Articles tagged with Quantum Mechanics
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.
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.
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.
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 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.
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.
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.
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 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.
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.
Assistant Professor Nguyen's research focuses on understanding the fundamental structure of matter by studying the spin of nucleons. Her work aims to fill the gap in knowledge about neutron spin and its influence on material arrangement.
Researchers at the University of Oxford have created magneto-sensitive fluorescent proteins that can interact with magnetic fields and radio waves. The breakthrough uses quantum mechanical interactions within proteins to enable practical technologies.
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.
Researchers found that photons and atoms don't always rapidly reach thermal equilibrium as expected. Instead, they can settle at different temperatures for extended periods, allowing for the preservation of quantum behavior. This prethermal state can last long enough to matter for neutral-atom quantum computers.
A research team at the University of Vienna demonstrates that massive metallic nanoparticles follow quantum mechanics rules, creating a 'Schrödinger's cat state' and breaking existing records for macroscopic scale tests. The experiment shows that even large objects can exhibit wave-like behavior.
Researchers have shown that quantum collapse models, which challenge standard quantum theory, imply a fundamental limit on clock precision due to tiny intrinsic uncertainty in time. This means modern timekeeping technologies are entirely unaffected by such uncertainty.
A research team at Osaka Metropolitan University successfully realized a new type of Kondo necklace with increased localized spin size, demonstrating a clear phase transition to magnetic order. The study shows that the Kondo interaction promotes magnetism when the localized spin is larger than 1/2.
Dr. Marlan Scully traces the journey of quantum mechanics, from its quirky beginnings to its role in solving science's toughest challenges, including quantum computing, cryptography, and gravitational wave detection.
A new framework models pointing error in QKD optical wireless systems, clarifying its role in degrading secure key generation. The study found that increased beam waist and asymmetrical beam misalignment degrade performance, while increasing receiver aperture size and average photon numbers can improve it.
Researchers at Tokyo University of Science demonstrate matter-wave diffraction in a short-lived electron-positron atom, marking a major advancement in fundamental physics. The findings pave the way for new research using positronium and could enable sensitive tests of gravity.
Physicists used a quantum simulator to study the interaction of electrons in a material with a pseudogap state. They found that subtle magnetic patterns shape this mysterious phase of matter, which appears above the temperature at which it becomes superconducting.
Scientists at SwissFEL have developed a technique known as X-ray four-wave mixing, allowing them to access coherences in matter for the first time. This breakthrough has the potential to illuminate how quantum information is stored and lost, ultimately aiding the design of more error-tolerant quantum devices.
A team at Japan's National Institutes for Quantum Science and Technology has published a roadmap outlining the societal payoff of quantum technologies in life science. The study highlights three pillars: cell-scale diamond sensors, practical hyperpolarized MRI, and quantum biology, which enable earlier disease detection, faster drug de...
Researchers investigated energy shifts in 173Yb+ ions, combining experiment and theory to uncover the nucleus's magnetic field distribution. The study provides an experimental foundation for precise clocks and fundamental physics tests using complex ions like Yb+.
Researchers used a quantum device to simulate a vibrating molecule, tracking how energy moves within it. They found that vibrations can actively steer energy flow in unexpected ways, speeding up transfer and opening new pathways.
Scientists have found a way to describe topological states in materials where the particle picture breaks down. The discovery sheds light on a new type of behavior, exhibiting spontaneous Hall effect and quantum-critical fluctuations. This finding opens up possibilities for storing quantum information and developing novel sensors.
Engineers have developed a device that can generate surface acoustic wave phonon lasers, enabling the creation of sophisticated chips in cellphones and other wireless devices. This technology could lead to smaller, higher-performance, and lower-power wireless devices like cell phones.
A new study reveals that crystal dislocations can serve as powerful building blocks for quantum interconnects, enabling the creation of stable and coherent qubits. The researchers showed that nitrogen-vacancy centers in diamond can be attracted to dislocations and retain their quantum properties when positioned near these line defects.
