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De natura rerum, mais plutôt au niveau subatomique.

The many paths of muon math. Like racecars on a track, thousands of particles called muons zip around an experiment’s giant 50-foot circular magnet at 99.9% of the speed of light.

The many paths of muon math

After making a few hundred laps in less than a millisecond, the muons decay and are soon replaced by another bunch. The goal of the experiment, Fermilab Muon g-2, is to better understand the properties of muons, which are essentially heavier versions of electrons, and use them to probe the limitations of the Standard Model of particle physics.

Specifically, physicists want to know about the muons’ “magnetic moment”—that is, how much do they rotate on their axes in a powerful magnetic field— as they race around the magnet? In 2001, an experiment at the US Department of Energy’s Brookhaven National Lab found that the muons turned more than theory predicted. The result surprised the physics community: If there really were a discrepancy, it could be a hint of new physics, like some as-yet-unknown particle influencing the muon. LHC creates matter from light. The Large Hadron Collider plays with Albert Einstein’s famous equation, E = mc², to transform matter into energy and then back into different forms of matter.

LHC creates matter from light

But on rare occasions, it can skip the first step and collide pure energy—in the form of electromagnetic waves. Last year, the ATLAS experiment at the LHC observed two photons, particles of light, ricocheting off one another and producing two new photons. This year, they’ve taken that research a step further and discovered photons merging and transforming into something even more interesting: W bosons, particles that carry the weak force, which governs nuclear decay. This research doesn’t just illustrate the central concept governing processes inside the LHC: that energy and matter are two sides of the same coin. It also confirms that at high enough energies, forces that seem separate in our everyday lives—electromagnetism and the weak force—are united. First sighting of mysterious Majorana fermion on a common metal.

Physicists at MIT and elsewhere have observed evidence of Majorana fermions—particles that are theorized to also be their own antiparticle—on the surface of a common metal: gold.

First sighting of mysterious Majorana fermion on a common metal

This is the first sighting of Majorana fermions on a platform that can potentially be scaled up. The results, published in the Proceedings of the National Academy of Sciences, are a major step toward isolating the particles as stable, error-proof qubits for quantum computing. In particle physics, fermions are a class of elementary particles that includes electrons, protons, neutrons, and quarks, all of which make up the building blocks of matter. Did German physicists accidentally discover dark matter back in 2014? Could we have already discovered dark matter?

Did German physicists accidentally discover dark matter back in 2014?

That's the question put forth in a new paper published Feb.12 in the Journal of Physics G. The authors outlined how dark matter might be made of a particle known as the d*(2380) hexaquark, which was likely detected in 2014. Dark matter, which exerts gravitational pull but emits no light, isn't something anyone's ever touched or seen. Cette scientifique tente d'ouvrir un portail vers un univers parallèle. Le portail est prêt.

Cette scientifique tente d'ouvrir un portail vers un univers parallèle

Selon The Inde­pendent, la physi­cienne améri­caine Leah Brous­sard va bien­tôt tenter de prou­ver l’exis­tence d’un univers paral­lèle. Une liaison entre deux atomes filmée pour la première fois. En 1895, le Français Louis Lumière présentait au public La Sortie de l’usine Lumière à Lyon, 45 secondes d’images tournées au cinématographe et comptant parmi les toutes premières de l’histoire du cinéma. 125 ans plus tard, ce sont là encore quelques secondes d’images en noir et blanc qui viennent marquer, cette fois, le petit monde de la physique.

Une liaison entre deux atomes filmée pour la première fois

Des chercheurs de l’Université d’Ulm, en Allemagne, et de l’Université de Nottingham, au Royaume-Uni, sont parvenus à filmer pour la toute première fois les instants précis où deux atomes se lient et se séparent. This physicist's ideas of time will blow your mind. Time feels real to people.

This physicist's ideas of time will blow your mind

But it doesn’t even exist, according to quantum physics. “There is no time variable in the fundamental equations that describe the world,” theoretical physicist Carlo Rovelli tells Quartz. If you met him socially, Rovelli wouldn’t assault you with abstractions and math to prove this point. La matière noire. This Genius Map Explains How Everything in Physics Fits Together. Physics is a huge, complex field.

