago, Einstein first predicted the existence of gravitational waves as part of his theory of general relativity, which says that space and time are not two separate entities, but part of a dynamic, interwoven fabric called space-time. "The information carried on the gravitational wave is exactly the same as when the system sent it out; and that is unusual in astronomy. Gravitational Waves vs. Gravity Waves: Know the Difference! So it looks like we'll be talking a lot about gravitational waves over the coming days, but why can't they be called "gravity waves?
" In this social media world where brevity is key, it may seem that chopping "gravitational" to "gravity" is no big deal — it saves a whole six characters for an even more concise tweet! MORE: Gravitational Wave Rumors: Colliding Black Holes? Though you'll likely see many news headlines heralding the wonders of "gravity wave science," do not fall into the trap! While both have gravity in common, gravity waves and gravitational waves are two very different beasts. Read on to find out why and then show off your gravitational smarts to your friends the next time you're down the pub. This image shows a computer simulation of the gravitational waves generated by 2 closely-orbiting black holes.Credit: NASA Gravitational Waves are, in their most basic sense, ripples in spacetime.
ANALYSIS: Advanced LIGO Resumes Quest for Gravitational Waves. It's True: Physicists Announce Discovery Of Gravitational Waves. Science confirms that gravitational waves exist. Gravitational Waves Explained. Scientists to make gravitational wave announcement 100 yrs after Einstein's theory of relativity. US scientists will make a presentation about the search for gravitational waves – and will possibly announce their discovery. Astronomers have been searching for decades, as they are one of the most important variables in Einstein's theory of relativity. The presentation – which coincides with the 100th anniversary of the publication of Einstein's theory of relativity – will take place at Montana State University in Bozeman, Montana, on Thursday. It will be conducted by Neil Cornish, a professor in the Department of Physics and co-director of the MSU eXtreme Gravity Institute. “Cornish will provide a status report on the effort to detect gravitational waves – or ripples in the fabric of spacetime – using the Laser Interferometer Gravitational-wave Observatory (LIGO),” the university wrote in a press release.
LIGO is a system of two detectors constructed to spot tiny vibrations from passing gravitational waves. Read more. Have Einstein's gravitational waves finally been found? Albert Einstein in Princeton, 1954 "My earlier rumour about LIGO has been confirmed by independent sources. Stay tuned! Gravitational waves may have been discovered! Exciting," said a message on Twitter from Arizona State University cosmologist Lawrence Krauss, who does not work with LIGO. His words sparked a firestorm of speculation. An announcement will be made Thursday at 10:30am (1530 GMT) at the National Press Club in the US capital, Washington.
The event brings "together scientists from Caltech, MIT and the LIGO Scientific Collaboration to update the scientific community on efforts to detect them," a National Science Foundation statement read. • Ten groundbreaking university research projects They will provide "a status report on the effort to detect gravitational waves – or ripples in the fabric of space-time – using the Laser Interferometer Gravitational-wave Observatory (LIGO)," it said. • Quiz: Can you spot the fake Albert Einstein quotes? Gravitational Waves vs. Gravity Waves: Know the Difference! So it looks like we’ll be talking a lot about gravitational waves over the coming days, but why can’t they be called “gravity waves”? In this social media world where brevity is key, it may seem that chopping “gravitational” to “gravity” is no big deal — it saves a whole six characters for an even more concise tweet! MORE: Gravitational Wave Rumors: Colliding Black Holes?
Though you’ll likely see many news headlines heralding the wonders of “gravity wave science”, do not fall into the trap! While both have gravity in common, gravity waves and gravitational waves are two very different beasts. Read on to find out why and then show off your gravitational smarts to your friends the next time you’re down the pub. Gravitational Waves are, in their most basic sense, ripples in spacetime. ANALYSIS: Advanced LIGO Resumes Quest for Gravitational Waves So far, gravitational waves are theoretical, even though strong indirect evidence for their existence is known. Forbes Welcome. Science on Flipboard. M.curiosity. High-capacity battery cathode prelithiation to offset initial lithium loss : Nature Energy.
Scientists struggle to stay grounded after possible gravitational wave signal | Science. Not for the first time, the world of physics is abuzz with rumours that gravitational waves have been detected by scientists in the US. Lawrence Krauss, a cosmologist at Arizona State university, tweeted that he had received independent confirmation of a rumour that has been in circulation for months, adding: “Gravitational waves may have been discovered!!”
