Gaurav Gupta’s Post

European #XFEL reaches unmatched level in measurements of matter under extreme conditions   Scientific journal highlights corresponding publication as “Editor’s suggestion”   Researchers at European XFEL have developed an innovative method to study warm dense matter with unprecedented accuracy. This kind of matter, that exists between condensed matter and plasma #physics, can be found, for example, in #astrophysical objects or is created during inertial confinement #fusion. For the contributing scientists at the Center for Advanced Systems Understanding (#CASUS), this advancement is a great aid to their mission of lifting the analysis of warm dense matter onto a solid foundation.   https://lnkd.in/dWYfxgqb   #HZDR

✨ Editor’s Choice Article ✨ Casimir Effect Invalidates the Drude Model for Transverse Electric Evanescent Waves | Article by Galina L. Klimchitskaya and Vladimir M. Mostepanenko https://lnkd.in/e6zprzT3 Central Astronomical Observatory at Pulkovo of the Russian Academy of Sciences; Peter the Great St.Petersburg Polytechnic University; Kazan State University; MDPI #Casimirforce #Lifshitztheory #Drude #model #plasma #mode #propagatingwaves #evanescentwaves #magneticpolarizations #physics This article belongs to the Special Issue: 75 Years of the Casimir Effect: Advances and Prospects https://lnkd.in/gmnPP8Bd #Abstract We consider the Casimir pressure between two metallic plates and calculate the four contributions to it determined by the propagating and evanescent waves and by the transverse magnetic and transverse electric polarizations of the electromagnetic field. The range of interplate separations is considered where nearly the whole pressure has its origin in the electromagnetic response of conduction electrons. In the Casimir physics, this response is described either by the dissipative Drude model resulting in contradictions with the measurement data or by the experimentally consistent but dissipationless plasma model. It is shown that the total transverse magnetic contribution to the Casimir pressure due to both the propagating and evanescent waves and the transverse electric contribution due to only the propagating waves, computed by means of the Drude model, correlate well with the corresponding results obtained using the plasma model. We conclude that the disagreement between the theoretical predictions obtained using the Drude model and precision measurements of the Casimir force is not caused by the account of dissipation in itself, but arises from an incorrect description of the response of metals to the low-frequency transverse electric evanescent waves by this model. It is demonstrated that the Drude model has no supporting experimental evidence in the range of transverse electric evanescent waves, so that the above conclusion is consistent with all available information. The alternative test of the Drude model for the transverse electric evanescent waves suggested in the framework of classical electrodynamics is discussed.

An unexpected potential use of CERN's particle detectors. Researchers at Harvard University, University of Nevada and Pennsylvania State University have demonstrated that the tile calorimeter at the center of CERN's ATLAS and CMS detectors could detect the flux of high-energy supernova neutrinos. Furthermore, according to their calculations, they could also characterize the flavor of the neutrinos, and to discriminate between neutrinos and antineutrinos. The findings have been published in Physical Review Letters (8 February, 2024). https://lnkd.in/dETN8Zhb #physics #physicsnews #particlephysics #astronomy #astrophysics #neutrino #neutrinos #atlas #cms #cern #supernova #supernovae

Hunting the Super Proton Synchrotron's magnetic resonance. Researchers from CERN and the Goethe University in Frankfurt, have measured and quantified a magnetic resonance that diverts the course of the particles in CERN's Super Proton Synchrotron. They monitored the position of the particles for approximately 3000 beams and measured where they were centered, demonstrating that the experimental findings agree with what had both theory and simulations predicted. This discovery will allow the development of a theory to describe the motion of individual particles in the presence of this kind of resonance, in order to mitigate the beam degradation in the next updates. The findings have been published in Nature Physics (20 March, 2024). https://lnkd.in/djN4H_5c #physics #physicsnews #cern #sps #resonance #particlephysics

In search of quantum gravity. Researchers led by Cristian Panda from UC Berkeley, have improved the precision of lattice atom interferometers in order to find the quantum nature of gravity. These instruments use laser beams to make atoms levitate in a quantum superposition of two states, in which the difference of phase depends on the value of gravity. Deviations from the classical values of gravity would be experimental evidence of quantum gravity or other models trying to explain gravity. In their new experimental set ups, they were able to improve four times the precision of previous experiments, and could find no deviation from the Newtonian values. The team is now developing a new lattice atom interferometer that is expected to be 100 times more accurate than the current experiment, and thus hopefully sensitive enough to detect the quantum properties of gravity. The findings have been published in Nature (26 June, 2024). https://lnkd.in/djcpsDMG #physics #physicsnews #quantumphysics #gravity #latticeatominterferometer

