Articles tagged with String Theory
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Researchers from Penn University propose a five-member particle package, known as the 5-plet, that string theory cannot accommodate. This particle family is absent in any known string-based calculation, raising concerns about the framework's validity.
Researchers propose a new subset of string theories that incorporate dynamic tension could help describe the real universe without violating observational constraints. This approach may alleviate the 'swampland problem,' which has hindered conventional string theory's ability to reproduce inflation and dark energy.
Physicists have discovered a new theoretical framework called supermazes that redefine the concept of black holes, providing a more universal picture of their microstructure. Supermazes are based on string theory and offer a detailed portrait of the microscopic structure of brane black holes.
A team of physicists has validated string theory by developing an innovative mathematical method that points to its inevitability. This breakthrough uses the bootstrap principle to show that string theory is the only consistent answer for scattering amplitudes, bringing researchers closer to understanding the universe.
A nearby supernova explosion could produce gamma rays that pinpoint the mass of a key dark matter candidate, the axion. The Fermi Gamma-ray Space Telescope would need to be in position to detect these gamma rays within 10 seconds of the supernova's core collapse.
Professor Ruth Britto and her international team will develop new algorithmic methods with applications in mathematics, particle physics, and gravity. They aim to tackle longstanding computational bottlenecks and push the boundaries of numerous areas of theoretical physics.
Scientists at IISc have found a new series representation for pi that combines specific parameters in a way that rapidly arrives at the exact value of pi. This discovery could lead to practical applications in physics and potentially solve long-standing challenges in representing pi as a combination of mathematical components.
A team of researchers successfully demonstrated the principles of gravity-mediated entanglement in a photonic quantum simulation. This breakthrough provides crucial insights into the nature of gravity and its interaction with quantum mechanics.
Researchers at Rice University and the University of Illinois Urbana-Champaign have found that chemical reactions can scramble quantum information, similar to black holes. This discovery could lead to new methods for controlling molecular behavior and improving the reliability of quantum computers.
Researchers have demonstrated a connection between quantum entanglement and topology, allowing for the preservation of quantum information even when entanglement is fragile. This breakthrough enables a new encoding mechanism that utilizes entanglement to encode quantum information in scenarios with minimal entanglement.
A new theory unifies gravity and quantum mechanics by preserving Einstein's classical concept of spacetime, proposing random fluctuations in spacetime that can be verified experimentally. The theory challenges the pursuit of a quantum theory of gravity, offering an alternative approach to reconcile the two fundamental theories.
Researchers have observed the decay of two neutron-rich isotopes, oxygen-28 and oxygen-27, providing new insights into nuclear structure. The study's findings suggest that these isotopes do not exhibit a closed shell structure, challenging current theories and offering opportunities for further investigation.
Researchers with the NANOGrav collaboration have detected the gravitational wave background for the first time, revealing a perpetual chorus of ripples in space-time. The discovery is made possible by observing stars called pulsars that act as celestial metronomes.
Researchers at the University of Toronto have made a breakthrough in understanding dark matter and its impact on the universe's large-scale structure. By analyzing cosmic microwave background data and galaxy clustering patterns, they suggest that ultra-light axion particles could account for the observed lack of clumpiness.
Researchers at Johns Hopkins University have simulated an object called a topological soliton, which distorts space like a black hole but behaves differently when releasing weak light rays. The findings suggest there could be other types of celestial bodies in space hiding from even the best telescopes.
Physicists search for signs of radiation produced by a violation of the Pauli exclusion principle, which determines electron arrangement in atoms. No evidence of violation has been found so far, ruling out some quantum-gravity models.
The book delves into the concept of emergence in two domains: condensed matter physics and quantum gravity. It reveals surprising connections between seemingly disparate areas of physics, shedding light on how mysterious materials work and the origins of space and time.
Researchers have developed a new model that combines nuclear physics and string theory to describe the transition to dense and hot quark matter in neutron star collisions. The model allows for the calculation of gravitational-wave signals, showing that both hot and cold quark matter can be produced.
A University of Helsinki research team used holographic duality to model early universe phase transitions and their potential impact on gravitational wave signals. The study, published in Physical Review Letters, suggests that such collisions could create powerful ripples in spacetime detectable by satellite missions like LISA.
Researchers discover a connection between two approaches to quantum gravity, finding that one directly implies the other. This link challenges long-held distinctions and suggests all theories of quantum gravity are holographic.
