Articles tagged with Topology
Researchers have discovered novel quantum phenomena in twisted graphene, including orbital magnetism, quantum anomalous Hall effect, and unconventional superconductivity. The review highlights the flatband electronic structure of magic-angle bilayer graphene, driving complex behaviors like correlated insulators and topological states.
Scientists created thresholdless corner vortex solitons that unify topological corner states and vortex light, enabling stable high-speed data transmission. The new solitons resist signal damage and maintain performance across a broad input power window.
Researchers create collapsible scissored surfaces based on networks of interconnected scissor mechanisms that can transform into curved surfaces. The new approach completes a trilogy of metamaterial design principles: origami (folds), kirigami (cuts), and pantograph lattices (linkages).
A new study reveals how generic electron interactions in 3D cubic lattices lead to Weyl topological superconductivity. The researchers found that repulsive electron interactions create a chiral d+id pairing state with an octupolar component, featuring eight gapless Weyl points.
Scientists at SUSTech and collaborators report first experimental observation of one-sided chiral hinge states in a 3D magnetic Weyl photonic crystal, verifying the 3D QHE of Fermi arcs. The discovery reveals a new physical mechanism for robust light transport in 3D space with potential applications in topological photonic devices.
Scientists successfully demonstrated reversible topological phase transitions in β-Ag2Te using out-of-plane gate voltages. This breakthrough enables the creation of functional electronic components with high current on-off ratios, overcoming previous hurdles in practical application.
Topological methods have become a robust testing ground in black hole physics, revealing distinctive topological attributes of diverse black hole solutions. The review summarizes recent work toward universal topological classifications of black holes, organizing them according to their global topological number and winding numbers.
FireANTs, an open-source algorithm, combines AI optimization and geometry to quickly match complex medical images. The new method can accomplish what took weeks in minutes, detecting subtle changes that signal disease or cognitive decline, making it practical for clinical practice.
A research team has successfully realized a non-Hermitian higher-order Weyl exceptional ring semimetal in a lossy acoustic metamaterial. The material hosts Weyl exceptional rings with dual topological charges, giving rise to Fermi arc surface states and surface-dependent skin effect.
A breakthrough in computer-designed thermoelectric generators has achieved more than eight times better efficiency than conventional designs. The innovative approach uses topology optimization to precisely control heat flow and minimize electrical resistance.
A research team from China has developed a material with high charge-to-spin conversion efficiency, achieving record-breaking performance in spintronic devices. The discovery utilizes nonsymmorphic symmetry to stabilize the material and enables ultra-low power magnetic switching.
Researchers show math underlying quantum gravity bears resemblance to quantum Hall effect, resolving cosmological constant problem. The Chern-Simons-Kodama state, a proposed ground state of quantum gravity, has a similar topology that keeps the cosmological constant's value stable.
The breakthrough enables complex states of light to be used in quantum computing, reducing imperfections and increasing scalability. This achievement paves the way for innovations in medicine, materials science, data management, and security.
Researchers have shown that topology can guide multiple, information-carrying light signals through chip-based photonic communication systems, making them more powerful and reliable. This breakthrough could enable the creation of networks of chips that communicate using light while taking advantage of topology's robustness.
A biologically inspired event camera measures vibrations accurately without expensive equipment, providing a cost-effective alternative to laser-based systems. The camera captures high-speed vibrations by recording brightness changes independently at each pixel, enabling precise amplitude, phase, and frequency estimation.
Quantized soliton pumping is observed in high-dimensional topological systems, governed by distinct-order Chern invariants. The study reveals integer- and fractional-quantized pumping behaviors and trapped regimes at strong nonlinearity.
Researchers investigate fractional quantum Hall effect in twisted MoTe2, revealing spontaneous ferromagnetic transitions and exotic correlated phases. The study identifies characteristic spectroscopic signatures of these phases, providing a unified framework for interpreting existing measurements.
Researchers have discovered a new quantum state of matter that combines quantum criticality and electronic topology, paving the way for advancements in computing, sensing, and materials science. This hybrid state has potential applications in real-world technologies due to its durable and highly sensitive qualities.
A team of researchers developed an AI algorithm capable of classifying complex topological phases of matter without relying on traditional mathematical tools. The breakthrough tackles the notoriously difficult realm of non-Hermitian systems and suggests that AI can surpass human capabilities in certain domains of abstract reasoning.
Researchers created particle-like vortex knots in chiral nematic liquid crystals and discovered they can be reversibly switched between different knotted forms using electric pulses. The study provides a physical testbed for mathematical ideas, opening possible new routes toward knot-based electro-optic and photonic technologies.
