Articles tagged with Quantum Mechanics
Researchers developed a novel approach to solve difficult computational problems using statistical mechanics and reversible logic gates, avoiding phase transitions that slow down the process. The vertex model can be applied to machine learning, circuit optimization, and other major computational challenges.
Researchers have developed a new theoretical framework to identify computations that occupy the 'quantum frontier', the boundary between problems solvable by classical and quantum computers. The study shows that these computations can be performed with near-term, intermediate quantum computers.
Researchers have tested an alternative version of quantum mechanics that uses hyper-complex numbers, predicting new effects and commutation properties. The study found no need for these alternative rules to describe the experiment, but emphasizes the need for further testing.
Researchers have developed a way to program randomness into quantum circuits, paving the way for a boson sampler and potentially a quantum computer. The breakthrough, led by Dr Nick Russell's work, solves a key problem in quantum computing and offers a significant milestone in the field.
Researchers developed a miniature tripler that generates UV pulses with high efficiency and miniaturization, overcoming previous limitations. The device uses software optimization to achieve a factor of three increase in efficiency.
Researchers from Canadian and international institutions discuss the impact of microbes on human health, disease, and society, as well as the neural basis of emotional memories. They also explore quantum computing and its potential to revolutionize cybersecurity.
Researchers at the University of Ottawa have developed a high-dimensional quantum cloning machine that can intercept secure quantum messages. By analyzing the results, they discovered clues to protect quantum computing networks from potential hacking threats.
Researchers mapped over 23,000 individual atoms in an iron-platinum nanoparticle to reveal the material's defects and properties. The study reveals unique arrangements of atoms at grain boundaries, which significantly influence material properties.
Scientists at the University of Sussex have invented a new method to build large-scale quantum computers using voltages on microchips, rather than aligning laser beams. This breakthrough enables the construction of universal quantum computers with potentially revolutionary applications in fields like materials science and medicine.
A team of researchers has developed a new type of quantum heat engine photocell that can regulate solar power conversion without active feedback or adaptive control mechanisms. This design is inspired by the natural regulation of energy flow in photosynthetic green plants, and could lead to more efficient and cost-effective solar cells.
Carl M. Bender was awarded the 2017 Dannie Heineman Prize for Mathematical Physics for his development of PT symmetry theory in quantum systems. This theory has generated profound new mathematics and impacted broad areas of experimental physics, inspiring generations of mathematical physicists.
A team of scientists has determined a more precise version of the second law of thermodynamics and applied it to small quantum systems. The study found that violations of the law are rare, but can occur with significant probability in small quantum objects.
Argonne researchers posit way to locally circumvent Second Law of Thermodynamics, predicting conditions under which entropy might decrease on the microscopic level, potentially enabling a local quantum perpetual motion machine.
A team of researchers at the University of Warsaw has developed a bioinspired micro-robot capable of mimicking caterpillar gaits in natural scale. The robot harvests energy from green light and can travel on flat surfaces, climb slopes, squeeze through narrow slits, and transport loads.
The study proposes an occupancy frequency approach to select representative configurations for reaction mechanism calculations, reducing the number of QM calculations required in hybrid simulations. This method focuses on average structure configurations, enabling a powerful tool for multiscale simulations.
NIST's N4 watt balance conducts its first measurement of Planck's constant, achieving accuracy of 34 parts per billion. This result is consistent with other countries' measurements and sets the stage for a new kilogram definition by 2018.
Researchers have observed experimental indication of a phenomenon where superconductors, lasers, and Bose-Einstein condensates coexist. By combining experiments with theoretical models, they found that high-energy side-peak emission may originate from strongly bound electron-hole pairs persisting in an optical cavity.
Professor Jim Al-Khalili has received the first-ever Stephen Hawking Medal for his work in promoting public awareness of science through various disciplines. The medal recognizes his efforts to communicate complex physics concepts through documentaries and broadcasting.
Victor Flambaum's appointment at the Helmholtz Institute Mainz is expected to give great impetus to the development of the PRISMA Cluster of Excellence. He will be collaborating with various departments, including experimental groups working on dark matter and antimatter research.
