Articles tagged with Quantum Tunneling
A new study reveals that tiny gaps in ultra-thin devices can strongly influence unwanted electrical leakage. Researchers found that conventional expectations about insulating materials can change at the atomic scale, requiring engineers to consider the full device structure.
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.
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 Dalian Institute of Chemical Physics have identified a novel proton shuttle-assisted triplet energy transfer mechanism, enhancing the rate and efficiency of spin-triplet migration. The discovery has profound implications for modern molecular technologies involving spin-triplet excited states.
Researchers at the Institute of Industrial Science, The University of Tokyo, have precisely detected quantum tunneling of hydrogen atoms in palladium metal. Hydrogen atoms can pass through energy barriers via quantum tunneling due to 'quantum' effects.
Japanese physicists have shown that knots can arise in a realistic particle physics framework, potentially explaining the origin of the universe's matter surplus. By combining two long-studied extensions of the Standard Model, the team found a stable knot configuration that could have formed and dominated in the early universe.
Researchers at Nagoya University have successfully developed a resonant tunnel diode that operates at room temperature using Group IV semiconductor materials. This breakthrough paves the way for terahertz wireless components that can deliver unprecedented speed and data handling capacity with superior energy efficiency.
Researchers from Delft University of Technology have successfully measured the nuclear spin of an on-surface atom in real time, achieving 'single-shot readout'. This breakthrough enables control over the magnetic nucleus and opens up possibilities for quantum sensing at the atomic scale.
Researchers at the University of British Columbia have created a theoretical model for vacuum tunnelling in a 2D superfluid, where vortex pairs appear spontaneously. This work has significant implications for our understanding of quantum mechanics, phase transitions, and superfluids.
Researchers successfully confirmed long-standing 'electron tunneling' phenomenon, revealing surprising interactions between electrons and atomic nuclei during tunneling. The study's findings have significant implications for advanced technologies like semiconductors, quantum computers, and ultrafast lasers.
Researchers find that intense laser pulses cause tunnel ionization, generating photocarriers and altering the lattice energy surface, leading to ultrafast melting of wide-gap ceramic materials like MgO. The study demonstrates a universal microscopic mechanism for laser-induced phase transitions.
Researchers propose that small black holes born in the early universe could have left behind hollow planetoids and microscopic tunnels, potentially detectable with telescopes or by monitoring old materials. The study suggests a low probability of primordial black hole passage but emphasizes the potential for discovery.
A team of researchers found that attosecond angular streaking measurements are closely related to the statistical distribution of momentum/energy of electron wave packets generated by quantum tunneling. The Coulomb focusing effect disrupts this correspondence, revealing new insights into sub-barrier tunneling dynamics.
MIT researchers develop 3D transistors using quantum mechanical properties to achieve low-voltage operation and high performance. The devices can deliver comparable performance to state-of-the-art silicon transistors while operating efficiently at much lower voltages.
A team of researchers from Shibaura Institute of Technology developed a moving particle simulation-aided soil plasticity analysis for earth pressure balance shield tunnelling. The study found that earth pressure is a reliable indicator for analyzing soil plasticity and proposed a computer-aided analysis system that precisely reflects e...
Dr. Wen Li's research aims to discover whether quantum tunneling is instantaneous and develop new detector technologies for fast electron processes. This project has the potential to impact various fields, including medicine, business, and biology.
Physicists from TU Darmstadt propose a new approach to define and measure the time required for quantum tunneling. They suggest using Ramsey clocks, which utilize the oscillation of atoms to determine the elapsed time. The proposed method may correct previous experiments that observed particles moving faster than light during tunneling.
Researchers developed a device controlling tiny magnetic states in ultrathin magnets using tunneling currents, enabling probabilistic computing. This breakthrough could lead to advanced memory devices and entirely new types of computers solving complex problems efficiently.
Researchers develop new mathematical structure to describe tunneling phenomena in quantum mechanics, resolving long-standing problem and opening doors for further applications.
Researchers from Lehigh University have developed a material that promises over 190% quantum efficiency in solar cells, exceeding the theoretical limit for silicon-based materials. The material's 'intermediate band states' enable efficient absorption of sunlight and production of charge carriers.
Researchers at Rice University and the University of Illinois Urbana-Champaign have found that chemical reactions can scramble quantum information, similar to black holes. This discovery could lead to new methods for controlling molecular behavior and improving the reliability of quantum computers.
