Partnership at a distance: Deep-frozen helium molecules
Researchers in Frankfurt confirm the quantum-mechanical tunnel effect in deep-frozen helium molecules. The study reveals that over 75% of bonding time can be explained by this effect.
Quantum Tunneling
Articles tagged with Quantum Tunneling
Trickling electrons
At temperatures near absolute zero, electrons exhibit their quantum nature and form a granular medium, consisting of individual particles that trickle through a conductor. This phenomenon can be explained by quantum electrodynamics.
Controlling quantum states atom by atom
A team of researchers has developed a method to precisely alter the quantum mechanical states of electrons in an array of quantum boxes. This allows for the investigation of interactions between various types of atoms and electrons, crucial for advancing quantum technologies.
ORNL researchers discover new state of water molecule
Researchers at Oak Ridge National Laboratory discovered a new state of water molecules exhibiting quantum tunneling behavior under ultra-confinement. This phenomenon is unmatched by any known gas, liquid, or solid states, with implications for understanding thermodynamic properties and behavior in confined environments.
Exotic quantum effects can govern the chemistry around us
Researchers from Warsaw's Institute of Physical Chemistry discovered that quantum tunneling plays a dominant role in chemical reactions, even at room temperature. This finding could lead to precise control of chemical reactions through mode-selective chemistry.
The iron stepping stones to better wearable tech without semiconductors
Researchers have created a new material using quantum dots of iron on boron nitride nanotubes, which can replace semiconductors in wearable technology. This new material enables transistors to shrink and reduces heat generation, making it suitable for flexible and efficient wearable electronics.
New record in nanoelectronics at ultralow temperatures
The research team successfully cooled electrons to 3.7 millikelvin in a nanoelectronic device, breaking the previous record of 4 millikelvin. This breakthrough enables the development of new quantum technologies, including quantum computers and sensors, which require extremely low temperatures.
Soundproofing with quantum physics
Researchers have successfully applied topological insulator principles to mechanical systems, creating edge states that exhibit robust, 'topologically protected' properties. These properties make them suitable for applications in sound and vibration insulation, as well as focusing sound like a lens.
Physicists solve quantum tunneling mystery: ANU media release
An international team of scientists has solved a quantum mechanics mystery, finding that quantum tunneling is an instantaneous process. The new theory could lead to breakthroughs in areas like electron microscopy, nuclear fusion, and DNA mutations.
Researchers observe new charge transport phenomenon
Researchers at Aalto University and German University of Marburg have discovered a new type of charge transport phenomenon that enables logical operations in microelectronics. The phenomenon involves the transfer of information between an electron hole pair without tunneling, opening up new possibilities for electronics and biology.
Scientists set quantum speed limit
Researchers at University of California - Berkeley proved a fundamental relationship between energy and time, setting a 'quantum speed limit' on various processes. The discovery has implications for quantum computing, tunneling, and optical switching.
Long-range tunneling of quantum particles
A team of scientists at the University of Innsbruck has directly observed long-range tunneling of quantum particles through up to five potential barriers. The researchers used a gas of Cesium atoms in an engineered optical lattice, where they applied a directed force to initiate tunneling motion.
Chapman University affiliated physicist publishes on the Aharonov-Bohm effect in Nature
Physicist Yutaka Shikano has observed the Aharonov-Bohm effect with quantum tunneling in a linear Paul trap for the first time. The experiment demonstrates the measurable impact of a magnetic field on charged particles, verifying a fundamental component of modern physics.
Researchers bolster development of programmable quantum computers
University of Chicago researchers created a proof-of-concept experiment to aid future development of programmable quantum computers. They replicated features of smaller, specialized computers by manipulating trillions of quantum mechanical spins in a crystal.
The quantum secret to alcohol reactions in space
Chemists discovered that quantum tunnelling enables alcohol reactions in space to occur vigorously at minus 210 degrees Celsius, 50 times faster than at room temperature. The phenomenon allows for the creation of methoxy radicals under extreme cold conditions, shedding light on complex molecule formation in interstellar space.
Coupled particles cross energy wall
Researchers have demonstrated a new type of quantum phenomenon called Klein tunnelling for two interacting particles. By crossing an energy barrier together, the particles can tunnel through what would otherwise be impassable to individual particles.
Nature: Smallest vibration sensor in the quantum world
Researchers created a quantum sensor that detects the smallest vibrations in a carbon nanotube by measuring the effects of a magnetic spin on its mechanical motion. The device has potential applications in determining individual molecule masses and measuring magnetic forces.
Space race under way to create quantum satellite
Researchers are pursuing a quantum satellite concept to establish a secure global quantum communication network by harnessing the signal's travel time in empty space. The team has emphasized precise alignment between the satellite and ground stations to ensure accurate measurement of photons.
Nanoparticles digging the world's smallest tunnels
Scientists at KIT and Rice University successfully dug the world's smallest tunnels into graphite samples, opening doors to structuring of materials on a nanometer scale. The creation of porous graphite with tailored pore sizes could enhance lithium-ion battery performance and enable long-term drug delivery in medicine.