Researchers propose a 3D quantum anomalous Hall effect in Weyl semimetals, revealing unique boundary states and transport properties. The discovery completes the Hall effect family in three dimensions, holding promise for applications in low-power electronics and programmable devices.
A team of researchers at the University of Michigan and AFRL has developed a new method to create structures that passively impede vibrations, using complex geometry to elicit beneficial properties. The innovation builds on decades of theoretical research and utilizes advanced fabrication technologies like 3D printing.
The Rice Laboratory for Emergent Magnetic Materials aims to investigate fundamental interactions of magnetism and its role in next-generation technologies. Researchers will focus on emergent phases of matter, including unconventional superconductivity and quantum magnetism.
Researchers designed chiral amphiphilic pillar[5]arene derivatives that spontaneously formed chiral toroidal nanostructures and Möbius strip-like nanorings through non-covalent interactions. The assembly process exhibited solvent-dependent evolution, resulting in structure-dependent luminescent properties.
Researchers designed chiral amphiphilic pillar[5]arene derivatives to form stable chiral toroidal nanostructures and Möbius strip-like nanorings through non-covalent interactions. The assembly process exhibits solvent-dependent evolution, controlling luminescent properties and enabling the creation of functional chiral nanomaterials.
Researcher Manuel Krannich has been awarded a five-year ERC starting grant to investigate the connections between symmetries of high-dimensional manifolds and laws of algebra. His project, 'Manifolds and Functor Calculus' (MaFC), combines manifold theory with higher-level algebra.
Researchers developed a wax-assisted exfoliation method to fabricate high-quality MnBi2Te4 devices with dual-surface AlOx encapsulation. This approach significantly improved the robustness of topological phases in MnBi2Te4, leading to the observation of enhanced axion insulator states and quantum anomalous Hall effects.
Researchers observe anomalous topological pumping in hyperbolic lattices with constant negative curvature. The ground-state band carries topological invariants equivalent to 8D quantum Hall physics, enabling quantized transport velocities matching predictions for eight-dimensional systems.
Researchers at Mainz University have observed the transition of a two-dimensional ordered lattice structure into a disordered state in real time using skyrmions. The two-step melting process involves the loss of translational and orientation order, leading to complete dissolution of the lattice.
Researchers have pioneered new ways to apply intrinsic magnetic topological materials in spintronic devices, leading to breakthroughs in storage technology. The team discovered that asymmetric topological surfaces can generate persistent spin currents, allowing for efficient electric switching approaches.
Researchers have developed a new type of exotic quantum material that can maintain its quantum properties when exposed to external disturbances, paving the way for robust quantum computers. The breakthrough uses magnetism to create stability, making it an important step towards realising practical topological quantum computing.
Researchers have identified promising material platforms and pathways to create Z3 parafermions, enabling Fibonacci anyonic statistics and universal topological quantum computation. High-filling states and coupling FQAHE with superconductivity are potential approaches.
Researchers at Peking University have reported the first observation of non-reciprocal Coulomb drag in Chern insulators, revealing new insights into topological quantum materials and quantum fluctuations. The study enhances our understanding of quantum states in magnetic topological systems.
Researchers at Columbia University have discovered over a dozen new quantum states in twisted molybdenum ditelluride, which can be created without an external magnet. These states hold promise for building topological quantum computers with unique properties that could reduce errors and improve performance.
Recent study on 2M-WS2 reveals coexistence of striped surface charge order with superconductivity, modifying spatial distribution of Majorana bound states. Experimental results demonstrate that surface charge order does not destroy bulk topology but can modify MBS positions.
Researchers found dramatically enhanced heat oscillations in ZrTe₅ under strong magnetic fields and low temperatures, attributed to a novel mechanism involving electron-phonon interactions. This phenomenon is counterintuitive and has significant implications for understanding quantum transport in semimetals.
Physicists at the University of Cologne have successfully observed Crossed Andreev Reflection in TI nanowires, a crucial step toward engineering Majorana-based qubits. This breakthrough enables reliable control over superconducting correlations in topological insulator nanowires.
The study reveals the existence of valley vortex states within water wave crystals, introducing a new degree of freedom for water wave manipulation. These states have significant implications for ocean energy extraction, marine engineering, and coastal infrastructures.
A new framework for understanding complex systems has been introduced by a groundbreaking study led by Professor Ginestra Bianconi from Queen Mary University of London. The study establishes the field of higher-order topological dynamics and reveals how hidden geometry shapes brain activity, climate patterns, and artificial intelligence.