Researchers at Caltech have demonstrated quantum Barkhausen noise, which is the collection of little magnets flipping in groups. This effect is caused by quantum tunneling and co-tunneling, leading to macroscopic changes in magnetization, even without classical effects.
Researchers developed a new single-molecule transistor that utilizes quantum interference to switch electrons on and off. The device boasts high precision switching, stability, and improved subthreshold swing compared to existing transistors.
The study reveals insights into topological materials by visualizing the motion of coupled pendula, reproducing behaviors of electrons in periodic systems. The researchers directly measure Bloch oscillations and Zener tunneling phenomena, previously impossible to observe in quantum systems.
Researchers studied electron tunneling via neighboring atoms in van der Waals complexes, revealing two capture effects and a new understanding of Coulomb interactions. This discovery has implications for quantum physics, nanoelectronics, and ultrafast optoelectronic devices.
Researchers from Tokyo Institute of Technology have successfully tested quantum annealing on a D-Wave 2000Q quantum computer for optimizing continuous-variable functions. The study found that QA can significantly outperform state-of-the-art classical algorithms, especially when the energy barrier is high.
Researchers at ETH Zurich have found a novel mechanism to produce nanoscale light sources by exploiting the antenna-like behavior of semiconductor materials. By varying the voltage and measuring the current through a tunnel junction, they discovered an exciton resonance that acts as an effective antenna, enabling efficient light emission.
Researchers successfully detect X-ray signature of individual atoms, enabling the identification of materials at an atomic level. The breakthrough technique has potential applications in environmental and medical sciences, as well as advancing technology.
Physicists at FAU have successfully measured and controlled electron release from metals in the attosecond range using a special strategy. This achievement could lead to new quantum-mechanical insights and enable electronic circuits that are a million times faster than current technology.
Researchers developed a new method to distinguish current carriers in the BCS-BEC crossover, a phase transition between superfluids and superconductors. The team measured fluctuations of currents, quantified as the Fano factor, which can identify single-particle- and pair-currents.
Scientists at the University of Innsbruck have successfully measured tunneling reactions in molecular chemistry, confirming a precise theoretical model. The experiment used hydrogen and deuterium isotopes to demonstrate the quantum mechanical tunnel effect in a slow ion-molecule reaction.
A team of researchers has developed an experimental method to manipulate the Rydberg state excitation in hydrogen molecules using bicircular two-color laser pulses. By controlling the photon effect and field effect, they were able to generate Rydberg states while varying the extent to which each effect contributed to the process.
Scientists at Tel Aviv University have developed a method to create the thinnest possible ladder steps made of distinct electric potentials, which can be used as independent information units. The discovery enables the creation of novel devices with potential applications in electronics and optomechanics.
A recent grant will fund a project developing new hardware for machine learning, aiming to curb unsustainable energy use in AI systems. The new algorithms being developed are made available to the research community and compatible with an openly shared computing platform.
Physicists have developed a 'master equation' to understand feedback control at the quantum level, enabling precise real-time control over quantum systems. This breakthrough has the potential to revolutionize quantum technologies by exploiting quantum effects and mitigating fragile system properties.
Researchers develop new scheme to measure tunneling time without theoretical calculation, finding ionization times decrease with increasing electron energy. The technique provides insight into fundamental dynamics of laser-matter interaction and potential retrieval of geometrical information.
Scientists at Aalto University and Oak Ridge National Laboratory develop new method to detect Cooper pairs in unconventional superconductors, enabling unique understanding of quantum materials. This breakthrough represents a major step forward in developing quantum technologies.
A team of physicists and chemists at the University of Surrey used computer modeling to show that quantum mechanics can cause errors in DNA replication, leading to mutations. The researchers found that protons can tunnel through energy barriers, causing mistakes in the pairing of DNA bases.
Behunin's project targets challenges in practical quantum computing by controlling noise and its impact on qubits. By manipulating sound waves, he hopes to quiet the noise that corrupts information stored in quantum computers.
A new protocol called SPoTKD offers a secure way to transmit data without relying on expensive equipment or dedicated channels. Tiny microchips with self-powered clocks can create secure channels, making it possible for devices to power themselves and stay secure.
Scientists have developed an unusual toolbox using quantum physics and molecular mapping to monitor SARS-CoV-2's spike protein. The approach aims to improve diagnosis, variant risk assessment, and treatment by identifying hotspots in the genome where highly-infectious mutations emerge.