The excitement centres on a longstanding experiment known as the Advanced Laser Interferometer Gravitational-Wave Observatory (Ligo) which uses detectors in Hanford, Washington, and Livingston, Louisiana to look for ripples in the fabric of spacetime. According to the rumours, scientists on the team are in the process of writing up a paper that describes a gravitational wave signal. If such a signal exists and is verified, it would confirm one of the most dramatic predictions of Albert Einstein’s century-old theory of general relativity. Speaking about the LIGO team, Krauss said: “They will be extremely cautious. Einstein's first lecture in Britain | Science. Professor Albert Einstein, of Berlin, delivered yesterday afternoon the Adamson lecture in the University of Manchester.
This was his first lecture in this country. Sir Henry Miers, the Vice Chancellor, was in the chair. The subject of Professor Einstein's lecture was the theory of "Relativity. " It was perhaps as a tribute to the intellectual independence of Manchester that Professor Einstein assumed, to all appearance, that the audience he was facing had its doubts about Relativity. Dr. The whole development of physics had been founded upon the acceptance of these axioms, but already the "special" theory of Relativity -- the original hypothesis from which Dr. The "general" theory of Relativity which had gradually been evolved, as Dr. High Tech | Gadget Lab. The Stanley’s bio-pharma operation is just one example of the ways science and tech are transforming every aspect of the industry—from growing to harvesting to packaging to retailing to consuming—as this black (and gray) market emerges into the sunlight of legitimate commerce.
Start with indoor farms, which are massively energy-intensive. Their high-pressure sodium lights, which themselves require large amounts of electricity, can send temperatures soaring. Yet marijuana plants need to stay cool and dry. Traditionally, growers have handled this dilemma by using electricity-gulping HVAC compressors. Ready to make a purchase? Earlier this year, Bollich bought the company that makes the water-cooling tech. While Bollich is cooling down indoor farms, others are working to prevent them from heating up to begin with.
In an attempt to answer that, the San Francisco Patient and Resource Center’s (SPARC) marijuana nursery is running A/B tests with LED lights from a company called LumiGrow. Einstein Podolsky Rosen Argument and the Bell Inequalities. In 1935, Einstein, Podolsky, and Rosen (EPR) published an important paper in which they claimed that the whole formalism of quantum mechanics together with what they called a “Reality Criterion” imply that quantum mechanics cannot be complete. That is, there must exist some elements of reality that are not described by quantum mechanics. They concluded that there must be a more complete description of physical reality involving some hidden variables that can characterize the state of affairs in the world in more detail than the quantum mechanical state. This conclusion leads to paradoxical results. As Bell proved in 1964, under some further but quite plausible assumptions, this conclusion that there are hidden variables implies that, in some spin-correlation experiments, the measured quantum mechanical probabilities should satisfy particular inequalities (Bell-type inequalities).
The paradox consists in the fact that quantum probabilities do not satisfy these inequalities. 1. A. B. C. A theoretical computer scientist has presented an algorithm that is being hailed as a breakthrough in mapping the obscure terrain of complexity theory, which explores how hard computational problems are to solve. Last month, László Babai, of the University of Chicago, announced that he had come up with a new algorithm for the “graph isomorphism” problem, one of the most tantalizing mysteries in computer science.
The new algorithm appears to be vastly more efficient than the previous best algorithm, which had held the record for more than 30 years. His paper became available today on the scientific preprint site arxiv.org, and he has also submitted it to the Association for Computing Machinery’s 48th Symposium on Theory of Computing. For decades, the graph isomorphism problem has held a special status within complexity theory. Babai’s announcement has electrified the theoretical computer science community. Jeremy Kun In recent weeks, Babai gave four talks outlining his algorithm. Einstein’s Parable of Quantum Insanity. “Insanity is doing the same thing over and over and expecting different results.” That witticism — I’ll call it “Einstein Insanity” — is usually attributed to Albert Einstein.
Though the Matthew effect may be operating here, it is undeniably the sort of clever, memorable one-liner that Einstein often tossed off. And I’m happy to give him the credit, because doing so takes us in interesting directions. First of all, note that what Einstein describes as insanity is, according to quantum theory, the way the world actually works. In quantum mechanics you can do the same thing many times and get different results. Indeed, that is the premise underlying great high-energy particle colliders. In those colliders, physicists bash together the same particles in precisely the same way, trillions upon trillions of times. QuantizedA monthly column in which top researchers explore the process of discovery. With that triumph in mind, let us return to the apparent Einstein Insanity of quantum physics.