Articles tagged with Quantum Mechanics
Scientists at the University of Innsbruck have successfully measured tunneling reactions in molecular chemistry, confirming a precise theoretical model. The experiment used hydrogen and deuterium isotopes to demonstrate the quantum mechanical tunnel effect in a slow ion-molecule reaction.
A new mathematical theory developed by Peter Wolynes and David Logan predicts the nature of motions in a chlorophyll molecule when it absorbs energy from sunlight. The findings suggest that there are exceptions where simple motions persist for long times, influencing processes like photosynthesis.
A new mathematical theory developed by scientists at Rice University and Oxford University can predict the nature of motions in complex quantum systems. The theory applies to any sufficiently complex quantum system and may give insights into building better quantum computers, designing solar cells, or improving battery performance.
Researchers at University of Texas at Dallas and Ohio State University identify quantum geometry as primary mechanism for superconductivity in twisted bilayer graphene. This finding paves way for designing new superconductors that can operate at higher temperatures, transforming industries such as energy transport and maglev trains.
Scientists identify quantum geometry as the key to twisted bilayer graphene's superconducting properties. The discovery reveals that electron movement slows down dramatically near the magic angle, but still allows for electricity conduction.
A review paper on quantum transport could lead to innovative materials and devices for efficient energy management at the nanoscale. The paper provides a structured overview of theoretical understanding, models, methods, and properties of quantum systems.
Researchers at MIT have observed a rare resonance in colliding ultracold molecules for the first time, shedding light on the forces that drive molecules to chemically react. The discovery could lead to new ways to steer and control certain chemical reactions using magnetic fields.
Researchers at University of Copenhagen and Ruhr University Bochum have made a groundbreaking discovery, solving a long-standing problem in quantum physics. They can now control two quantum light sources, enabling the creation of quantum mechanical entanglement, a phenomenon with sci-fi-like properties.
Physicists at the University of Innsbruck have demonstrated a new nonlinear cooling method, allowing massive objects to be cooled to nearly absolute zero. This breakthrough enables the observation of quantum effects on macroscopic objects, paving the way for highly sensitive quantum sensors.
The team isolated pairs of atoms within a 3D optical lattice to measure the strength of their mutual interaction. They confirmed a longstanding prediction that the p-wave force between particles reached its maximum theoretical limit.
A new method bridges the quantum and classical worlds, enabling interaction-free detection of microwave pulses with a superconducting circuit. This breakthrough demonstrates genuine quantum advantage using a simpler setup, with potential applications in quantum computing, optical imaging, and cryptographic key distribution.
Researchers at Argonne National Laboratory have developed a way to rotate a single molecule, europium complex, clockwise or counterclockwise on demand. This technology could lead to breakthroughs in microelectronics, quantum computing and more.
Computer simulations demonstrate that chaos plays a crucial role in the emergence of thermodynamic behavior from quantum theory. A quantum system with indistinguishable particles and a thermometer-like particle shows a temperature distribution consistent with Boltzmann's rules only when the system exhibits chaos.
Physicists at the University of Basel have experimentally demonstrated a negative correlation between the spins of paired electrons from a superconductor. The researchers used spin filters made of nanomagnets and quantum dots to achieve this, as reported in the scientific journal Nature.
Researchers at TU Wien have directly measured the fine structure constant using a thin film that rotates light polarisation, revealing an astonishing quantum jump related to this fundamental constant. This measurement provides new insights into the strength of electromagnetic interactions.
Scientists at the University of Waterloo have developed a device that generates twisted neutrons with well-defined orbital angular momentum, enabling researchers to study next-generation quantum materials. The discovery provides an additional quantized degree of freedom for characterizing complicated materials.
Researchers at NIST created grids of quantum dots to study electron behavior in complex materials. The grids provided ideal conditions for electrons to behave like waves or get trapped in individual dots.
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 at the University of Queensland have confirmed black hole quantum properties, including superposition and wildly different masses simultaneously. The study reinforces early theories by Jacob Bekenstein, postulating that black holes can only have specific mass values within certain bands or ratios.
A University of Central Florida researcher is leading a $1.25 million project to map and manipulate materials at the nanoscale. The research aims to unlock new capabilities of materials at the nanoscale, potentially leading to new catalysts and compounds applicable in quantum science, renewable energy, life sciences and sustainability.