This Genius Map Explains How Everything in Physics Fits Together

It also happens to be one of the most fascinating, dealing with everything from black holes and wormholes to quantum teleportation and gravitational waves. But unless you have an innate knowledge of the field, it's pretty hard to figure out how all these concepts actually fit together - and how they tie in with the stuff like the physics of inertia and circuits that we learnt in high school. After all, everyone is constantly trying to prove Einstein wrong, and Stephen Hawking famously struggled to come up with a 'theory of everything', so it's easy to get confused about how things do actually fit together in physics (if at all).

Integrated Information Theory. L'infini de la matière : le vide. La physique quantique décrit toute substance (matière, rayonnement ou interactions) sous forme d'un champ quantique.

L'infini de la matière : le vide

Les propriétés d'un tel objet le distinguent des objets (particules ou ondes) que manipule la physique classique. Découvrons ici l'infini de la matière avec le concept de vide quantique. « En réalité, le principe réside dans l'énergie et l'énergie n'est rien d'autre que principe ; l'énergie réside dans le vide et le vide n'est rien d'autre qu'énergie. » Wang Fuzhi (1619-1692). Théorie quantique des champs et états. Physicists Discover That Strange 'Ferroelectric' Particles Actually Exist, And Could Change Computing.

Black holes from a previous universe shine light on our own. Cosmologists say they have found remnants of a bygone universe in the afterglow of the Big Bang found in the Cosmic Microwave Background (CMB).

Black holes from a previous universe shine light on our own

The discovery gives weight to the controversial theory of Conformal Cyclic Cosmology, or CCC, that suggests our universe is just one of many, built from the remains of a previous one in the Big Bang 13.6 billion years ago. The theory describes an eternal cycle of Big Bang events, repeating into the far distant future, the end of our universe giving rise to a new one. Bizarre Superfluid Has Negative Mass. Scientists have created a new superfluid that has a negative mass, meaning that if it's pushed to the right, it accelerates to the left and vice versa. The bizarre behavior may sound like a freakish violation of nature, but it is a phenomenon that physicists have seen hints of before. However, this is the first time that negative mass has been demonstrated without ambiguity in a lab, said Han Pu, a theoretical physicist at Rice University who was not involved in the new research.

New scale for electronegativity rewrites the chemistry textbook. Electronegativity is one of the most well-known models for explaining why chemical reactions occur. Now, Martin Rahm from Chalmers University of Technology, Sweden, has redefined the concept with a new, more comprehensive scale. His work, undertaken with colleagues including a Nobel Prize-winner, has been published in the Journal of the American Chemical Society. The theory of electronegativity is used to describe how strongly different atoms attract electrons. By using electronegativity scales, one can predict the approximate charge distribution in different molecules and materials, without needing to resort to complex quantum mechanical calculations or spectroscopic studies. This is vital for understanding all kinds of materials, as well as for designing new ones.

Dark matter detection may involve a pinch of salt. The quest to test quantum entanglement. Over 12 billion years ago, speeding particles of light left an extremely luminous celestial object called a quasar and began a long journey toward a planet that did not yet exist. More than 4 billion years later, more photons left another quasar for a similar trek. As Earth and its solar system formed, life evolved, and humans began to study physics, the particles continued on their way. Ultimately, they landed in the Canary Island of La Palma in a pair of telescopes set up for an experiment testing the very nature of reality.

The experiment was designed to study quantum entanglement, a phenomenon that connects quantum systems in ways that are impossible in our macro-sized, classical world. When two particles, like a pair of electrons, are entangled, it’s impossible to measure one without learning something about the other. Antimatter seen in two places at once thanks to quantum experiment. All Things Neutrino. Already beyond the Standard Model. Tested and verified with ever increasing precision, the Standard Model of particle physics is a remarkably elegant way of understanding the relationships between particles and their interactions. But physicists know it’s not the whole story: It provides no answer to some puzzling questions, such as the identity of the invisible dark matter that constitutes most of the mass in the universe.