A new FQXi report re-assesses the 'fine-tuned universe' hypothesis, proposing that intelligent life could have evolved under drastically different physical conditions. This challenges popular arguments for a multiverse and suggests that the universe may be able to produce life under a wider range of circumstances than previously thought.
A new study by Ohio State University researchers has confirmed that black holes are indeed giant fuzzballs, a concept first proposed in 2004. The study proved theorems showing that the fuzzball theory remains the most likely solution to Hawking's paradox, which had long plagued the string theory community. In contrast, the wormhole par...
A Cornell University-led team developed a machine learning tool called Correlation Convolutional Neural Networks (CCNN) to parse quantum matter and make distinctions in the data. CCNN can identify relationships among microscopic properties that are impossible to determine at the scale of quantum systems.
Researchers propose searching for an axion analogue of the Cosmic Microwave Background (CMB) to learn about the early Universe. If successful, this could reveal new insights into dark matter, phase transitions, and inflation.
New research uses M87* data to test Einstein-based and string-inspired theories, constraining the validity of these models. The study suggests that current data aligns well with Einstein's theory and has limitations for string-based theories.
Researchers have solved a long-standing mystery about how particles behave outside a black hole's photon sphere using string theory. The study finds that string theory resolves singularities caused by tidal effects on nearby strings, supporting the idea of extended objects like strings as degrees of freedom in quantum gravity.
Effective Field Theories were introduced to simplify mathematics involved in unifying interactions. Steven Weinberg shares his expertise on these theories, which unify weak and electromagnetic interactions with the strong interaction. He also discusses implications for future research and applications in diverse areas.
Maxwell knots are peculiar solutions to the Maxwell equations, with unique electric and magnetic field line structures. The study suggests these knotted field lines may move in a special manner, preserving their knot nature, and could be integrable, linking them to other mathematical models.
Researchers from Utah State University, Thomas Hill and Andreas Malmendier, explore the duality between F-theory and heterotic string theory in eight dimensions. They discovered four unique ways to slice K3 surfaces as Jacobian elliptic fibrations, enabling investigation of underlying physical theories.
A team of researchers has successfully measured the dispersion relation of complex quantum many-body states 'Bethe strings' using inelastic neutron scattering experiments. The results confirm theoretical predictions made by Hans Bethe in 1931 and provide new insights into the properties of these excitations.
Physicists have successfully isolated and characterized Bethe strings in a real solid for the first time. The team used high magnetic fields to investigate SrCo2V2O8 crystals, obtaining a phase diagram that confirms their presence.
A recent study suggests that great apes possess theory of mind, demonstrated by their ability to anticipate an agent's action based on past experience. The findings indicate that these animals can use perceptual cues to infer another agent's belief about an object's location.
Japanese researchers propose a novel holographic framework to simulate black holes with a laboratory experiment. This setup can provide insight into the fundamental laws governing the cosmos at both tiny and vast scales.
Researchers propose a new structural concept for the Universe, including dark energy, which rides on an expanding bubble in an additional dimension. This model may solve the enigma of dark energy and provide insight into the creation and future fate of the Universe.
A team of scientists has found evidence of hydrodynamic electron flow in semimetal tungsten diphosphide, a high-purity quantum material. The discovery reveals the strongly interacting nature of electrons in these materials and suggests that the conversion of energy into thermal energy is limited by quantum mechanics.
Recent developments in string theory suggest a paradigm shift could be imminent, with some theories being incompatible with dark energy. Timm Wrase's calculations reveal that certain fields may not exist in string theory, contradicting the Higgs field's properties.
Alessio Figalli, a CNRS researcher, has been awarded the 2018 Fields Medal for his groundbreaking contributions to calculus of variations, optimal control, and partial differential equations. His work focuses on optimal transport theory, which has far-reaching implications in fields such as economics, geometry, and probability.
Researchers at Ohio State University have calculated that the probability of an electron burning up in a black hole is negligible. The study challenges the firewall argument, which suggested a ring of fire around black holes, and instead supports the fuzzball theory, which describes black holes as giant balls of yarn.
Hawking's final theory on the origin of the universe predicts a simpler and finite universe, contradicting the prevailing theory of eternal inflation. The new theory, developed by Hawking and ERC grantee Thomas Hertog, proposes that the universe is reasonably smooth and globally finite.
Hawking and Hertog propose a new theory that predicts the universe is finite and globally smooth, contradicting eternal inflation. They base their approach on string theory and holography, which describes the universe as a complex hologram.
