PSI Paul Scherrer Institut’s Post

🌌 CENTRA Research News! 🌌 João Santos and Vítor Cardoso, #PhD student and #professor at Instituto Superior Técnico, published a paper in Physical Review D - American Physical Society: "Radiation reaction in weakly magnetized black holes: Can the tail term be ignored in the strong field regime?" Their study investigates radiation from charged particles around a Schwarzschild black hole in a uniform magnetic field, finding that the nonlocal tail term in the radiation reaction force is essential for capturing particle dynamics, contrary to previous claims. This term is only negligible when the magnetic force greatly dominates the gravitational force. Additionally, they report a "horizon dominance effect," where the energy absorbed by the black hole increases with decreasing particle velocity. This research offers new insights into black hole dynamics and particle behavior in strong gravitational and magnetic fields. 🔗 Learn more: https://lnkd.in/dYmQgfam #Physics #BlackHoles #RadiationReaction #ScientificResearch #CENTRA #Astrophysics #Gravitation #Innovation

High density relativistic electron-positron plasma in the lab. Researchers led by Charles Arrowsmith from the University of Oxford have developed a new technique to produce plasma fireballs on Earth similar to those found near black holes and neutron stars. The process is as follows: A proton from CERN's Super Proton Synchrotron (SPS) is sent to impact against carbon nuclei, producing the collision a shower of elementary particles, among which are a large number of neutral pions. When the latter decay, they emit two high-energy gamma rays which interact with the electric field of Tantalum nuclei, generating electron-positron pairs in the form of a fireball plasma. These steps allow the production of between 100 and 1000 times more pairs than any other relativistic electron-positron plasma previously produced in a lab. The findings have been published in Nature Communications (12 June, 2024). https://lnkd.in/dB323__J #physics #physicsnews #quantumphysics #cern #sps #plasma #electronpositronpair #electron #positron #antimatter

Einstein's Ripples Recreated: Scientists Simulate Gravitational Waves with Cold Atoms Researchers have discovered a method to simulate gravitational waves in a laboratory using cold atoms, offering a simpler way to study these elusive phenomena. Gravitational waves, predicted by Einstein in 1916 and detected in 2015, are ripples in space-time caused by cosmic events like black hole collisions. Detecting them is extremely difficult due to their minuscule size. Still, a team from the Okinawa Institute of Science and Technology and other institutions found that quantum phenomena in cold atom systems, specifically in Bose-Einstein Condensates with spin nematics, can mimic gravitational waves. This breakthrough allows more accessible research on these waves in a controlled setting. #GravitationalWaves #QuantumPhysics #EinsteinTheory #ScientificBreakthrough #ColdAtoms #PhysicsRevolution #SpaceScience #LabSimulation #BoseEinsteinCondensate #Astrophysics #WissenResearch

The Large Hadron Collider (LHC) at CERN will resume its operations after a two-year hiatus during the total solar eclipse on April 8. 🌌🔬 CERN intends to collide protons at speeds close to the speed of light, circulating around its 17-mile circumference more than 11 thousand times per second - to search for invisible particles that power the Universe and to recreate conditions one second after the Big Bang. The goal is to study dark matter, which is believed to constitute about 28% of the mass of the Universe, and other subatomic particles that may provide answers to questions about the formation of the Universe. Using the capabilities of the LHC to recreate conditions similar to those after the Big Bang, CERN scientists expect significant breakthroughs in understanding the mysterious dark matter. #CERN #LHC #DarkMatter #physics #cosmology #science #SolarEclipse

Glad to share that our research paper, "Antenna Design for Absolute Sky Measurements at Gigahertz Frequencies - A First Step Toward Detecting CMB Spectral Distortions from Recombination," has been published in the Astronomical Journal. 🔗 Read the full paper here: https://lnkd.in/gj4QV-2k In this work, we present a novel scalable dual polarised broadband antenna design motivated by detecting the spectral distortions in the CMB spectrum in the 2.5–4 GHz band. This antenna is capable of maintaining the spectral quality of the measured sky spectrum to 1 part in 10^3 over the full band and outperforms conventional broadband antennas by at least an order of magnitude. This antenna meets the baseline design criteria for an experiment that can make an absolute measurement of the sky spectrum at the millikelvin level, thereby making it capable of improving foreground models to global signal detection experiments (including those from cosmic dawn and the epoch of reionization) and addressing the problem of the excess radio background at 3.3 GHz reported by the ARCADE2 experiment. I Thank Dr. Mayuri S and Dr. Debdeep Sarkar for their invaluable guidance and support throughout this work. Looking forward to learning and contributing more to this field of work. #Research #Astrophysics #CMB #AntennaDesign #AstronomicalJournal