As a result, in the search for physics beyond the Standard Model, one area of notably keen interest continues to be neutrinos. In the Standard Model, neutrinos come in three kinds, or flavors: electron neutrinos, muon neutrinos and tau neutrinos. This mirrors the other matter particles in the Standard Model, which each can be organized into three groups. Weird signals in Antarctica could be hints of a new realm of physics. Laser beams have gravity and can warp the fabric of the universe. Dark matter vibes. A dark matter experiment scheduled to go online at the Canadian underground laboratory SNOLAB in the early 2020s will conduct one of the most sensitive searches ever for hypothetical particles known as weakly interacting massive particles, or WIMPs. Scientists consider WIMPs strong dark matter candidates. But what if dark matter turns out to be something else? After all, despite an intense hunt with increasingly sophisticated detectors, scientists have yet to directly detect dark matter.

That’s why researchers on the SuperCDMS dark matter experiment at SNOLAB are looking for ways to broaden their search. First particle tracks seen at ProtoDUNE. The largest liquid-argon neutrino detector in the world has just recorded its first particle tracks, signaling the start of a new chapter in the story of the international Deep Underground Neutrino Experiment. DUNE's scientific mission is dedicated to unlocking the mysteries of neutrinos, the most abundant matter particles in the universe. Scientists on the DUNE collaboration think that neutrinos may help answer one of the most pressing questions in physics: why we live in a universe dominated by matter. In other words, why we are here at all. Des nouvelles du boson de Higgs. Six ans après sa découverte, le boson de Higgs a été pris en flagrant délit de désintégration en d’autres particules fondamentales, les quarks b par les équipes du CERN, confirmant une théorie scientifique datant des années 1960. Le boson de Higgs, la particule qui explique la masse de toutes les autres, vient de nous livrer un nouveau secret.

Pour la première fois depuis sa découverte en 2012, les chercheurs du CERN ont annoncé ce mardi 28 août avoir observé sa désintégration dans le Grand collisionneur de hadrons (LHC) basé à Genève – un tunnel en forme d’anneau de 27 kilomètres, dans lequel s’entrechoquent des faisceaux de protons. Cela fait plusieurs années que les chercheurs tentent d’observer ce canal de désintégration.

Le Boson de Higgs se désintègre en effet, comme prévu statistiquement par les théoriciens dans 60% des cas, en quark bottom – dit quark b. Forging a quantum leap in quantum communication. Quantum communication, which ensures absolute data security, is one of the most advanced branches of the "second quantum revolution". In quantum communication, the participating parties can detect any attempt at eavesdropping by resorting to the fundamental principle of quantum mechanics - a measurement affects the measured quantity. Thus, the mere existence of an eavesdropper can be detected by identifying the traces that his measurements of the communication channel leave behind. The major drawback of quantum communication today is the slow speed of data transfer, which is limited by the speed at which the parties can perform quantum measurements. Researchers at Bar-Ilan University have devised a method that overcomes this "speed limit", and enables an increase in the rate of data transfer by more than 5 orders of magnitude!

You thought quantum mechanics was weird: check out entangled time. In the summer of 1935, the physicists Albert Einstein and Erwin Schrödinger engaged in a rich, multifaceted and sometimes fretful correspondence about the implications of the new theory of quantum mechanics. The focus of their worry was what Schrödinger later dubbed entanglement: the inability to describe two quantum systems or particles independently, after they have interacted. Until his death, Einstein remained convinced that entanglement showed how quantum mechanics was incomplete. Schrödinger thought that entanglement was the defining feature of the new physics, but this didn’t mean that he accepted it lightly.

Quantum Weirdness: Superposition and entanglement, in brief. Surprising result shocks scientists studying spin. Imagine playing a game of billiards, putting a bit of counter-clockwise spin on the cue ball and watching it deflect to the right as it strikes its target ball. With luck, or skill, the target ball sinks into the corner pocket while the rightward-deflected cue ball narrowly misses a side-pocket scratch. Now imagine your counter-clockwise spinning cue ball striking a bowling ball instead, and deflecting even more strongly—but to the left—when it strikes the larger mass. How Neutrinos Could Solve The Three Greatest Open Questions In Physics. Quantum 'spooky action at a distance' becoming practical.