Science: Quantum oscillator responds to pressure
Researchers at KIT have developed a method to control atomic tunneling frequencies in solids, using Josephson junctions. The technique allows for the direct measurement and manipulation of individual quantum systems, opening new possibilities for nanoelectronic components and materials science research.
First images of Landau levels revealed
Scientists at the University of Warwick and Tohoku University have directly imaged Landau Levels, showing concentric rings that increase according to energy level. The discovery uses scanning tunnelling spectroscopy to overcome material disorder, shedding light on the quantum Hall effect.
A new kind of quantum junction
Researchers at RIKEN Advanced Science Institute successfully demonstrate coherent quantum phase slip (CQPS) in a narrow superconducting wire, shedding light on an elusive phenomenon. This breakthrough enables the development of novel quantum devices that exploit CQPS functionality.
Controlling quantum tunneling with light
Researchers at University of Cambridge use light to guide electrons through a barrier, creating new particles that interact strongly. This breakthrough has potential to lead to practical devices using quantum mechanics visible to the eye.
A hidden order unraveled
Scientists directly observe quantum-correlated particle-hole pairs in a one-dimensional optical lattice, allowing them to unravel a hidden order in the crystal. The work reveals fluctuations at absolute zero temperature and opens new ways to characterize novel quantum phases of matter.
UGA researcher leads discovery of a new driving force for chemical reactions
New research reveals quantum mechanical tunneling as a driving force for chemical reactions, changing how scientists understand and devise reactions. The discovery has potential applications in materials science, biochemistry, and more.
Tunnels concentrate air pollution by up to 1,000 times
A new study found that road tunnels can concentrate ultrafine particles and pollutants by up to 1000 times, posing serious health risks to occupants. This concentration level is higher than previously reported measurements.
Q is for quantum and 'Q-life'
Researchers discuss how physics is changing our understanding of cells, brain function, and the potential role of quantum mechanics in biology. Paul Davies suggests that fundamental quantum processes could be key to understanding life's origins.
Evidence of macroscopic quantum tunneling detected in nanowires
A team of researchers at the University of Illinois has demonstrated macroscopic quantum tunneling in ultrathin superconducting nanowires. They observed a process called quantum phase slip, where packs of electrons tunnel together from higher to lower current states. This finding provides evidence that quantum mechanics governs large s...
Covering the bases: Quantum effect may hold promise for low-cost DNA sequencing, sensor applications
A new technique using scanning tunneling and atomic force microscopes can identify complementary DNA base pairs by measuring the strength of hydrogen bonds. This method could lead to a new DNA sequencing technology that is faster and cheaper than current methods.
Phantom parent molecule of important class of chemical compounds isolated for first time
Researchers have successfully synthesized the elusive carbene hydroxymethylene (HCOH) molecule, shedding light on its behavior and potential uses in organic chemistry. The discovery, reported in Nature, involved trapping HCOH at extremely low temperatures and observing its decay to formaldehyde through quantum tunneling.
Future 'quantum computers' will offer increased efficiency ... and risks
Researchers have made a unique discovery that could lead to the development of quantum computers, which would render current encryption technologies useless. The breakthrough involves controlling quantum tunneling in molecular magnets, allowing for faster and more efficient computation.
Physicist's innovative technique makes atomic-level microscopy at least 100 times faster
A physicist has developed a novel technique to speed up scanning tunneling microscopy, enabling it to image individual atoms on a surface at least 100 times faster. The new method uses radio frequency waves to detect changes in distance between the probe and sample surface, reducing measurement times by several orders of magnitude.
Electrons caught in the act of tunneling
Researchers have successfully observed electrons tunnelling through the binding potential of an atom nucleus under the influence of laser light. This breakthrough allows scientists to study electron movement in real-time and has implications for microelectronics and radiation therapy.
New JILA apparatus measures fast nanoscale motions
A new nanoscale apparatus developed at JILA measures the wiggling of a tiny gold beam using electrons, enabling faster scanning tunneling microscopes. The device offers a potential 500-fold increase in speed and can measure atomic vibrations in high definition.
Delicate relation between single spins
Researchers access interaction between single magnetic adatoms on a metal surface by comparing experimental results with detailed theoretical analysis. They observe novel magnetic state for chain of three cobalt adatoms and improve understanding of fundamental interactions between single spins.
Asymmetric feature shows puzzling face for superconductivity
Researchers discovered a significant deviation from expected symmetry in the density of states of excitations in high-temperature superconducting tunnel junctions. The findings suggest that crystals of high-temperature superconductors, with a titanate layer, exhibit intrinsic particle-hole asymmetry.
UD Computer News: Future Looks Bright For Tunnel Diodes, Promising Faster, More Efficient Circuits
Researchers at the University of Delaware have developed promising new tunnel diodes that could boost silicon-based circuit speeds. The breakthrough technology has the potential to enhance existing production lines and reduce power losses, leading to more efficient and cost-effective chips.
Neutron Tunneling States In Magnetic Media: A New Sensitive Tool For The Exploration Of Surfaces
Researchers used neutron tunneling to study magnetic properties of thin iron films, discovering a sensitive tool for exploring surfaces. The phenomenon shows promise for studying subtle magnetic phenomena in technological materials.