Physicists have observed novel quantum effects in a topological insulator at room temperature, opening up new possibilities for efficient quantum technologies. This breakthrough uses bismuth-based topological materials to bypass the need for ultra-low temperatures.
Researchers at Sandia Labs have successfully built a compact, rugged quantum inertial sensor that can guide vehicles without satellites. The device uses advanced materials and integrated photonic technologies to achieve high accuracy and miniaturization.
Researchers at the University of Tokyo have identified possible solutions to limitations of qubits for quantum computing. They successfully controlled temperature and movement of trapped electrons in a vacuum using hybrid quantum systems, paving the way for potential applications in quantum technology.
Australian researchers have engineered a quantum box for polaritons in a two-dimensional material, achieving large polariton densities and a partially 'coherent' quantum state. The novel technique allows researchers to access striking collective quantum phenomena and enable ultra-energy-efficient technologies.
Researchers at the University of Colorado Boulder have discovered a novel phenomenon in a type of quantum material that can change its electrical properties under specific conditions. The material, known as Mn3Si2Te6, exhibits colossal magnetoresistance when exposed to certain magnetic fields, allowing it to behave like a metal wire.
Researchers at UC San Diego's Q-MEEN-C are exploring quantum materials for neuromorphic computing, which could lead to faster, smaller, and more energy-efficient devices. The center aims to develop brain-like networks and pattern recognition capabilities with minimal energy input.
Physicists used machine learning to compress a complex quantum problem into four equations, capturing the physics of electrons on a lattice with high accuracy. The approach could revolutionize how scientists investigate systems containing many interacting electrons and potentially aid in designing materials with sought-after properties.
Recent CERN experiments provide evidence for the existence of new particles called pentaquarks, which consist of four quarks and one antiquark. The discovery raises the possibility that a whole new class of matter is at the cusp of being discovered.
Researchers at the University of Basel have achieved a record low temperature of 220 microkelvin by cooling an electric circuit made of copper on a silicon chip using magnetic fields and an improved thermometer. This breakthrough allows for further study of quantum effects and potential applications in quantum technologies.
Researchers created silicon nanopillars using MacEtch, a wet etching technique that generates light particles at the right wavelength to proliferate in optical fibers. This breakthrough enables practical quantum communication via optical fibers.
The University of Texas at Dallas is receiving a $5 million NSF grant to advance quantum research and education. The grant aims to train the workforce needed for neutral-atom-based quantum information processing, which has immense potential to speed up computation.
Researchers from the MICROSCOPE mission presented the most precise test yet of the Weak Equivalence Principle, a key component of general relativity. They found no violation of the principle, setting the most stringent constraints on gravity and time.
Physicists have created a way to simulate quantum entanglement between interacting particles using neural networks and fictitious 'ghost' electrons. This approach enables accurate predictions of molecule behavior, which could lead to breakthroughs in pharmaceutical development and material design.
Researchers from NUS and LMU Munich successfully demonstrated device-independent QKD, a new form of quantum key distribution that is secure even if users are not privy to the underlying hardware. The experiment used a new protocol with an extra set of key-generating measurements to make it more tolerant to noise and loss.
A postdoctoral researcher uses computational tools to characterize light mesons, shedding light on the strong interaction and its role in binding quarks. The study aims to improve understanding of how matter stays together and bridge the gap between experimentalists and theorists.
Researchers at MIT and Weizmann Institute of Science visualize electron vortices in ultraclean tungsten ditelluride, confirming theoretical predictions. The observation could lead to more efficient next-generation electronics by reducing energy dissipation.
Researchers at the University of Innsbruck developed a new technique to track levitated nanoparticles with improved precision. By using the reflected light of a mirror, they outperformed state-of-the-art detection methods and opened up new possibilities for nanoparticle-based sensing applications.
Researchers at SUTD design a multiferroic van der Waals heterostructure combining magnetic and ferroelectric 2D materials, offering voltage switchable magnetism. This material can be used for ultracompact memory devices with minimal energy consumption.
Scientists at the University of Cambridge have measured the speeds of spin and charge excitations in a narrow wire, finding that they travel at fixed but different speeds. This discovery opens up new possibilities for spintronics and our understanding of quantum matter.
Physicists at Rice University have created a quantum simulator that reveals the behavior of electrons in one-dimensional wires, shedding light on spin-charge separation. The study's findings have implications for quantum computing and electronics with atom-scale wires.