A team of scientists has experimentally generated various topological structures in water waves, including skyrmions, merons, Möbius strips, and vortices with different topological charges. These findings have the potential to revolutionize microfluidics and biomedical engineering.
Researchers have discovered a unique configuration of twisted bilayer-trilayer graphene that forms a perfectly ordered array of electrons, resulting in a topological electronic crystal. This phenomenon enables effortless electric current flow along the edges while maintaining insulating properties within the interior.
Scientists have successfully created nanoislands on silicon that can be controlled by an external electric field. These nanoislands exhibit swirling polar textures with promise for future applications in ultra-high-density data storage and energy-efficient transistors.
Researchers have found a quantized planar Hall plateau in magnetic Weyl semimetals, which is determined by the Chern number and energy tilt of the Weyl points. This discovery provides new insights into the relationship between the Hall effect and global topological quantities.
Thomas Nikolaus has received the €10,000 von Kaven Award for his groundbreaking work on homotopy theory and K-theory. His research has revolutionized the theory of topological cyclic homology and made significant advances in quadratic forms over general rings.
This editorial introduces persistence landscapes as a mathematical method to identify and correct biases in medical imaging. Persistence landscapes offer a way to reduce random noise while preserving important details, making it easier for clinicians to focus on meaningful image parts.
Researchers introduce a new tool called 'persistence images' that uncovers hidden biases in medical imaging data, advancing fairness in healthcare AI. The technology helps detect bias, filter out noise, and improve overall accuracy, leading to more reliable diagnoses and better patient outcomes.
A new approach using topological data analysis (TDA) enhances the reliability and reduces bias in AI systems used for medical diagnosis in radiology. TDA captures intricate features and provides a holistic view of medical images, leading to more accurate diagnoses and equitable patient care.
The comprehensive review highlights the impact of electron density topology on materials science and chemistry. It reveals connections between methods, including NG QTAIM, and their potential for simulating complex reactions, enabling more realistic computing and understanding of matter.
A novel capacitorless solid-state power filter (SSPF) has been developed for single-phase DC-AC converters, eliminating the need for LC filters and dc-link capacitors. The proposed concept demonstrates a significant reduction in critical components, leading to enhanced efficiency and reliability.
Scientists have created a method to switch between optical pulling and pushing forces by altering the shape of Fermi arcs in topological photonic Weyl systems. This approach enables a stable optical pulling force effective across various particle types, regardless of size, shape, or refractive index.
Researchers have found that variability in when and how cells divide during embryo development leads to more optimal arrangements of cells, promoting robust tissue formation. This study challenges traditional views on the role of cell division variability in embryonic development.
Researchers at the Max Planck Institute have made a groundbreaking discovery in chiral materials, enabling the creation of orbital electronics. The study reveals that certain materials naturally possess orbital angular momentum monopoles, which can be harnessed for memory devices and other applications.
Researchers have discovered chiral topological semi-metals that possess properties making them suitable for generating currents of orbital angular momentum (OAM) flows. This breakthrough paves the way for the development of energy-efficient devices in orbitronics, a potential alternative to traditional electronics.
A recent study has lifted the veil of topological censorship by revealing a meandering conduction channel that can carry quantized bulk current. The researchers identified mechanisms that allow for tuning between qualitatively different microscopic implementations, challenging traditional theories.
Scientists at Aalto University and Institute of Physics CAS built an artificial quantum material with topological quantum magnetism, featuring a new state of matter. The researchers demonstrated the highest-order topological quantum magnet, which could provide substantial protection against decoherence in quantum technology.
Researchers predict the existence of a new type of exciton with finite vorticity, called a 'topological exciton,' in Chern insulators. This prediction has the potential to enable the development of novel optoelectronic devices for quantum computing.
An international team has discovered 3D quantum spin liquids in Nickel Langbeinites, a new class of materials. The discovery was made using neutron experiments and theoretical modelling, which revealed an island of liquidity at the centre of a strongly frustrated lattice.
Researchers confirm Kagome superconductor, a class of materials with star-shaped structure exhibiting unique electronic, magnetic, and superconducting properties. The discovery enables novel electronic components, such as superconducting diodes, with potential for energy-efficient quantum devices.
A team of experimental physicists has achieved a breakthrough in topological quantum computing by inducing superconducting effects in edge-only materials. This discovery could lead to the development of stable and efficient quantum computers, with potential applications in fields like quantum computing and technological advancements.
Scientists have discovered unique periodic structures in manganese germanide that behave like magnetic monopoles and antimonopoles. The researchers studied the collective excitation modes of these structures, revealing a way to experimentally determine their spatial configuration.