Researchers created a nanoscale drum using graphene to manipulate vibrations with high tunability and controllable coupling between modes. This enabled the creation of new notes and amplification of vibrations, opening doors to probing fundamental physics and improving sensor sensitivity.
Researchers at Colorado State University have discovered a new way to produce electron spin currents using non-polarized light, a potential game-changer for microelectronics. This achievement could lead to more efficient and powerful devices with reduced power consumption.
Researchers from over 30 universities compared quantum simulation codes, achieving more precise results than previous calculations. The study defines a quality criterion to verify future software developments and contributes to higher standards for materials property simulations.
Researchers create single-particle engine that can store and generate energy, operating at 0.3% efficiency with a power output of 10^-22 watts. The device has potential applications in quantum thermodynamics and nano engineering.
Researchers at Aalto University have made a groundbreaking discovery in heat transport, enabling efficient cooling of quantum processors and paving the way for faster and more reliable quantum computing. The innovation uses photons to transfer heat over long distances, surpassing previous limitations.
A team at Osaka University has successfully demonstrated experimental evidence and theoretical calculations to show that Coulomb blockade occurs on two-dimensional organic conducting polymer films. This breakthrough could revolutionize our understanding and design properties of organic and molecular devices.
Two University of Rochester scientists discovered the 17th century Wallis formula for pi in a quantum mechanics formula for hydrogen atom energy states. The discovery underscores pi's omnipresence in math and science.
Vyjayanthi Chari, a professor at UC Riverside, is recognized as a Fellow of the American Mathematical Society for her contributions to the theory of quantum groups and affine Lie algebras. She has also made significant contributions to mentoring graduate students and postdocs.
Researchers have pushed boundaries to establish new limits in science, from growing carbon nanotubes with exceptional reflectivity to studying extremophiles like Deinococcus radiodurans. These discoveries highlight the importance of exploring extremes and advancing our understanding of physics.
Engineered viruses were used by MIT researchers to achieve a significant efficiency boost in a light-harvesting system, utilizing quantum effects to enhance exciton transport. The team successfully more than doubled the speed of excitons, increasing the distance they traveled before dissipating.
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 team of scientists at the University of the Basque Country has successfully simulated actions that contradict the fundamental laws of quantum physics in a laboratory setting. Using trapped atoms, they have reproduced symmetry operations previously thought to be impossible in the atomic world.
Scientists from India developed a theory governing curved graphene using a quantum simulator based on an optical lattice. The findings could lead to novel graphene-based sensors with controlled deformation.
Physicists have developed a radical new theory that confines electromagnetic energy without leaking away, with potential applications in explaining dark matter and combating energy losses. The theory contradicts fundamental principles of electrodynamics but could lead to breakthroughs in quantum computers and laser technology.
Scientists have successfully simulated significant parts of the LHC-II molecule using supercomputers, proving that theories align with reality. This breakthrough enables understanding of reactions during early stages of photosynthesis for the first time.
Physicists suggest detecting dark matter through radiation signals created by particle collisions, increasing chances of detection in underground detectors and specific areas in space. The current satellite-based experiments may have been searching for the wrong signals.
A team of researchers developed an artificial model system to study quantum effects in light harvesting, revealing a delicate interplay between molecular vibrations and electrons. The resulting theoretical model explains experiments perfectly, shedding light on the physical mechanisms necessary for energy-efficient photovoltaic cells.
Physicists have successfully frozen single charged atoms to within a millionth of absolute zero using microwave radiation, paving the way for simplified construction of quantum technology devices. This technique will enable the creation of powerful quantum sensors, ultra-fast quantum computers, and ultra-stable quantum clocks.
A new calculation method developed by a UCL-led team of scientists can accurately predict how much radiation carbon dioxide absorbs, reducing uncertainties in climate change modeling and enabling more accurate predictions about Earth's warming over the next few decades. The improved accuracy will enable missions to achieve their goals.
Columbia University researchers develop a new technique to create single-molecule diodes, outperforming previous designs by 50 times. The breakthrough enables high current flow and rectification ratios, paving the way for nanoscale devices with real-world technological applications.