Rice University physicists have developed a technique to engineer Rydberg states of ultracold strontium atoms, creating 'synthetic dimensions' that simulate real materials. This breakthrough enables the creation of interacting particles in a controlled environment, paving the way for new physics and material properties.
Researchers designed a sub-nanometer molecular rectifier utilizing destructive quantum interference and asymmetric supramolecular interaction, overcoming electronic functionality challenges. The device achieves rectification behavior at the sub-nanometer scale, enabling potential miniaturization of electronic devices.
The attoscience community has clarified points of tension through discussions among researchers, exploring the scope and nature of analytical and ab-initio approaches. Researchers also investigated the physical observables of quantum tunnelling experiments, aiming to explain differing conclusions.
Researchers from SUTD discover a family of 2D semiconductors with Ohmic contacts, reducing electrical resistance and generating less waste heat. This breakthrough could pave the way for high-performance and energy-efficient electronics, potentially replacing silicon-based technology.
A team from USTC measures first 80 Riemann zeros using a trapped-ion qubit in a Paul trap, achieving high precision. This work provides an experimental basis for studying the Hilbert–Pólya conjecture and understanding the connection between Riemann hypothesis and quantum systems.
Researchers at Huazhong University of Science and Technology developed a scheme to identify and weigh quantum orbits in strong-field tunneling ionization. By introducing a second harmonic frequency, they can alter the photoelectron yield, allowing for accurate identification of quantum orbits. This breakthrough enables attosecond tempo...
Scientists develop a quantum annealing framework to solve the long-standing problem of ion diffusion in solids. The approach shows promising results, especially when compared to other computational techniques, and could expand materials science.
Researchers studying quantum materials aim to design new materials with novel thermal properties, potentially enhancing energy efficiency in devices. Sheila Edalatpour's work may lead to breakthroughs in thermophotovoltaic waste heat recovery, electronic devices, and thermal diodes.
Researchers have developed a microscopy technique that combines ultrafast electron manipulation with sub-nanometer photon detection. This allows for the investigation of quantum systems, sensing, and control, opening new doors for nanoscale science and technology.
A new study by the University of Hong Kong has experimentally proven the existence of Klein tunneling, where relativistic particles can pass through barriers with 100% transmission. This breakthrough has significant implications for fundamental physics and potential applications in sound manipulation and acoustic signal processing.
Researchers at Washington University in St. Louis have created self-powered quantum sensors that can run for over a year with just a small initial energy input. The sensors use a fundamental law of physics to generate power, allowing them to measure ambient motion and other phenomena without batteries.
Researchers develop 16-atom motor with high directional stability, powered by thermal and electrical energy. The motor's operation challenges classical physics and quantum principles, revealing new insights into energy transfer and time direction.
Researchers at the Naval Research Laboratory created a new type of electronic component that surpasses the speed of 5G networks. The gallium nitride-based resonant tunneling diode displays record current outputs and switching speeds, enabling applications in millimeter-wave region and terahertz frequencies.
Researchers at NIST create step-by-step method to produce atomic-scale devices, enabling precise control over quantum tunneling and entanglement. The technique has a nearly 100% success rate and lays the foundation for creating stable single-atom transistors with potential applications in quantum computing.
Researchers successfully suppressed quantum tunneling in ammonia molecules by applying a strong electric field, demonstrating the phenomenon's 'spookiness'. The study uses this approach to explore molecular dynamics and potentially exploit it with other molecules.
Researchers at the University of Kent studied magnetic monopoles and found that they can 'tunnel' through energy barriers, enabling their motion. This breakthrough could signal the development of new technologies based on moving magnetic monopoles instead of electric charges.
Researchers at the University of Maryland have captured evidence of Klein tunneling in a superconductor-superfluid junction, allowing particles to tunnel through barriers. This phenomenon enables engineers to design more uniform components for future quantum computers and devices.
D-Wave's quantum annealing algorithm and quantum computer have been shown to break RSA codes with unprecedented efficiency, outperforming universal quantum computers like Shor's algorithm. This breakthrough highlights the potential of D-Wave for cryptanalysis and code-cracking.
Researchers propose a refined approximation of the photo-excitation equation that describes the effect of photons on rhodopsin protein in eyes. The study has implications for other molecules, like azobenzene, and demonstrates tunnelling process to populate excited states.