Articles tagged with Quantum Mechanics
Researchers demonstrate a new way to control quantum behavior using materials design alone by freezing molecular hydrogen in dry ice. This technique could improve energy storage for hydrogen fuel, memory for quantum computing, and measure comet temperatures in outer space.
Researchers at Goethe University Frankfurt are exploring modern quantum materials, which exhibit fascinating phenomena in response to external stimuli. Olena Fedchenko investigates electronic structure and properties of these materials using various photon sources.
A new method developed at LMU reconstructs precise energy spectra without lengthy calculations, revealing previously hidden details. This approach uses complex time evolutions to supplement time-dependent data and effectively overcomes the resolution limit, allowing finer structures to be resolved.
Researchers at MIT have discovered a mathematical connection between quantum mechanics and classical physics, enabling the description of quantum behavior using everyday classical ideas. The team's findings shed light on phenomena such as the double-slit experiment, which has long been challenging to explain using classical tools.
Researchers at Penn State have made precise calculations, showing that a discrepancy in particle physics was a fluke, not nature. The study strengthens confidence in the Standard Model to 11 decimal places, ruling out new forces or quantum objects.
Researchers introduced QCell, a curated collection of 525,000 new quantum-mechanical calculations for biomolecular fragments. The dataset addresses the limited coverage of nucleic acids, lipids, and carbohydrates, enabling reliable simulations of critical biological processes such as DNA dynamics and membrane behavior.
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.
Physicists used a water tank to simulate the Aharonov-Bohm effect, revealing counter-rotating wave patterns that mimic quantum effects. The study showed that adding a vortex causes shifts in wave phase, resulting in rotating lines of zero wave height, or nodal lines.
Researchers at MIT have developed a way to measure multiple physical quantities with solid-state quantum sensors, exploiting entanglement to overcome signal mixing. This approach enables deeper understanding of the behavior of atoms and electrons in materials and living systems, such as cancer cells.
Researchers tracked galaxy clusters to test gravity's strength, finding it weakens with distance as predicted by Newton and Einstein. The study confirms the existence of invisible dark matter, closing the door on alternative theories like Modified Newtonian Dynamics.
A team of researchers led by Kazuhiro Yamamoto has proposed a method to create a momentum-squeezed state in movable mirrors, which significantly broadens the quantum superposition of a mirror's position. This approach can amplify the signal of quantum entanglement generated by gravity, making it easier to detect.
Researchers directly imaged paired electrons causing electric current to flow without resistance at sufficiently low temperatures. The experiment revealed that the paired atoms moved in a synchronized dance, with their positions dependent on those of other pairs.
Researchers at the University of Würzburg have directly measured the 'waiting time' in a two-dimensional material, which lasts exactly 24 billionths of a second. This knowledge increases the accuracy of atomic sensors and paves the way for future medical diagnostics.
Researchers discovered a new type of topological semimetal in the heavy fermion compound CeRu₄Sn₆, stabilized by quantum criticality. The study expands the repertoire of exotic phases of matter and suggests that quantum fluctuations can act as 'nurseries' for strongly correlated topological states.
By striking a gold nanorod off-center with an electron beam, researchers created rotating circular polarization in light, a property useful for controlling information encoding and transmission. This simple approach could enable new ways to encode, route, and process information using light.
Researchers at Ohio State University have discovered a new method for controlling superconductivity by manipulating the surrounding environment. By adjusting electron interactions, they were able to switch the material's superconductivity on and off, revealing a simpler way to control atomic power behind superconductivity.
A quantum processor with nine interacting spins outperformed classical networks with thousands of nodes in realistic weather forecasting tasks. The researchers leveraged the natural dynamics of quantum systems to bypass complex circuits, achieving higher accuracy than classical reservoir models.
A University of Tokyo team developed a fluorescence imaging method to track short-lived molecular intermediates and their magnetic responses in real time. The approach isolates spin-dependent part of chemistry, revealing how magnetically sensitive intermediates appear and disappear.
Researchers at EPFL create a semiconductor-based detector that converts incoming microwave photons into measurable electrical signals, opening new perspectives for quantum microwave optics and scalable quantum information platforms. The device detects between 55%-67.7% of incoming photons with high efficiency and operates continuously.
A new laser source generates a specific type of light source called a frequency comb in the mid-infrared region, paving the way for miniaturization. The device overcomes engineering challenges to produce bright, stable, and compact frequency combs.