I get this question all the time. All, the, time. How can a Propellantless Propulsion System be possible? How does it conserve momentum? I'm not a physicist, but before you say it's impossible, you should know that it is not. The concepts that would govern a device like SFE exist outside of the currently accepted framework of contemporary Physics and therefore propulsion physics. I can tell you that we have experimentally measured a change in the inertial mass of SFE devices and that is what has led us to the conclusion that we are observing a self-accelerating phenomenon produced by a local negative energy effect. It does not take a lot of negative energy to create a very large self-accelerating effect. This is a very strange new twist in physics. Now you can understand why something like propellantless propulsion seems so alien and a forbidden taboo subject matter in physics. It only gets stranger beyond this point. Everything you hold dear in propulsion physics will be crushed. You've been warned. https://lnkd.in/eBgD_D6w

🌌 CENTRA Research News! 🌌 Jorge Rocha, #professor at ISCTE - Instituto Universitário de Lisboa, recently published "Weak cosmic censorship and the rotating quantum BTZ black hole" in the Journal of High Energy Physics #JHEP! This study tests the weak cosmic censorship conjecture, which examines if curvature singularities in black hole spacetimes are always concealed within an event horizon, thereby maintaining predictivity in gravitational theory. Using Wald's method, Jorge's research analyzes the impact of a test particle with large angular momentum on an extremal quantum rotating BTZ black hole. The findings reveal that, despite quantum effects, attempts to destroy the black hole fail, with the particle only maintaining the black hole's extremal state. Additionally, numerical evidence indicates that significant backreaction from quantum fields discourages violations of cosmic censorship. 🔗 Learn more: https://lnkd.in/dZGH79jz #Physics #BlackHoles #CosmicCensorship #QuantumGravity #ScientificResearch #CENTRA #Astrophysics #GravitationalTheory #SpaceScience #ResearchInnovation

A collaborative team from the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) and the Università degli Studi di Salerno has made a groundbreaking discovery in the realm of quantum mechanics and gravity. By levitating a submillimeter-scale magnetic particle inside a type I superconducting trap, they have extended gravity measurements to the astonishingly low forces of attonewtons, offering new insights into gravitational coupling. This innovative experiment not only bridges the gap between quantum mechanics and general relativity but also opens up possibilities for table-top testing of quantum superposition and entanglement in gravitating systems. With implications ranging from the fundamental understanding of gravity at microscopic scales to potential applications in high-frequency communication technology, this research marks a significant step towards uncovering the mysteries of the universe. The synergy of theoretical insight and experimental prowess sets a new precedent in the quest to unify the forces of nature. https://lnkd.in/gMdXt76K #Physics #Quantum #IP #VC #Patents #DeepTech

⚛️ It's #Physics Time: Particle Accelerators - Colliders and Fixed Target Experiments ⚛️ 📜 Historical Background: Unveiling the Mysteries of the Universe The journey of particle accelerators is nothing short of fascinating. From the early 20th century, when the first simple versions were developed, to the colossal machines of today, particle accelerators have been instrumental in peering into the very fabric of our universe. They have been the backbone for new discoveries, providing insights into fundamental particles and forces. 🌌 Understanding Particle Accelerators: Colliders vs Fixed Target Experiments In the world of particle accelerators, two main types stand out: colliders and fixed target experiments. 1️⃣ Colliders: Here, two particle beams are accelerated in opposite directions and made to collide head-on. This method is incredibly efficient as it allows the entire initial energy to be used for creating new particles, such as proton-antiproton pairs. The attached photo demonstrates this concept through mathematical derivations. Famous examples include the Large Hadron Collider (LHC) at CERN and the Tevatron at Fermilab. 2️⃣ Fixed Target Experiments: These involve a single accelerated particle beam striking a stationary target. Though less powerful in energy compared to colliders, they are invaluable for specific types of research. Facilities like SLAC National Accelerator Laboratory in the US and the Proton Synchrotron at CERN are prominent examples. 🌟 Major Breakthroughs: A Legacy of Discoveries Particle accelerators have been the birthing ground for monumental discoveries. The identification of quarks, the confirmation of the existence of the Higgs boson, and insights into antimatter are just a few examples. Each breakthrough has not only advanced our understanding of physics but also affirmed theories that seemed just theoretical. 💡 Testing Extremes: Probing the Frontiers of Knowledge These accelerators are our tools for testing theories under the most extreme conditions conceivable by humankind. They help us to challenge, refine, and sometimes even overturn our understanding of the universe. #ParticlePhysics #AcceleratingDiscovery #ScienceInnovation #ColliderResearch #PhysicsBreakthroughs

Canadian particle accelerator TRIUMF outlines Canada’s contribution to the crucial upgrades of CERN’s Large Hadron Collider and the potential for these advancements to usher in a new era of particle physics research. Within the many narratives of modern science, certain discoveries have emerged, like thunderclaps, reshaping our understanding of the universe with seismic force. In the realm of contemporary physics, no such discovery has reverberated louder than the first experimental proof of the Higgs boson, a subatomic particle of legendary stature. Read the whole article from TRIUMF Head of Communications Stu Shepherd here, to appear in the forthcoming edition of the Innovation News Network Innovation Platform: https://lnkd.in/eKHkqa2a #science #research #canada #cern #triumf #horizoneurope