Researchers at the University of Colorado Boulder and NIST have successfully demonstrated reading out signals from superconducting qubits using laser light, preserving the qubit's information. This breakthrough could enable the creation of a quantum internet, allowing for secure communication over long distances.
FeRh, a metal with antiferromagnetic and ferromagnetic phases, has its phase transition kinetics measured using ultrafast techniques. The study reveals new insights into the ultrafast dynamics of magnetic materials.
Scientists have produced identical photons originating from different sources, a crucial step towards applications like quantum computing and secure communication. The researchers achieved this by using precise electric fields to tune the energy levels of quantum dots, resulting in 93% identical photons.
Physicists confirm quark mass existence via observation of dead cone effect, a phenomenon predicting quarks with higher masses emit fewer gluons. The effect, predicted 30 years ago, involves a 'dead cone' where gluons do not appear at lower energies and larger quark masses.
University of Queensland scientists have discovered a way to make molecular switches work at room temperature, paving the way for more efficient and environmentally friendly technologies. This breakthrough could lead to advancements in MRI scans, sensors, carbon capture, and hydrogen fuel cells.
Researchers at Colorado State University have developed a cobalt-based molecule that can detect extremely subtle temperature shifts inside the body, opening up new possibilities for medical imaging and therapy. The noninvasive probe uses radiofrequency waves to read out temperature signals from the body.
Scientists at Aalto University and Oak Ridge National Laboratory develop new method to detect Cooper pairs in unconventional superconductors, enabling unique understanding of quantum materials. This breakthrough represents a major step forward in developing quantum technologies.
NIST researchers have developed a new atomic radio receiver that boosts signal strength 100-fold by enclosing cesium atoms in a custom copper structure resembling headphones. The structure acts as a split-ring resonator, enhancing the incoming radio signal and enabling the detection of weaker signals.
A team of scientists used a quantum simulator to study the behavior of a complex quantum system, finding that it exhibits characteristics similar to fluid dynamics. The research also showed that this phenomenon can be observed in the flights of bees, as well as in unusual stock market movements.
Researchers developed a technique to study supermassive black holes smaller than M87's by measuring the brightness of their shadows over time. The 'shadow' signal can reveal the size and shape of a black hole's event horizon, shedding light on gravity's nature.
Researchers at the University of Copenhagen have developed a new position-based quantum encryption method that uses a person's geographical location to guarantee secure communication. This method makes it difficult for hackers to impersonate users and exploit online communications.
Researchers studied twisted trilayer graphene, discovering a phase diagram that decouples into product states of graphene and bilayer graphene. The system exhibits unique insulating and semi-metallic phases in the presence of an electric field.
The study investigates the role of physical principles in quantum Darwinism, finding that it relies on non-classical features, specifically entanglement, to emerge via natural selection. The researchers employed generalized probabilistic theories to analyze and compare different physical theories.
Researchers discovered near-zero index materials where light's momentum becomes zero, altering fundamental processes like atomic recoil and Heisenberg's uncertainty principle. These materials could enable perfect cloaking and have potential applications in quantum computing and optics.
Researchers Francesca Ferlaino, Kathrin Thedieck and Hans Briegel will investigate new systems for quantum matter simulation, control of mTOR-dependent metabolic processes, and AI-driven quantum experiments. Their work has the potential to revolutionize fields such as physics, computer science and medicine.
Researchers have developed a key experimental device for future quantum physics-based technologies by coupling nanomechanical oscillators with qubits. This enables the manipulation of quantum states in mechanical oscillators, generating quantum mechanical effects that could empower advanced computing and precise sensing systems. The de...
Researchers at Dartmouth have built the world's first superfluid circuit using pairs of ultracold electron-like atoms, allowing for controlled exploration of exotic materials like superconductors. The circuit enables analysis of electron movement in highly controllable settings.
Researchers found that quantum error correction can distort the output of quantum sensors and lead to unphysical results due to non-commuting actions. However, they provide procedures for restoring correct results through post-processing and devising ideal sensing protocols.
The research team created silicon-based qubits using FinFET architecture that can store quantum information in two states at higher temperatures, allowing for scalability and integration into existing industry standards.
Physicists from Cracow-based Institute of Nuclear Physics found that the proton's charm structure might affect our understanding of cosmic neutrinos. Recent LHCb detector measurements support a model with a higher charm quark contribution, which could mislead astronomers about high-energy neutrino origins.