The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has received $14.5 million in NSF funding to create a Physics Frontiers Center to detect low-frequency gravitational waves using millisecond pulsars as a detection tool.
A research group at Aarhus University developed a computer game called Quantum Moves, played 400,000 times by ordinary people, providing unique insight into the human brain's ability to solve problems. The results show females outperform males in solving problems, highlighting an unexploited capacity for ingenuity in the human brain.
Researchers have found that birds can sense the earth's magnetic field and use it to orient themselves. The cryptochrome protein is thought to play a key role in this process.
A Florida State University researcher developed a theory to explain why certain materials behave, using quantum simulations and statistical methods. The study provides confidence levels in material predictions, enabling faster engineering design.
Researchers developed a new model describing atomic nuclei that better predict exotic isotope properties. This improvement enables simulations of supernova explosions and nuclear reactor processes.
A panel of quantum experts will share their insights on the origins, achievements and long-term predictions of quantum research. The discussion aims to explore transformational opportunities of quantum information technologies.
Researchers have developed a new method for authenticating physical keys using quantum mechanics, making it impossible to spoof or copy. This 'Quantum-Secure Authentication' uses the unique properties of light to create a secure question-and-answer exchange.
Researchers at UC San Diego have developed a more efficient method to trap light by harnessing bound states in the continuum. This innovation addresses the major challenge of trapping and utilizing light for optical computing circuits.
A novel ultrafast quantum chemical method called FMO-DFTB enables rapid simulations of complex molecular systems, achieving a huge improvement over traditional methods. The method has successfully evaluated large molecules including polypeptides, DNA segments, small proteins, and fullerite surfaces.
Researchers Jan Boeyens and Francis Thackeray found a connection between the Golden Ratio, space-time, and a biological species constant. The study suggests that concepts associated with relativity and quantum mechanics can be integrated through the number 1.618.
A £120 million investment will fuel the development of secure communication technologies, leveraging quantum physics to transform data security and transactions. The Quantum Communications Hub brings together world-leading researchers from top UK universities, with potential applications in healthcare, communications, and security.
Researchers discovered graphene's ability to rectify electric current using artificial triangular holes, offering a new approach for security screening detectors. The study provides an analytical framework for estimating the ratchet effect, which could lead to terahertz radiation detection.
Researchers found a surprising regularity in human behavior using quantum theory to analyze survey questions. The study identified 'quantum question equality,' where people switch their responses systematically when the order of questions is reversed.
Researchers at Washington State University have confirmed a 60-year-old prediction of atomic behavior using a super-cold cloud of atoms. This discovery opens a new experimental path to potentially powerful quantum computing by inducing coherent 'superradiant' behavior predicted by Robert Dicke in 1954.
Researchers at the University of Glasgow discovered that proteins like lysozyme can vibrate at frequencies similar to a few terahertz, allowing for efficient biochemical reactions. This 'ringing' motion enables proteins to morph quickly and bind with other molecules, critical for life's biological functions.
Researchers investigate quantum fluids and their chaotic motion at near-zero temperatures. The study aims to unlock the mysteries of this phenomenon, which has significant implications for daily life and galactic magnetic fields.
Researchers at the University of Bristol have developed a scheme to enable quantum cryptography on mobile phones, using photons as information carriers. This breakthrough technology has the potential to make secure communication available to the general public.
Senior lecturer Felicity Mellor highlights the role of silence in physics history, citing Newton's isolated work and Heisenberg's retreat to Heligoland. She questions whether modern-day scientists have control over communication levels, arguing that a balance between silence and collaboration is key.
Researchers at SDSC developed software for multi-scale QM/MM simulations, expanding types of simulations that scientists can use to design new drugs and chemicals. The software integrates with AMBER molecular simulation package, reaching a large user base.
Researchers at MIT predict the existence of six new types of topological insulators with unusual properties, which may provide insights into quantum physics. The team's analysis reveals that these materials' physical properties can be identified unambiguously in a lab.
Scientists demonstrated a breakthrough in quantum cryptography, enabling perfectly secure data transmission between two sites for up to fifteen milliseconds. This achievement marks the first step towards impregnable information networks controlled by Einstein's relativity and quantum theory.