Researchers found that only the last few layers of a quantum circuit matter due to accumulating noise, which weakens earlier steps. This means that even deep noisy circuits can be adjusted or 'trained' for simple tasks.
A new study by FSU researchers using the John D. Fox Superconducting Linear Accelerator Laboratory showed that a long-standing explanation for magnetism in atomic nuclei does not fully work for titanium-50. The research suggests that scientists may need to rethink how they explain nuclear magnetism.
Researchers have uncovered hidden features in X-ray signals, fundamentally changing how scientists interpret them across multiple fields. The discovery enables more precise measurements and a deeper understanding of materials, from battery materials to biological proteins.
A research team at INRS has developed a simple and energy-efficient way to overcome the obstacle of detecting single photons in a sea of unwanted light. By repurposing a classical optical device, they succeeded in reorganizing light in time to highlight the useful photons without destructive amplification.
Researchers at the University of Rochester have developed a squeezed phonon laser that precisely controls individual particles of vibration or sound, allowing for accurate measurements of gravity and other forces. This technology has the potential to create more accurate, 'unjammable' navigation systems without relying on satellites.
Researchers at Hiroshima University have developed a new experimental method to demonstrate the physical delocalization of individual photons in an interferometer. The study challenges traditional interpretations of quantum mechanics and has significant implications for high-tech sensors and our understanding of reality.
Researchers successfully captured singlet-fission-amplified excitons with a molybdenum-based emitter, achieving 130% quantum yield and pushing the limits of solar cell efficiency. The team used a metal complex called 'spin-flip' emitter to harvest multiplied energy from singlet fission.
Researchers at Virginia Tech have developed a method to reduce noise in quantum computers by using a geometric approach. By adjusting the shape of a 3D space curve, they can design pulses that suppress noise errors and improve performance. This breakthrough brings us closer to large-scale quantum computing.
A study by researchers at Pohang University of Science & Technology discovered that engineered disorder can amplify transverse electron transport in magnetic materials. The findings suggest that deliberately using disorder in materials design could lead to new opportunities in spintronics and thermoelectric energy-conversion technologies.
Researchers at Rice University and the Weizmann Institute have visualized compact molecular orbitals in flat band quantum materials, providing insight into the interplay between topology and correlation physics. The study reveals that these electronic agents underlie the unusual quantum critical behavior in a highly correlated metal.
Rice University researchers have developed a new capability, magnetoARPES, to study quantum behaviors in materials like superconductors. The technique allows researchers to probe the full electronic response to a magnetic field, giving insights into collective electron behaviors.
Physicists at the University of Colorado Boulder have demonstrated a new kind of vacuum ultraviolet laser that is 100 to 1,000 times more efficient than existing technologies. The device could enable scientists to observe phenomena currently out of reach, such as following fuel molecules in real time as they undergo combustion, spottin...
The Global Physics Summit will feature over 12,000 individual presentations on new research in astrophysics, particle physics, and quantum information science. Registered journalists and public information officers will receive daily emails with information during the meeting.
Researchers discovered that carefully designed random pulses can drastically slow down unwanted heating in superconducting quantum computers, enabling complex quantum simulations. The study confirmed exotic quantum states of matter using a 78-qubit processor and explored new states of matter beyond classical computer capabilities.
Rice researchers found that cerium magnesium hexalluminate is not a quantum spin liquid, despite exhibiting characteristics of quantum spin liquid states. The material's unique ability to 'choose' between different low energy states produced observational data similar to a quantum spin liquid state.
Physicists have developed a more accurate method for estimating the impact of calculations that are not performed in high-energy particle collisions. The new approach uses perturbative calculations to reduce uncertainties present in previous simulations.
A new framework called compilation-based quantum process tomography (CQPT) has been introduced to simplify the process of determining a quantum device's behavior. CQPT uses a single measurement outcome per input state, making it more efficient and scalable than traditional methods.
Researchers investigated the role of memory in quantum systems and dynamics, discovering a process can appear memoryless from one view while retaining memory from another. The study clarifies a fundamental aspect of quantum dynamics and highlights the uniquely quantum nature of time evolution.
Researchers at TU Wien investigate the surprising effects of ion bombardment on the quantum material 1T-TaS2. They observe a clean and reliable switching behavior, where the material's state is reliably switched after each impact.
Researchers aim to harness entanglement for high-precision networking, improving measurement sensitivity and resolving finer details. The five-year effort seeks to establish ways to maintain entanglement over time, paving the way for a future quantum internet.
