Current Quantum News and Events

Current Quantum News and Events, Quantum News Articles.
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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)

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)

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)

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)

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)

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)

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)

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)

New microscopy concept enters into force
The first demonstration of an approach that inverts the standard paradigm of scanning probe microscopy raises the prospect of force sensing at the fundamental limit. (2021-02-05)

Breakthrough in quantum photonics promises a new era in optical circuits
In recently published work, researchers at USC have shown that single photons can be emitted in a uniform way from quantum dots arranged in a precise pattern. The team has used such methods to create single-quantum dots, with their remarkable single-photon emission characteristics. It is expected that the ability to precisely align uniformly-emitting quantum dots will enable the production of optical circuits, potentially leading to novel advancements in quantum computing and communications technologies (2021-02-05)

New quantum receiver the first to detect entire radio frequency spectrum
A new quantum sensor can analyze the full spectrum of radio frequency and real-world signals, unleashing new potentials for soldier communications, spectrum awareness and electronic warfare. (2021-02-04)

Harvard scientists use trilayer graphene to observe more robust superconductivity
Harvard scientists report successfully stacking three sheets of graphene and then twisting each of them at a magic angle to produce a three-layered structure that is not only capable of superconductivity but does so more robustly and at higher temperatures than many of the double-stacked graphene. (2021-02-04)

Switching nanolight on and off
The report demonstrates a new method to control the flow of light of nanolight. Optical manipulation on the nanoscale, or nanophotonics, has become a critical area of interest as researchers seek ways to meet the increasing demand for technologies that go well beyond what is possible with conventional photonics and electronics. (2021-02-04)

On the dot: Novel quantum sensor provides new approach to early diagnosis via imaging
A phenomenon called 'oxidative stress' is seen in affected organs during the early stages of certain difficult-to-treat diseases like cancer and kidney dysfunction. Detecting oxidative stress could thus enable early diagnosis and preventive treatments. But, the in vivo measurement of oxidative stress caused by both oxidation and reduction has historically been difficult. Now, scientists have developed an advanced quantum sensor technology that can detect 'oxidative stress' non-invasively throughout the body using fluorescent imaging and MRI. (2021-02-03)

"Ghost particle" ML model permits full quantum description of the solvated electron
Pinning down the nature of bulk hydrated electrons has proven difficult experimentally because of their short lifetime and high reactivity. Theoretical exploration has been limited by the high level of electronic structure theory needed to achieve predictive accuracy. Now, joint work from teams at the University of Zurich and EPFL has resulted in a highly accurate machine-learning model inexpensive enough to allow for a full quantum statistical and dynamical description. (2021-02-03)

A new hands-off probe uses light to explore electron behavior in a topological insulator
Topological insulators are one of the most puzzling quantum materials. Their edges are electron superhighways where electrons flow with no loss, while the bulk of the material blocks electron flow - properties that could be useful in quantum computing and information processing. Researchers at SLAC and Stanford used a process called high harmonic generation to separately probe electron behavior in both of those domains. The method should be applicable to a broad range of quantum materials. (2021-02-02)

Researchers design next-generation photodetector
The new long-wavelength infrared photodetector from Professor Manijeh Razeghi could be used in night vision, optical communication, and thermal and medical imaging. (2021-02-02)

Research could dramatically lower cost of electron sources
Rice University engineers have discovered technology that could slash the cost of semiconductor electron sources, key components in devices ranging from night-vision goggles and low-light cameras to electron microscopes and particle accelerators. (2021-02-01)

The first steps toward a quantum brain
An intelligent material that learns by physically changing itself, similar to how the human brain works, could be the foundation of a completely new generation of computers. Radboud physicists working toward this so-called 'quantum brain' have made an important step. They have demonstrated that they can pattern and interconnect a network of single atoms, and mimic the autonomous behaviour of neurons and synapses in a brain. (2021-02-01)

Backreaction observed for first time in water tank black hole simulation
Scientists have revealed new insights into the behaviour of black holes with research that demonstrates how a phenomenon called backreaction can be simulated. (2021-02-01)

Beyond qubits: Sydney takes next big step to scale up quantum computing
Professor David Reilly and colleagues have invented a device that operates at 40 times colder than deep space to directly control thousands of qubits, the building blocks of quantum computers. (2021-02-01)

Physicists develop record-breaking source for single photons
Researchers at the University of Basel and Ruhr University Bochum have developed a source of single photons that can produce billions of these quantum particles per second. With its record-breaking efficiency, the photon source represents a new and powerful building-block for quantum technologies. (2021-01-28)

Efficient fluorescent materials and OLEDs for the NIR
Near-infrared emitters (NIR) will be of crucial importance for a variety of biomedical, security and defence applications, as well as for (in)visible light communications and the internet-of-things (IoT). Researchers from the UK and Italy have developed porphyrin oligomer NIR emitters which afford high efficiencies despite being totally free from heavy metals. They demonstrated organic light-emitting diodes (OLEDs) at 850 nm with 3.8% peak external quantum efficiency, together with a novel quantitative model of device efficiency. (2021-01-28)

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