Current Quantum Physics News and Events

Current Quantum Physics News and Events, Quantum Physics News Articles.
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Spintronics: New production method makes crystalline microstructures universally usable
New storage and information technology requires new higher performance materials. One of these materials is yttrium iron garnet, which has special magnetic properties. Thanks to a new process, it can now be transferred to any material. Developed by physicists at Martin Luther University Halle-Wittenberg (MLU), the method could advance the production of smaller, faster and more energy-efficient components for data storage and information processing. The physicists have published their results in the journal ''Applied Physics Letters''. (2021-02-23)

Scientists propose a new heavy particle similar to the Higgs boson
Unlike the Higgs boson, discovered at CERN's Large Hadron Collider in 2012 after a 40-year quest, the new particle proposed by these researchers is so heavy that it could not be produced directly even in this collider The University of Granada is among the participants in this major scientific advancement in Theoretical Physics, which could help unravel the mysteries of dark matter (2021-02-23)

Concept for a new storage medium
Physicists from Switzerland, Germany and Ukraine have proposed an innovative new data storage medium. The technique is based on specific properties of antiferromagnetic materials that had previously resisted experimental examination. (2021-02-22)

Magnetic effect without a magnet
Electric current is deflected by a magnetic field - this leads to the so-called Hall effect. A surprising discovery has now been made at TU Wien: an exotic metal was examined and a giant Hall effect was found to be produced by the material, in the total absence of any magnetic field. (2021-02-22)

Researchers create 'beautiful marriage' of quantum enemies
Cornell University scientists have identified a new contender when it comes to quantum materials for computing and low-temperature electronics. (2021-02-22)

Lack of symmetry in qubits can't fix errors in quantum computing, might explain matter/antimatter
A team of quantum theorists seeking to cure a basic problem with quantum annealing computers--they have to run at a relatively slow pace to operate properly--found something intriguing instead. (2021-02-22)

Optical frequency combs found a new dimension
Scientists from EPFL and IBM Research Europe have demonstrated the generation of tunable and coherent frequency combs in a pair of hybridised optical microresonators. (2021-02-20)

Atomic nuclei in the quantum swing
The extremely precise control of nuclear excitations opens up possibilities of ultra-precise atomic clocks and powerful nuclear batteries. (2021-02-19)

A speed limit also applies in the quantum world
Even in the world of the smallest particles with their own special rules, things cannot proceed infinitely fast. Physicists at the University of Bonn have now shown what the speed limit is for complex quantum operations. The study also involved scientists from MIT, the universities of Hamburg, Cologne and Padua, and the Jülich Research Center. The results are important for the realization of quantum computers, among other things. (2021-02-19)

D-Wave demonstrates performance advantage in quantum simulation of exotic magnetism
Researchers at D-Wave Systems published a milestone study in collaboration with scientists at Google, demonstrating a computational performance advantage, increasing with both simulation size and problem hardness, to over 3 million times that of corresponding classical methods. This work was achieved on a practical application with real-world implications, simulating the topological phenomena behind the 2016 Nobel Prize in Physics. This performance advantage is a meaningful step in the journey toward applications advantage in quantum computing. (2021-02-18)

Quantum computing: when ignorance is wanted
Quantum technologies for computers open up new concepts of preserving the privacy of input and output data of a computation. Scientists from the University of Vienna, the Singapore University of Technology and Design and the Polytechnic University of Milan have shown that optical quantum systems are not only particularly suitable for some quantum computations, but can also effectively encrypt the associated input and output data. (2021-02-18)

Blueprint for fault-tolerant qubits
Building a quantum computer is a challenging task because of the fragility of quantum bits. To deal with this problem, various types of active error correction techniques have been developed. In contrast, researchers from Jülich and Aachen together with partners from Basel and Delft have now proposed a design for an inherently fault protected circuit with passive error correction that could significantly accelerate the construction of a quantum computer with a large number of qubits. (2021-02-18)

LHC/ATLAS: A unique observation of particle pair creation in photon-photon collisions
Creation of matter in an interaction of two photons belongs to a class of very rare phenomena. From the data of the ATLAS experiment at the LHC, collected with the new AFP proton detectors at the highest energies available to-date, a more accurate - and more interesting - picture of the phenomena occurring during photon collisions is emerging. (2021-02-18)