Physicist Yasha Neiman proposes a new vantage point on space-time geometry, combining holography and twistor theory to develop a full-fledged quantum gravitational theory. This framework aims to unify quantum mechanics and General Relativity, overcoming current challenges in fundamental theory.
Physicists propose that knots in flexible strands of energy called flux tubes link elementary particles, explaining the three-dimensional nature of the universe. The theory provides a natural power source for cosmic inflation, solving two key problems in cosmology.
Dusa McDuff and Dietmar Salamon will receive the 2017 AMS Steele Prize for Exposition for their comprehensive book on J-holomorphic curves and symplectic topology. The prize recognizes their contributions to the field, which has rapid development since Mikhael Gromov's introduction of J-holomorphic curves in 1985.
The special theory of relativity has been found to be theoretically disproved, leading to questions about related physics theories. The paper reveals that experiments initially thought to demonstrate relativistic effects actually show null or incorrect results.
Valery Lunts and Vladimir Touraev, both from Indiana University, have been named 2016 American Mathematical Society Fellows for their significant work in algebraic geometry, category theory, and low-dimensional topology. The recognition highlights the university's total of 15 AMS fellows across campuses.
Ramanujan's original taxi-cab number, 1729, contains hidden meanings that relate to elliptic curves and K3 surfaces. Mathematicians have found a 'magic key' in his formula that can reveal secrets of these objects.
A study by researchers at the University of Fribourg and the University of Paris-Saint-Denis found no evidence for a link between conspiracist thinking and perceptions of randomness. Instead, participants who reported strong conspiracy theories tended to report other types of conspiracist beliefs, but not necessarily an intention or de...
Researchers confirmed two rare pentaquark states at CERN Large Hadron Collider, resolving a 51-year-old mystery. The discovery sheds light on quark binding and has significant implications for the Standard Model.
Scientists have described the molecular-level process of glass formation, combining two decades-old theories to predict bulk behavior, surface flow, and the elusive glass transition. The new theory has implications for developing nanomaterials with conductive properties and calculating pharmaceutical uptake.
Physicist Samir Mathur proposes that the surface of a black hole is not a fiery firewall but rather a benign copy machine creating an imperfect hologram. This idea counters the prevailing firewall theory and has significant implications for our understanding of the universe as a hologram.
A team of mathematicians has proved the Umbral Moonshine Conjecture, offering a finite calculation for this complex pattern. The conjecture has potential applications in various areas of math and physics.
Researchers propose a connection between string field theory and quantum mechanics, suggesting that string field theory could be the basis of all physics. They showed that fundamental quantum mechanical principles can be derived from the geometry of strings joining and splitting in string field theory.
Physicist Pierre Ramond has been awarded the 2015 Dannie Heineman Prize for his groundbreaking contributions to supersymmetry and superstring theory. His work provides a compelling picture of the universe, with tiny string-like objects vibrating to form particles.
UCSB physicist Tarun Grover has provided mathematical evidence for supersymmetry in a topological superconductor. The research, conducted with colleagues Donna Sheng and Ashvin Vishwanath, appears in the journal Science. Supersymmetry describes a unique relationship between particles, with fermions having boson superpartners.
Vladimir Touraev, a renowned expert in low-dimensional topology, has been awarded $2.7 million by the Russian government to establish a scientific center in Chelyabinsk, Russia. The center will facilitate collaboration between IU scientists and their counterparts in Russia, promoting international research opportunities.
A new study by Julian Sonner suggests that creating two entangled quarks simultaneously gives rise to a wormhole connecting the pair. This finding bolsters the idea that quantum entanglement may play a key role in understanding gravity, potentially leading to a theory of quantum gravity.
Stephon Alexander, a prominent physicist at Dartmouth College, has received the Edward A. Bouchet Award for his work on theoretical cosmology and its impact on early universe studies. The award recognizes his efforts to promote diversity in physics research.
Physicists at Vienna University of Technology have found a way to break the limits on viscosity, with implications for understanding superfluid helium and quantum theory. The results, published in Physical Review Letters, suggest quark-gluon-plasma can exhibit extremely low viscosity, even below previously established bounds.
Integral's observations show that quantum 'graininess' must be at much smaller scales than previously predicted, contradicting Einstein's General Theory of Relativity. The results limit the size of these grains to 10^-48 m or smaller, ruling out some string theories and quantum loop gravity theories.
A team of scientists at Duke University has measured the viscosity of an ultra-cold gas, confirming its potential as a scale model for exotic matter and high-temperature superconductors. The results also provide insight into predictions made using string theory.