Articles tagged with Quantum Mechanics
Researchers at Heinrich-Heine University Duesseldorf have measured the wave-like vibration of atomic nuclei with record-breaking precision, confirming the accuracy of quantum theory. The study also explores the possibility of a new fundamental force between protons and deuterons in connection with Dark Matter.
Researchers at UB discovered a new approach to understand insulator-to-metal transitions, resolving discrepancies with the Landau-Zener formula. The study's 'quantum avalanche' theory explains how electrons can flow between bands in an insulator, providing clarity on the phenomenon.
Scientists have developed a new technique to cool membranes with lasers, achieving temperatures close to absolute zero without measurement. The method uses a coherent feedback loop, where laser light acts as both sensor and damper, to dampen thermal vibrations and reach extremely low temperatures.
Researchers used coherence maps to study quantum mechanisms in photosynthesis, revealing energy transfer pathways and a clear explanation for the process. The technique gave important insights into one of biology's great mysteries.
Researchers have developed a new method for designing metasurfaces using photonic Dirac waveguides, enabling the creation of binary spin-like structures of light. This advances the field of meta-optics and opens opportunities for integrated quantum photonics and data storage systems.
Complex systems rely on vast information storage and prediction accuracy. Researchers propose using quantum technologies to mitigate trade-offs between memory cost and predictive accuracy. Quantum models can simulate processes with just one qubit of memory, offering substantially reduced memory requirements.
Researchers at Aalto University create a new bolometer that can accurately measure microwave power down to the femtowatt level at ultra-low temperatures. This breakthrough device has the potential to significantly advance quantum computing and technology, enabling more precise control over qubits and improving overall performance.
Researchers aim to understand and utilize quasiparticles called excitons, which can transport energy without a net electric charge. The goal is to design energy-efficient systems that detect and emit light across a wide range of frequencies.
Researchers at the Polish Academy of Sciences propose that Higgs boson decays into exotic particles may be detectable in future lepton accelerators like CLIC and FCC. The detection would rely on observing jets of particles produced by quark-antiquark pairs, with characteristic shifts from the axis of the colliding beams.
New experiments with ultra-cold atomic gases show that quantum systems composed of many particles change over time following a sudden energy influx. The findings reveal a universality in the behavior of these systems, shedding light on how they evolve and interact.
A team of researchers has performed a loophole-free Bell test using superconducting circuits, confirming that quantum mechanics predicts non-local correlations. The experiment demonstrates that entangled particles can be correlated over large distances, opening up possibilities for distributed quantum computing and quantum cryptography.
Researcher Junjie Yang is investigating complex atomic vibrations in hafnia-based crystals to unlock the material's potential for designing less power-hungry computers. The project aims to characterize how atoms vibrate, which plays a crucial role in ferroelectricity, and could aid the synthesis of new ferroelectric quantum materials.
Researchers propose a new bonding theory that illustrates how each boron atom satisfies the octet rule and how alternating σ bonds further stabilize the 2D sheet. The theory introduces a new form of resonance, allowing delocalization of σ electrons within the plane.
A team of researchers has achieved unparalleled precision in measuring the time delay between two photons using frequency-resolving sampling measurements. This breakthrough enables faster and more efficient characterisation of nanostructures, including biological samples and nanomaterial surfaces.
Researchers at Chalmers University have successfully used a quantum computer to calculate the intrinsic energy of small molecules, demonstrating a new method called Reference-State Error Mitigation. This breakthrough has the potential to advance the boundaries of chemical calculations and simulate complex chemical processes.
The team successfully entangled two qudits with unprecedented performance, enabling faster and more robust quantum computing. This breakthrough could lead to significant advancements in fields like chemistry and physics.
Researchers have discovered a new phase of matter where a quantum liquid becomes solid when heated. The breakthrough was achieved through a collaboration between experimentalists and theoretical physicists, who developed a model that explains the formation of a quantum crystal at finite temperatures.
Researchers observed quantum interference effect in inter-layer Coulomb drag for the first time, revealing significant deviations from classical drag resistance. The discovery relies on superimposing inter-layer diffusion paths and impurity potential scatterings from intermediate insulating layers.
Scientists at TU Wien have developed a technique to control the shape and size of nano gold structures using highly charged ions. The experiment shows that the impact force is not the decisive factor, but rather the electrical charge of the ions, which deposits energy at the point of impact and disrupts the crystal structure of the gold.
Researchers developed a novel design for the chip using a crossbar layout, outperforming state-of-the-art photonic counterparts in terms of scalability and technical versatility. The synergy of powerful photonics with the novel crossbar architecture enables next generation neuromorphic computing engines.
Researchers at Rutgers University have made significant breakthroughs in understanding the electrical properties of Y-ball, a mysterious 'strange metal'. The study reveals unusual fluctuations in the material's charge and provides new insights into its behavior, which could pave the way for next-generation quantum technologies.
Researchers at Tokyo University of Science used computer simulations to clarify why L-alanine was preferred over D-alanine during primordial RNA aminoacylation reactions. The study revealed that L-amino acid had more electrostatic stability in its transition state, providing a plausible reason for the selective aminoacylation.
A team from UNIGE and ID Quantique has developed single-photon detectors that can generate secret keys at a rate of 64 megabits per second, overcoming current limitations. This innovation enables ultra-secure data transfer for banks, healthcare systems, governments, and the military.
Researchers developed a technique to predict how quantum systems behave when connected to their environment, turning a problem into a solution. The approach combines techniques from quantum many-body physics and non-Hermitian quantum physics, providing a crucial tool for real-world applications of quantum technology.
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.
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.
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.
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.
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.
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.
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.