Investigating the wave properties of matter with vibrating molecules
The working group led by Prof. Stephan Schiller, Ph.D. from Heinrich Heine University Düsseldorf (HHU) has used a novel, high-precision laser spectroscopic experiment to measure the internal vibration of the simplest molecule. This allowed the researchers to investigate the wave character of the motion of atomic nuclei with unprecedented accuracy. They present their findings in the current edition of Nature Physics. (2021-02-18)

Electrons living on the edge
University of Tsukuba researchers calculated the electronic structure of topological insulators excited by laser beams and found that massless states can be generated. This work may lead to a major advance in computer technology with circuits that generate less heat. (2021-02-17)

Harnessing socially-distant molecular interactions for future computing
Could long-distance interactions between individual molecules forge a new way to compute? A new study of electronic states induced by interactions between individual molecules has potential future application in computers where the state of each individual molecule could be controlled, mirroring binary operation of transistors in current computing. (2021-02-16)

Story tips: Modeling COVID, permafrost lost and taking the heat
ORNL story tips: Modeling COVID, permafrost lost and taking the heat. (2021-02-16)

Experimental demonstration of measurement-dependent realities possible, researcher says
Holger F. Hofmann, professor in the Graduate School of Advanced Science and Engineering, Hiroshima University, published a method to experimentally demonstrate the precision of quantum measurements on Feb. 3 in Physical Review Research. His work has implications for our fundamental understanding of physics at the level of individual quantum objects. (2021-02-16)

Sloshing quantum fluids of light and matter to probe superfluidity
'Sloshing' of a quantum fluid comprised of light and matter reveals superfluid properties. An Australian-led team have successfully created sloshing quantum liquids in a 'bucket' formed by containment lasers, gaining new insights of the intriguing superfluid properties of this peculiar, hybrid light-matter system. Superfluidity--the flow of particles without resistance--is pursued by FLEET researchers for future applications in ultra low-energy electronics. (2021-02-16)

New physics rules tested on quantum computer
Simulation of non-Hermitian quantum mechanics using a quantum computer goes beyond centuries old conventions (2021-02-15)

Light used to detect quantum information stored in 100,000 nuclear quantum bits
Researchers have found a way to use light and a single electron to communicate with a cloud of quantum bits and sense their behaviour, making it possible to detect a single quantum bit in a dense cloud. (2021-02-15)

Kagome graphene promises exciting properties
For the first time, physicists from the University of Basel have produced a graphene compound consisting of carbon atoms and a small number of nitrogen atoms in a regular grid of hexagons and triangles. This honeycomb-structured ''kagome lattice'' behaves as a semiconductor and may also have unusual electrical properties. In the future, it could potentially be used in electronic sensors or quantum computers. (2021-02-15)

Applying quantum computing to a particle process
A team of researchers at Lawrence Berkeley National Laboratory (Berkeley Lab) used a quantum computer to successfully simulate an aspect of particle collisions that is typically neglected in high-energy physics experiments, such as those that occur at CERN's Large Hadron Collider. (2021-02-12)

Scientists discovered new physical effects important for the ITER reactor operation
The energy of the future lies in the area of the controlled thermonuclear fusion. Researchers discovered new effects, which affect the energy flow in the reactor. The theoretical predictions were confirmed by the experiments on two tokamaks. The research results were published in the scientific journal 'Plasma Physics and Controlled Fusion'. (2021-02-11)

Combination of pine scent and ozone as super source of particulate emissions
Scientists have managed to figure out why conifer forests produce so many fine particles into the atmosphere. Aerosol particles are particularly abundant when ?-pinene, the molecule responsible for the characteristic pattern of pine trees reacts with atmospheric ozone. (2021-02-11)

Nanowire could provide a stable, easy-to-make superconducting transistor
MIT researchers developed a superconducting nanowire that could enable efficient, easy-to-make electronics. The advance could boost quantum computing, as well as magnetic sensors for applications in brain imaging and telescopes. (2021-02-11)

A new quantum switch for electronics
A Russian physicist and his international colleagues studied a quantum point contact (QCP) between two conductors with external oscillating fields applied to the contact. They found that, for some types of contacts, an increase in the oscillation frequency above a critical value reduced the current to zero - a promising mechanism that can help create nanoelectronics components. (2021-02-11)

