Articles tagged with Quantum Mechanics
Researchers have discovered a 'quantum leap' in graphene's electronic properties, enhancing electron-on-electron interaction. This breakthrough could accelerate research on devices like touch-screens and ultrafast transistors.
Stenger examines the concept of fine-tuning in physics and cosmology, arguing that many claims by theists are based on misunderstanding science. He finds evidence beyond a reasonable doubt that God does not exist, exploring standard models of physics and cosmology to support his argument.
Physicists at UCLA found that dividing space into discrete locations like a chessboard explains how point-like electrons manage to carry their intrinsic angular momentum. This concept, inspired by graphene's electronic properties, proposes that space at very small distances is segmented, rather than smooth.
A team from Vienna and Munich has developed a numerical solver to predict the design-limited damping of mechanical resonators, enabling the creation of more efficient devices. The solver uses quantum mechanics to calculate the radiation of phonons from the resonator, removing the need for trial and error prototype fabrication.
Researchers have successfully performed energy-state occupancy readouts of artificial atoms using common computer interfaces, enabling the creation of quantum mechanical charge carriers. This breakthrough brings the technology one step closer to practical applications.
A Columbia University engineering team has discovered how pure graphene breaks under tensile stress, revealing a novel soft-mode phonon instability that leads to mechanical failure. This finding is significant for understanding the behavior of low-dimensional systems like graphene and could lead to new ways to engineer its properties.
Researchers have developed a model that confirms correlation between on and off periods in blinking phenomena, providing insights into the physical mechanism behind the vast range of emission times. The finding has potential applications in quantum dot imaging, cancer cell detection, and display screen development.
A team of researchers led by Pitt's Jeremy Levy will combine semiconductor and superconducting materials to create a single material for quantum computers, tackling challenges like information loss and quantum simulation. The $7.5 million MURI award aims to accelerate research and application development.
Recent research challenges previous observations of supersolid helium, proposing that the phenomenon may be caused by quantum plasticity. The study's findings have significant implications for our understanding of ultracold solid helium and its potential to exhibit counterintuitive characteristics.
Researchers create powerful new tool for calculating Casimir forces, allowing repulsion in microelectromechanical systems. This breakthrough could significantly reduce the failure rate of existing MEMS devices and enable affordable, new technologies.
Scientists used quantum mechanics to simulate silica behavior under high-temperature and pressure conditions, revealing the mineral's structure changes dramatically with depth. The study suggests the lower mantle may be devoid of silica, except in localized areas where oceanic plates have subducted.
Tetrahedral dice pack 76% of container space, surpassing sphere packing, and single molecules can calculate thousands of times faster than PCs.
Researchers at Ohio University and the University of Hamburg captured the first images of atomic spin in a study published in Nature Nanotechnology. The discovery enables manipulation of spin direction to store data in nanoscale devices, potentially leading to faster, smaller, and more efficient computers.
Researchers are gaining insight into the workings of magnetic shape-memory materials by studying their molecular level behavior. By examining the effects of excess manganese atoms on a specific alloy, scientists hope to develop materials that exhibit larger changes in shape.
Theoretical physicist Nikodem Poplawski proposes that our universe could be born from the interior of an Einstein-Rosen bridge (wormhole) within a black hole, potentially resolving issues with the Big Bang theory and black hole information loss. This model may also explain cosmic inflation.
Researchers Sang-Wook Cheong and Daniel Friedan receive American Physical Society prizes for their work on multiferroics and critical phenomena, respectively. Their discoveries have potential applications in semiconductor electronics, solar cells, and data storage.
Researchers at Uppsala University shed light on ribosome function by detailing chemical reaction mechanisms, identifying key role of water molecules in catalysis. The findings suggest a few components induce the catalytic effect, with surrounding structure holding them in place.
Using ultracold atoms, Rice physicists confirmed a theory about a universal quantum mechanism that allows trimers to form in special cases where pairs cannot. The team observed Efimov's trimers appear and reappear repeatedly in a stepwise fashion.
Researchers at Argonne National Laboratory are developing a way to control the Casimir force, which attracts objects at the nanoscale. The goal is to limit its attractive properties and make it repulsive, enabling frictionless motion through nanolevitation for novel NEMS devices.
A new class of materials may allow nanoscale machines to overcome mechanical friction by harnessing a quantum phenomenon known as the Casimir effect. Chiral metamaterials have been found to exert a repulsive force when placed in close proximity, enabling potential applications in industry, energy, and medicine.