Researchers have discovered a new quantum state of matter that combines quantum criticality and electronic topology, paving the way for advancements in computing, sensing, and materials science. This hybrid state has potential applications in real-world technologies due to its durable and highly sensitive qualities.
The American Physical Society's Global Physics Summit will convene over 14,000 physicists worldwide for groundbreaking research presentations. The event will feature both in-person and online experiences, including scientific sessions, exhibits, and networking events.
Researchers at Institute of Science Tokyo have discovered a stable superfluid that inherently hosts singularities known as exceptional points. The study reveals how dissipation can stabilize this unique superfluid phase, which features a finite order parameter and emerges deep inside a strongly interacting phase.
A team of scientists found alternative explanations for data in topological quantum computing, challenging the field's progress. They proposed changes to increase experimental result reliability by sharing more data and discussing alternative explanations.
Researchers at Texas A&M University are building highly sensitive detectors to explore dark matter and energy. The team's work builds on previous breakthroughs in detecting low-mass particles, and they aim to find ways to amplify signals that were previously buried in noise.
The CHSN01 jacket material has achieved an average yield strength of 1560 MPa at 4.2 K, setting a new benchmark in cryogenic steel properties. This breakthrough demonstrates exceptional mechanical properties, non-magnetic nature, and high-strength performance under extreme conditions.
Researchers have discovered a linear relationship between reactivity and the reciprocal of uranium concentration in thermal-spectrum molten salt reactors. This finding has significant implications for criticality calculations, fuel loading prediction, and reactivity measurement.
Experimental evidence confirms that a single superconductor can induce electron pairing and synchronization in another material, enabling the creation of a Josephson junction with only one superconductor. This discovery has potential implications for topological superconductors and conventional quantum computers.
Professor Keisuke Fujii, a researcher at The University of Osaka, has been selected as one of the Quantum 100 for his work on quantum computing. He was honored with this recognition in 2025, the centennial year of quantum mechanics.
Theoretical physicists at MIT propose that under certain conditions, magnetic material’s electrons could form quasiparticles called “anyons” that can flow together without friction. If confirmed, it would introduce a new form of superconductivity persisting in the presence of magnetism.
Researchers at Paderborn University and TU Dortmund University have developed materials smaller than the wavelength of light and precisely manipulated photons. They created quantum light sources for quantum computing and ultra-fast communication, as well as low-temperature electronics to control quantum experiments.
Scientists have created a new quantum state, known as hybrid excitons, at the interface of organic and 2D semiconductors. This unique state enables ultrafast energy transfer, which holds promise for developing next-generation solar cells and optoelectronic components.
A team from the University of the Witwatersrand and Huzhou University discovered a vast alphabet of high-dimensional topological signatures, enabling robust quantum information encoding. This breakthrough utilizes orbital angular momentum to reveal hidden topologies in entangled photons.
In a groundbreaking discovery, researchers at the Technion and Shanghai Jiao Tong University found that photons can emerge with
Researchers have developed a nearly 100 times smaller device that can efficiently control lasers required for thousands of qubits, unlocking potential for larger quantum computers. The device uses microwave-frequency vibrations to manipulate laser light with extraordinary precision.
Researchers at Tohoku University have discovered a universal quantum rule governing electron-phonon coupling strength, which is linked to the fine-structure constant. The study reveals that this strength is quantized and universally applies to crystals, with implications for designing materials with tailored properties.
Antoine Browaeys, a pioneer in quantum physics, has been recognized for his groundbreaking research on neutral atom arrays and their application to controlled quantum simulation of many-body physics. This platform holds great promise for the future of quantum technologies.
Researchers have demonstrated how controlling the structure of photons in space and time enables tailored quantum states for next-generation communication, sensing, and imaging. This breakthrough offers new pathways for high-capacity quantum communication and advanced technologies.
A NPS doctoral student has been recognized for his groundbreaking research on quantum sensing, aiming to detect minuscule changes in mass from afar. The project involves building an atomic fountain, which will enable sensitivity to gravity nine decimal places of precision.