UMass Amherst team helps demonstrate spontaneous quantum error correction
Published by the journal Nature, research co-authored by University of Massachusetts Amherst physicist Chen Wang, graduate students Jeffrey Gertler and Shruti Shirol, and postdoctoral researcher Juliang Li takes a step toward building a fault-tolerant quantum computer. They have realized a novel type of QEC where the quantum errors are spontaneously corrected. (2021-02-11)

Placing cosmological constraints on quantum gravity phenomenology
Through new research published in EPJ C, researchers have used well-established cosmological observations to place tighter constraints on the quadratic model of the Generalized Uncertainty Principle, while discrediting the linear model. (2021-02-10)

Quantum effects help minimise communication flaws
Noise limits the performance of modern quantum technologies. However, particles traveling in a superposition of paths can bypass noise in communication. A collaboration between the Universities of Hong-Kong, Grenoble and Vienna, as well as the Austrian Academy of Sciences, under the lead of Philip Walther, reveals novel techniques to reduce noise in quantum communication. The results, published in the latest issue of Physical Review Research, demonstrate that quantum particles traveling in a superposition of paths enable noise reduction in communications. (2021-02-10)

Scientists develop new, faster method for seeking out dark matter
For nearly a century, scientists have worked to unravel the mystery of dark matter. Now, a team of researchers are dramatically speeding up the search for one candidate for this elusive substance called the axion. (2021-02-10)

Quantum causal loops
Causal reasoning is ubiquitous - from physics to medicine, economics and social sciences, as well as in everyday life. Normally, causal influence is assumed to only go one way - from cause to effect - and never back from the effect to the cause: the ringing of the bell does not cause the pressing of the button that triggered it. Now researchers have developed a theory of causality in quantum theory, according to which cause-effect relations can sometimes form cycles. (2021-02-09)

Quantum computing enables simulations to unravel mysteries of magnetic materials
A multi-institutional team became the first to generate accurate results from materials science simulations on a quantum computer that can be verified with neutron scattering experiments and other practical techniques. (2021-02-09)

Scientists create armour for fragile quantum technology
An ANU-led international team has invented the equivalent of 'body armour' for extremely fragile quantum systems, which will make them robust enough to be used as the basis for a new generation of low-energy electronics. (2021-02-08)

3D-printed spectrometer on a 100 x100 μm² footprint
The miniaturisation of spectroscopic measurement devices opens novel information channels in medical science or consumer electronics. Scientists of the University of Stuttgart, Germany, developed a 3D-printed miniature spectrometer with a volume of 100 × 100 × 300 μm³ and a spectral resolution of up to 10 nm in the visible range. This spectrometer can be manufactured directly onto camera sensors, and a parallel arrangement allows for quick (''snapshot'') and low profile, highly customizable hyperspectral cameras. (2021-02-08)

The quantum advantage: a novel demonstration
Scientists have just proved that a quantum machine can perform a given verification task in seconds when the same exercise would take a time equivalent to the age of the universe for a conventional computer. For this demonstration, they combined a complex interactive algorithm that solves a certain type of mathematical problem with limited information and a simple experimental photonics system that can be made in all advanced photonics laboratories. (2021-02-08)

A magnetic twist to graphene
By combining ferromagnets and two rotated layers of graphene, researchers open up a new platform for strongly interacting states using graphene's unique quantum degree of freedom. (2021-02-08)

'Magnetic graphene' forms a new kind of magnetism
Researchers have identified a new form of magnetism in so-called magnetic graphene, which could point the way toward understanding superconductivity in this unusual type of material. (2021-02-08)

Mathematics developed new classes of stellar dynamics systems solutions
The Vlasov-Poisson equations describe many important physical phenomena such as the distribution of gravitating particles in the interstellar space, high-temperature plasma kinetics, and the Landau damping effect. A joint team of scientists from the Mathematical Institute of RUDN University and the Mathematical Institute of the University of Munich suggested a new method to obtain stationary solutions for a system of Vlasov-Poisson equations in a three-dimensional case. (2021-02-05)

The Ramanujan Machine
The study, which was published in the journal Nature, was carried out by undergraduates from different faculties under the tutelage of Assistant Professor Ido Kaminer of the Andrew and Erna Viterbi Faculty of Electrical Engineering at the Technion. (2021-02-05)

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