Researchers created the first atomic-scale maps of quantum dots, providing detailed information about their structure and chemical makeup. This breakthrough enables controlled fabrication and manipulation of quantum dots for various applications in computing, energy and technology.
A team of researchers has discovered a compact way to produce infrared light using a miniscule tunnel in a stack of gold and silica layers. This tiny, tunable light source could be the precursor to a new component for light-based chips. String theorists have also developed a toolkit of equations to measure the predictions of string the...
Researchers used VLBA system to measure bending of starlight by gravity, achieving precision of one part in 30,000. The accurate measurement brings scientists closer to uniting General Relativity and quantum theory.
Physicists at UCLA have created the world's smallest incandescent lamp, utilizing a single carbon nanotube filament that is only 100 atoms wide. The tiny lamp can study black-body radiation and its structure was imaged using an electron microscope with atomic resolution.
Researchers at Carnegie Mellon University have established evidence of a liquid-liquid phase transition in supercooled silicon, revealing two distinct forms of liquid silicon with unique properties. This breakthrough uses rigorous computer calculations and quantum mechanics to gain a better understanding of materials behavior.
A research team has successfully observed the quantum spin Hall effect, where electrons flow without external stimulus due to internal material structure. This breakthrough could lead to the development of fault-tolerant quantum computers and spin sources suitable for quantum computing and information processing.
Researchers discovered that nanoscale lead atoms on silicon exhibit a fluid-like motion, enabling the formation of uniform-height islands in minutes. The unique behavior suggests that quantum mechanics governs the growth process, allowing for rapid self-assembly and potentially simplifying material properties manipulation.
The Compact Light Source has achieved three key milestones: first scientific publication, micro-tomographic images, and protein crystallography data set. These results demonstrate its potential to transform biomedical research with high-intensity, tunable x-ray beams.
Soundararajan and Roman Holowinsky prove a significant version of the quantum unique ergodicity (QUE) conjecture using different techniques from number theory. Their work shows that for certain shapes associated with number theory, waves always spread out evenly, eliminating whispering galleries.
Researchers have discovered a way to make magnetic sensors capable of operating at high temperatures, overcoming the limitations of conventional sensors. By introducing slight degradation or impurities into indium antimonide samples, scientists can recreate the effect that was previously observed only at low temperatures.
Researchers from Princeton University have discovered that electrons in bismuth display a highly unusual pattern of behavior under a powerful magnetic field at ultra-low temperatures. This phenomenon, known as a collective state, is a manifestation of quantum mechanics and could lead to new paradigms in computing and electronics.
Researchers at the University of Florida have successfully reduced the Casimir force by altering the surface of metal plates, which could help mitigate stiction in microelectromechanical devices. The findings could pave the way for further miniaturization and potentially impact various consumer products.
Researchers found that mantis shrimp can see colours from ultraviolet to infrared and measure four linear and two circular polarisations, enabling them to detect subtle changes in light. This unique talent presents a new concept of polarisation vision, allowing shrimps to navigate and find food more effectively.
Researchers have successfully fired photons back and forth between a space satellite and a ground-based station, demonstrating the possibility of a secure quantum communication channel. The achievement marks an important step towards global communication via satellites using quantum mechanics.
Researchers found that electrons in graphene behave like quantum billiard balls, with wave-like properties and interference patterns. The discovery could lead to new applications such as ballistic transistors and resonant cavities for electrons.
Physicists Tanmay Vachaspati, Dejan Stojkovic, and Lawrence M. Krauss propose a solution to the long-standing problem of information loss in black holes. They suggest that non-thermal radiation can carry information about collapsing matter beyond the event horizon.
Researchers at the University of Delaware have developed a new method to simulate the hidden properties of water, resolving long-standing ambiguities in its structure and behavior. The study uses quantum mechanics to predict the properties of liquid water, opening up new avenues for understanding its applications in various fields.
Researchers at Rensselaer Polytechnic Institute have developed a powerful computer model to explain the mechanism of an intein, a type of protein that cuts itself out of host proteins. The study uses quantum mechanics to reveal new insights into the reaction's behavior and potential applications in nanotechnology.
Researchers at the University of Utah have demonstrated a way to read data stored in the magnetic spins of phosphorus atoms, a major obstacle for building a particular kind of quantum computer. This breakthrough could lead to the development of superfast computers based on quantum physics.
Researchers at Bar-Ilan University have identified a class of polyprismane molecules that exhibit auxetic behavior, getting thicker when stretched and thinner when compressed. This discovery has potential applications in bulletproof vests and medical technology.