🌌 CENTRA Research News! 🌌 Enrico Cannizzaro and Vítor Cardoso, #ERC postdoc and #professor at Instituto Superior Técnico, published a letter in Physical Review D - American Physical Society: "Impact of a plasma on the relaxation of black holes" Their study reveals that interstellar plasma can dramatically affect black hole spectroscopy. If plasma permeates a black hole's light ring, it completely screens electromagnetic modes from the gravitational-wave signal, changing our understanding of black hole dynamics. Additionally, near equal-mass mergers of charged black holes can create a near vacuum cavity, exciting ringdown "echoes" with slowly decaying amplitudes. These echoes could serve as a critical indicator of the presence of plasma near charged black holes. 🔗 Dive in: https://lnkd.in/dj3HpdNd #Physics #BlackHoles #GravitationalWaves #ScientificResearch #CENTRA #Astrophysics #PlasmaPhysics #Innovation #SpaceScience

I'm thrilled to share my latest research: "Exploring Supersymmetry, Gravitational Waves, and Extra Dimensions through CMB Simulations: A Detailed Study". In this comprehensive study, we delve deep into the realms of #supersymmetry, #gravitationalwaves, and the intriguing possibility of #extradimensions, using cutting-edge simulations of the Cosmic Microwave Background (CMB). Key Highlights: - Detailed analysis of supersymmetric particles' potential impact on the CMB. - Exploration of gravitational wave signatures within various cosmological models. - Insights into how additional spatial dimensions could influence the fabric of the universe. This work aims to push the boundaries of our current understanding of the cosmos, contributing to the ongoing search for a unified theory of everything. The findings are not only a step forward in theoretical physics but also open new avenues for experimental validation. I would love to connect with fellow researchers, physicists, and enthusiasts to discuss these findings and explore future collaborations. Your feedback and insights are highly appreciated! #Physics #Cosmology #CMB #QuantumMechanics #Astrophysics #Research #Science #BlackHoles #StringTheory #AcademicResearch

In Stage IV of our research, we are venturing into uncharted territories by attempting to isolate and determine the current-voltage characteristics of Argon, an inert gas. This involves identifying the elemental transitions to overcome the potential issue of mixed mole fraction concentrations of various elements, which could result in a spread in the optical spectroscopic images based on frequency. #Astrophysics #spaceengineering #iitindore #research #technology #education

🌟 NATIONAL CONFERENCE on Frontiers in Theoretical & Experimental Physics 🌟 🗓️ New Dates: September 18-19, 2024 🗓️ Due to a local holiday and anticipated transportation disruptions, we have rescheduled the event to ensure a smooth and successful experience for all participants. 📢 The last date for submission remains 13 September, 2024. Don't miss this opportunity to present your research and network with leading minds in the field! Sponsored by #DBT, this conference will cover a wide array of topics, including: #NuclearPhysics #india #HighEnergyPhysics #RadiationPhysics #PlasmaPhysics #Spectroscopy #Thermodynamics #StatisticalPhysics #MaterialScience #Nanotechnology #RenewableEnergy #Astrophysics #Biophysics #NonlinearDynamics #QuantumTechnologies Join us in exploring the cutting edge of #Physics and related disciplines. Let’s drive forward scientific discoveries together! 🔗 Learn more and register here: https://lnkd.in/gb8v-_gH #NationalConference #HigherEducation #India #LinkedIn #Conference #Research #PhysicsCommunity #Innovation #Academia #scienceconference #academicresearch #STEM #theoreticalphysics #experimentalphysics #innovation #researchcommunity #scientificdiscoveries #futuretechnologies #highereducationconference #interdisciplinaryresearch #advancedmaterials #cuttingedgeresearch #academiccollaboration #postdocresearch #globalresearch #physicsresearch #technologyinnovation #sustainabledevelopment #sciencedevelopment #engineering

The Kumar-Ghosh black hole Parameter Estimation Method Our paper, "Black Hole Parameter Estimation from Its Shadow," co-authored with Rahul Kumar Walia and published in The Astrophysical Journal (Vol. 892, 2020, p. 78; DOI: 10.3847/1538-4357/ab77b0), introduces a novel approach for estimating parameters of rotating black holes. Our technique, now popularly known as the Kumar-Ghosh method, utilizes observables in ordinary integrals to characterize the shape of a black hole's shadow. This method has proven to be a robust framework for parameter estimation and has received significant recognition, with 144 citations to date! It's gratifying to see our work advance the field of black hole research and contribute to the scientific community. Kudos to Rahul Kumar for his dedication and groundbreaking contributions! #BlackHoles #Astrophysics #Research #KumarGhoshMethod #Science