Researchers at Goethe University used X-ray radiation to determine the spatial structure of formic acid, finding that its atoms oscillate slightly back and forth. This 'quantum trembling' causes the molecule to lose its symmetry and become effectively three-dimensional at almost every moment.
The Harvard team developed a new microfabrication method to produce high-performance, curved optical mirrors with extremely smooth surfaces. The mirrors can control light at near-infrared wavelengths, enabling fast and efficient quantum networking.
Giant superatoms combine two quantum-mechanical constructs to suppress decoherence and create entanglement, opening opportunities for scalable and reliable quantum systems. This breakthrough enables quantum information to be protected, controlled, and distributed in new ways.
Duke University researchers have observed statistical localization in a neutral-atom platform, where most configurations of quantum bits remain effectively frozen. This phenomenon has implications for robustly storing information in a quantum system and could be a powerful feature of quantum mechanics.
Researchers Connor Thompson and Samuel Morriss share the US$30,000 prize for proposing innovative experiments on viruses and skin as test subjects for quantum biology. Their essays present novel frameworks for studying 'quantum advantage' and its applications to life's quantum foundations.
Researchers at the University of Vienna developed a novel protocol that samples only a subset of generated quantum states, enabling efficient real-time verification. The new method uses optical switches to randomly capture states, allowing for non-destructive certification and paving the way for robust quantum computing and networks.
A team of researchers led by Yoshiteru Maeno used magnetic resonance based on muons to investigate the superconducting state of strontium ruthenate. They discovered that the material exhibits spin-singlet superconductivity, which provides crucial insights into the behavior of unconventional superconductors.
Physicists have developed a way to accurately measure time in quantum events without using an external clock. The study found that the atomic-scale shape of materials influences how quickly quantum transitions unfold, with lower-symmetry structures leading to longer transition times.
The VIP-2 experiment, a highly sensitive test of the Pauli exclusion principle, found no evidence of its violation. The team set the strongest limits yet on possible violations involving electrons in atomic systems, constraining speculative theories beyond the Standard Model.
Scientists have developed a method to perform quantum operations between logical qubits while correcting for potential errors. The 'lattice surgery' technique involves splitting and merging surface-code squares to entangle two logical qubits, allowing for fault-tolerant quantum computing.
The American Physical Society's Global Physics Summit will feature over 10,000 individual presentations on new research in astrophysics and particle physics. Attendees can book discounted hotel rates near the Colorado Convention Center until February 12 to receive a discount.
Physicists have developed a new terahertz microscope that allows them to observe quantum vibrations in superconducting materials for the first time. The microscope enables researchers to study properties that could lead to room-temperature superconductors and identify materials that emit and receive terahertz radiation.
Researchers at ICFO have successfully created a supersolid state of matter by coupling ultracold potassium atoms to light, directly imaging the crystal-like structure and its oscillating spacing. The team observed stripes forming and vanishing as the cloud size expanded or shrunk, behavior related to its superfluid nature.
A team of researchers has observed the Einstein–de Haas effect in a Bose–Einstein condensate, demonstrating the transfer of angular momentum from atomic spins to fluid motion. This finding highlights the conservation of angular momentum between microscopic spin and macroscopic mechanical rotation in the quantum world.
Researchers propose a new design principle for QM/MM simulations, enabling the objective and automatic determination of the quantum-mechanical region based on electronic-state changes. This approach addresses long-standing challenges in multiscale molecular simulations, demonstrating consistent applicability across different systems.
Quantum field theories are the foundation of modern physics, but their complex nature makes them difficult to simulate on a computer. A team of researchers has developed an AI solution that can parameterize the action in these theories on a lattice, enabling more efficient simulations.
A research team has demonstrated how quantum mechanical entanglement can be used to measure several physical parameters simultaneously with increased precision. By distributing atoms into up to three spatially separated clouds, the effects of entanglement act at a distance, reducing measurement uncertainties and canceling disturbances.
A new type of optical atomic clock using ytterbium-173 ions has the potential to revolutionize timekeeping. The clock combines the high accuracy of single-ion clocks with the improved stability of multi-ion operation, making it a promising candidate for the next generation of atomic clocks.
A UC Santa Barbara professor's lab group has developed a way to use magnetic frustration to engineer unconventional magnetic states. These states have potential relevance for quantum technologies, including long-range entanglement of spins and ferroic responses.
A nanostructure composed of silver and an atomically thin semiconductor layer can be turned into an ultrafast switching mirror device, displaying properties of both light and matter. This discovery could lead to dramatically increased information transmission rates in optical data processing.