Physicist Andrei Lebed has discovered exotic superconductivity where electron pairs exhibit both rotating and non-rotating behavior, breaking down conventional symmetry laws. This phenomenon is observed in strong magnetic fields and has significant implications for our understanding of quantum mechanics.
Charles Townes, the father of quantum electronics, receives the award for his work on masers and lasers, while Raj Reddy is recognized for transforming computer science through robotics and human-computer interaction. Their awards mark the nation's appreciation for their statesmanship in science.
Researchers at NIST have achieved a new record in quantum calculation precision, simulating the hydrogen molecule to an unprecedented level of accuracy. By merging two earlier algorithms and utilizing parallel processing, they were able to reach an accuracy of 1 part in 100 billion, outperforming previous experimental values.
Physicists at Rutgers University have rewritten the classical understanding of quantum statistical physics by finding a simpler way to derive a mathematical formula. The discovery, published in Physical Review Letters, could lead to rewrites of tomorrow's physics textbooks.
Pitt researchers create tiny semiconductor islands that can confine individual electrons, a crucial step towards building a quantum computer. The achievement demonstrates the potential of nanotechnology in advancing quantum computing.
Researchers at UC Santa Barbara have successfully detected and studied 'dark' spins in diamond, a significant breakthrough in the development of room temperature quantum computing. The discovery could enable networks of spins to process information at the atomic level.
Penn physicists develop artificial solids from nanoscale crystals, enabling controlled changes in electrical properties. Their findings promise the creation of functional nanocrystal-based devices and circuits with potential applications in electronics.
Scientists at NIST confirm improved accuracy of 'watt balance' method, reducing measurement uncertainty by about 40 percent, moving closer to redefining the kilogram in terms of basic properties of nature.
Researchers at Perimeter Institute outline a new aspect of Quantum Cryptography, improving the security of data transmission. The study demonstrates enhanced capabilities in quantum key distribution, paving the way for widespread adoption in secure communication networks.
Martin Klein received the Pais Award for his groundbreaking research on the history of 19th and 20th century physics, which have profoundly influenced generations of historians. He also made significant contributions to the history of relativity and quantum physics.
Researchers have created an 'egg carton' of light with tiny holes that can contain single atoms, a crucial step towards making quantum computing more practical. The design enables faster computing than traditional chips and has potential applications in fields like astrophysics, genetics, and materials science.
Researchers at Northwestern University show that a magnetic field can be used to increase or decrease the flow of heat through an Andreev interferometer. The findings, published in Physical Review Letters, demonstrate the quantum mechanical nature of heat flow and its relationship with electron charge.
Researchers dust off dusty shelf by applying Hanbury Brown-Twiss Interferometry to high-energy gold nucleus collisions, reconciling experimental data with theoretical expectations. They found that pions in the plasma have a low mass inside but a higher mass outside, helping create quark-gluon plasma conditions similar to those just aft...
The Einstein@Home project enlists thousands of home computers to analyze data from LIGO and GEO-600 detectors, searching for subtle ripples in space-time predicted by Einstein's General Theory of Relativity. By involving hundreds of thousands of people, the project aims to discover gravitational waves and validate theoretical physics.
The Einstein@Home project searches data from US and European gravitational wave detectors for signals from rapidly rotating compact quark and neutron stars. The project utilizes an army of home computer users to analyze the data, requiring enormous computational power.
Researchers developed a nanomechanical oscillator that bridges classic and quantum physics, exhibiting macroscopic quantum behavior at gigahertz speeds. The device is the fastest of its kind, oscillating at 1.49 gigahertz, and could be used for quantum computing, further miniaturizing wireless communication devices.
The AAAS symposium features educators and authors using popular culture to make physics accessible. Chemical physicist Catherine Asaro uses romance novels infused with quantum physics, while Professor James Kakalios illustrates physics principles through superhero comics.
Scientists have found that colloidal particle clusters exhibit beautiful and unexpected symmetry, obeying a simple mathematical principle. The discovery may have implications for understanding the atomic-scale structure of liquids and the properties of matter.
Researchers at NIST's JILA have successfully paired individual potassium atoms into boson molecules, a breakthrough towards creating a quantum 'super molecule'. The technique could improve understanding of superconductivity and high-temperature superconductivity.
Daniel Crawford's research focuses on studying the structure and properties of large chiral molecules, such as amino acids, to predict experimental data. His proposed work aims to speed up the synthesis of natural products with biological importance.