Physicists Have Discovered a Way to Track Unobserved Quantum Particles. Secret Movements. La turbulence des ondes gravitationnelles dans l’Univers primordial. La possibilité de détecter directement les ondes gravitationnelles laisse présager d’importantes découvertes sur le fonctionnement de notre Univers. The Theory That Predicted Gravitational Waves May Be Wrong. What Is The difference Between Mass And Weight ? New Research Shows That Time Travel Is Mathematically Possible. Dark energy is mutating, with grave consequences for the cosmos. Dark matter and dark energy: Do they really exist? In A Quantum Universe, Even Mass Is Uncertain. What's the Speed of Dark? Expansion de l'univers : son accélération est trop rapide pour être expliquée par la physique actuelle. Researchers Just Discovered "Angel Particle" Which Is Both Matter And Anti-Matter At The Ssame Time.

Voici un nouvel état de la matière : l'excitonium. Quan­tum physics turned into tan­gi­ble re­al­ity. Icists create first direct images of the square of the wave function of a hydrogen molecule. Physicists Discover an Entirely New Type of Quantum Material. Physicist Just Confirmed New Form Of Matter In A Breakthrough Of 'Cosmic Significance' Détecter les dimensions supplémentaires grâce aux fusions d'objets massifs. New hole-punched crystal clears a path for quantum light. Wilhelm Röntgen. L’antimatière vient-elle de révéler la matière noire ?, par Aurélien BARRAU. Strange Numbers Found in Particle Collisions. Frontier of Physics: Interactive Map. Wilhelm Röntgen. The mystery of particle-wave duality; why everyday objects don't act like waves. A space-time sensor for light-matter interactions. Experiment shows that arrow of time is a relative concept, not an absolute one.

LHC data: how it’s made. Principe d'incertitude. Heisenberg uncertainty principle: A familiar concept misunderstood. L'intrication quantique pourrait en réalité posséder une distance maximale. Frustrated magnetic skyrmions and antiskyrmions could enable novel spintronic applications. Singularités orbifoldes de la variété des caractères. Einstein’s general relativity could improve simulations of the universe. Un nouveau liquide de spins quantique. Imagerie analytique, inspection 3D. LHC Sees No Dark Photons. Can faster-than-light particles explain dark matter, dark. Variété de Calabi-Yau. Dark Energy Survey publicly releases first three years of data - The Dark Energy Survey. Black Holes Control Star Formation. La grande aventure de l'uranium en Limousin. Théorie d'Everett. Measurements From CERN Suggest the Possibility of a New Physics. Relativity Survives Scrutiny, Again. New Research Shows That Time Travel Is Mathematically Possible. [1707.06050v1] A Spin Entanglement Witness for Quantum Gravity.

Quantum Entanglement: Love on a Subatomic Scale. National Superconducting Cyclotron Laboratory. Quantum Bayesianism Says You Can't Spell Reality Without "I" De la fonction d’onde l’univers mental. An international celebration of dark matter. The Subatomic Discovery That Physicists Considered Keeping Secret. Earth - The strange link between the human mind and quantum physics. Liquid spacetime: A very slippery superfluid, that's what spacetime could be like. Wave properties of particles can manifest in collisions. The new thermodynamics: how quantum physics is bending the rules.

Strange Numbers Found in Particle Collisions. Overview - The Dark Energy Survey. Collaboration and Sponsors - The Dark Energy Survey. Dark Energy Survey reveals most accurate measurement of dark matter structure in the universe. Connecting Higgs to Dark Matter. Quantum experiment in space confirms that reality is what you make it. Black hole–entanglement link could be simulated in lab, paper suggests. [1710.03920] Probing noncommutative theories with quantum optical experiments. Icists propose test of quantum gravity using current technology. Light’s weird dual nature weathers trip to space and back. Light bounced off satellites confirms quantum weirdness.

L’univers n’existe pas... en tous cas si on se fie à ce que les scientifiques sont capables de démontrer aujourd’hui. An Interview with Kip Thorne, Theoretical Physicist and 2017 Nobel Prize Recipient.