Articles tagged with Quantum Mechanics
Allen Liu's dissertation resolves major questions in understanding quantum phenomena and simulating physics through learning theory perspectives. Groundbreaking algorithms prove a new physical law, with far-reaching implications still being unraveled by the quantum computing community.
A KAIST research team has synthesized a core raw material for fabricating asymmetric MXene, a so-called 'Janus-faced' nanomaterial with distinct functions on its two sides. This achievement establishes the foundation for implementing asymmetric MXene in various advanced technology fields.
Researchers observe a fully coherent quantum dance between light-induced electronic excitations and crystal lattice vibrations in perovskite nanocrystals. The interaction between excitons and phonons is found to remain well-defined at low temperatures, enabling the evolution of quantum coherence for up to 10 picoseconds.
Researchers from the University of Oxford have demonstrated a new family of quantum superpositions using highly nonclassical building blocks. The experiment used a trapped ion to create exotic motional superpositions with programmable control, revealing true quantum states.
Researchers clarify microscopic origin of charge noise in silicon spin qubits, attributing it to electronic transitions between conduction band and trap states. Higher temperatures improve gate fidelity by reducing switching rates and transition times.
Researchers discovered a more efficient method to eliminate errors in quantum computing by adapting the Schrödinger's cat scenario. They showed that stopping measurements immediately after detecting an error can increase confidence and reduce disturbance, enabling the detection of quantum information without disrupting it.
Researchers at TUM have developed a protein-based sensor that can detect magnetic fields and be controlled by radio waves. This technology has great potential for near-term biotechnological applications, including biological quantum sensors and radio wave-controlled cell activity.
Researchers at Colorado State University have measured a hydrogen proton's radius to be 0.84 femtometers, resolving the long-standing scientific discrepancy that has puzzled scientists for years. The finding confirms the Standard Model theory and opens a door for further study, revealing subtle issues in earlier measurements.
A new quantum chemistry method predicts the behavior of molecules under light with lower computational cost, enabling the study of larger systems and complex reaction pathways. This breakthrough advances the discovery of next-generation materials and deepens understanding of molecular behavior under light.
The University of Tennessee at Knoxville is launching the Knoxville Quantum Accelerator, a collaborative effort to develop and commercialize quantum technologies. The initiative will support the development of an ecosystem that advances both fundamental discovery and applications.
Researchers measured hydrogen's hyperfine splitting in antihydrogen, a tiny energy difference that could reveal a hidden difference between matter and antimatter. The study confirmed the symmetry between the two, but future measurements aim to improve precision and potentially break current physics understanding.
Scientists have successfully created perfect randomness using quantum physics, a breakthrough that could revolutionize digital security. By amplifying imperfect randomness, they can generate perfectly random numbers for encryption and other applications, rendering existing systems vulnerable to attacks.
Researchers from The University of Osaka created a cobalt-based honeycomb structure that exhibits strong magnetic interactions and ferromagnetic-like behavior. This breakthrough may lead to lower-cost quantum computing materials using relatively cheap and widely available cobalt.
QuVET researchers explore how quantum wave functions move through ultra-thin materials, which could improve solar energy technologies and enable new forms of quantum control. They also manipulate quantum states in materials only a few atoms thick, opening possibilities for energy conversion and future quantum technologies.
Researchers at the Flatiron Institute and Boston University have developed a new technique using tensor networks to simulate complex quantum systems, demonstrating that classical computers can tackle previously thought-to-be-solvable-only-by-quantum-computers problems. This breakthrough opens new avenues for research on quantum dynamics.
Scientists at OIST create well-ordered antiferromagnetic crystal with controlled chemical disorder, tracking evolution from order to disorder. They clarify the definition of spin glass, offering a new baseline for studying exotic materials.
The TransEuroOGS project establishes a network of interoperable optical ground stations across Germany, Greece, Ireland, and Luxembourg to enable quantum-secure space-to-ground communication. The project aims to address challenges in secure transnational communication using quantum key distribution.
Scientists have developed a theoretical model showing that atomic clocks can observe the quantum superposition of time. The researchers used modern techniques to detect the signature of entanglement between the clock's motion and its internal energy, improving sensitivity by 100-1000 times.
Scientists have successfully measured incredibly small amounts of energy using a novel calorimeter technique, achieving a world-first in sensitivity. The breakthrough could pave the way for counting individual photons and detecting elusive dark-matter axions in space.
The researchers' hybrid system combines neuromorphic-inspired auto encoding and Fowler-Nordheim annealing to find the most efficient solution. This approach differs from classical computing methods and offers convergence guarantees, ensuring a solution will be found within a set timeframe.
Scientists have successfully demonstrated atomic spin qubit interaction with a single-quantum sound wave, opening up new possibilities for quantum information storage and sensing applications. The experiment uses phonons to interact with atomic defects in diamond, enabling precise measurement of forces and temperatures.
Researchers develop quantum algorithms to simulate polymer degradation caused by UV radiation, using industrially relevant aircraft coatings as an example. The goal is to optimize surface coatings for various industries, improving safety and reducing costs.
Researchers at Cal Poly have discovered a way to create exotic quantum matter by controlling the timing of magnetic fields. This breakthrough could lead to more stable and error-free quantum technologies, including quantum computing and simulation.
Researchers at Oxford have demonstrated a new type of quantum interaction called quadsqueezing, a fourth-order effect that was previously unreachable. By controlling complex forms of squeezing, the team has created stronger and more accessible quantum effects for applications in simulation, sensing, and computing.
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.
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.
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 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 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.
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 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.
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 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 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 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.
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 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 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.
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 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.
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 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.
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.
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...
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.
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.