Scientists and engineers from the Universities of Bristol and Western Australia have developed how to efficiently simulate a "quantum walk" on a new design for a primitive quantum computer.
Researchers at the University of Chicago and Argonne National Laboratory have integrated trapped electrons with superconducting quantum circuits.
Biological manufacturing process, pioneered by three Lehigh University engineers, produces equivalent quantum dots to those made chemically--but in a much greener, cheaper way.
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The leading method for creating quantum bits, or qubits, currently involves exploiting the structural defects in diamonds. But using NERSC resources, University of Chicago researchers found that the same defect could be engineered in cheaper aluminum nitride. If confirmed by experiments, this could significantly reduce the cost of manufacturing quantum technologies.
In a proof-of-principle experiment, researchers at UNSW Australia have demonstrated that a small group of individual atoms placed very precisely in silicon can act as a quantum simulator, mimicking nature - in this case, the weird quantum interactions of electrons in materials.
An article in the latest edition of the journal Science describes an innovative form of heat engine that operates using only one single atom. The engine is the result of experiments undertaken by the QUANTUM work group at the Institute of Physics of Johannes Gutenberg University Mainz (JGU) in collaboration with theoretical physicists of Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU).
Researchers demonstrated a new material, made from tiny carbon tubes, that emits the desired single photons (of interest for data encryption) at room temperature.
A group of scientists from ITMO University in Saint Petersburg, Russia has developed a novel approach to the construction of quantum communication systems for secure data exchange. The experimental device based on the results of the research is capable of transmitting single-photon quantum signals across distances of 250 kilometers or more, which is on par with other cutting edge analogues. The research paper was published in the Optics Express journal.
Researchers used neutrons to uncover novel behavior in materials that holds promise for quantum computing. The findings provide evidence for long-sought phenomena in a two-dimensional magnet.
Researchers from the Institute for Quantum Computing at the University of Waterloo and the National Research Council of Canada (NRC) have, for the first time, converted the colour and bandwidth of ultrafast single photons using a room-temperature quantum memory in diamond.
Researchers from Griffith University and the University of Queensland have overcome one of the key challenges to quantum computing by simplifying a complex quantum logic operation. They demonstrated this by experimentally realising a challenging circuit -- the quantum Fredkin gate -- for the first time.
Scientists at Florida State University’s National High Magnetic Field Laboratory (MagLab) have demonstrated a way to improve the performance of the powerful building blocks of quantum computers by reducing interference from the environment.
Speeding Recovery From Cyber-Induced Blackouts, Teaching with 'Big Data', Security Breach in 3-D Printing Process, and more in the Newswise Cybersecurity News Source.
Since the 17th century, science was intrigued by the nature of light. Isaac Newton was certain that it consists of a stream of particles. His contemporary Christiaan Huygens, however, argued that light is a wave. Modern quantum physics says that both were right.
'Four-Flavored' Tetraquark, Planets Born Like Cracking Paint, New 2D Materials, The World's Newest Atom-Smasher in the Physics News Source sponsored by AIP.
Just as the single-crystal silicon wafer forever changed the nature of communication 60 years ago, a group of Cornell researchers is hoping its work with quantum dot solids – crystals made out of crystals – can help usher in a new era in electronics.
New research demonstrates that particles at the quantum level can in fact be seen as behaving something like billiard balls rolling along a table, and not merely as the probabilistic smears that the standard interpretation of quantum mechanics suggests. But there's a catch - the tracks the particles follow do not always behave as one would expect from "realistic" trajectories, but often in a fashion that has been termed "surrealistic."
Researchers at the University of Chicago and the University of Konstanz have demonstrated the ability to generate a quantum logic operation, or rotation of the qubit, that is intrinsically resilient to noise as well as to variations in the strength or duration of the control.
In what may provide a potential path to processing information in a quantum computer, researchers have switched an intrinsic property of electrons from an excited state to a relaxed state on demand using a device that served as a microwave “tuning fork."
Plasmons, quasiparticles arising from the collective motion of electrons on the surface of a metal, can strongly modify the behavior of nearby light, and could be instrumental in building some of the key components of a quantum circuit. But far more must be learned about their effects to develop them as a material.
Scientists at the U.S Department of Energy's (DOE) Brookhaven National Laboratory and Stony Brook University have discovered a new way to generate very low-resistance electric current in a new class of materials. The discovery, which relies on the separation of right- and left-"handed" particles, points to a range of potential applications in energy, quantum computing, and medical imaging, and possibly even a new mechanism for inducing superconductivity--the ability of some materials to carry current with no energy loss.
The way to better wearable electronics is dotted with iron steppingstones. Check out how Michigan Tech researcher Yoke Khin Yap’s nanotubes bridge the gap with quantum tunneling.
An international group of physicists led by the University of Arkansas has created an artificial material with a structure comparable to graphene.
The Air Force Office of Scientific Research has awarded a $360,000 grant to a University of Arkansas physicist who studies semiconducting nanomaterials that could power a new generation of electronic devices.
Physicists have long predicted the possibility of tying knots in quantum fields. But no one has been able to make or observe a three-dimensional quantum knot, until now. In a breakthrough discovery explored in a paper published in Nature Physics, one of the most prestigious journals in physics, a scientific team led by Amherst Physics Professor David S. Hall ’91 and Aalto University (Finland) Professor Mikko Möttönen have found a way to create knotted solitary waves in a quantum-mechanical field.
A study led by Ángel Rubio, the UPV/EHU-University of the Basque Country professor and head of the Max Planck Institute in Hamburg, shows that it is possible to predict the effects of photons on materials.
Higher cost of electricity not necessarily deterrent to usage; Finding opens door for lead-free electromechanics; Neutron measurements provide insight into quantum magnets.
• The Weizmann Institute Quantum Optics team has devised a way to pluck a single photon from a pulse of light. This breakthrough can both aid further basic research into the nature of light and help advance quantum communication systems, which will likely be based on single photons.
A Stony Brook University research team has developed new tools to test the fundamental constituents of a quantum information processor, a device that manipulates data based on quantum mechanics and therefore would have computing power well beyond the capabilities of a classic computer.
Researchers in David Awschalom’s group at the University of Chicago have demonstrated that macroscopic entanglement can be generated at room temperature and in a small magnetic field.
Scientists from Brookhaven National Laboratory and Ludwig Maximilian University have proposed a solution to the subatomic stoppage of electron flow due to defects in materials: a novel way to create a more robust electron wave by binding together the electron's direction of movement and its spin.
In this Q&A, Particle Physics and Astrophysics Professor Lance Dixon of Stanford University and the Department of Energy’s SLAC National Accelerator Laboratory explains one approach to developing such a theory, called quantum gravity.
In 1655 the English mathematician John Wallis published a book in which he derived a formula for pi as the product of an infinite series of ratios. Now researchers from the University of Rochester, in a surprise discovery, have found the same formula in quantum mechanical calculations of the energy levels of a hydrogen atom. The researchers report their findings in the Journal of Mathematical Physics.
"God does not play dice," Albert Einstein once quipped. A study published in Nature gives the strongest refutation to date of Albert Einstein's principle of "local realism," which says that the universe obeys laws, not chance, and that there is no communication faster than light.
If you take certain atoms and make them almost as cold as they possibly can be, the atoms will fuse into a collective low-energy quantum state called a Bose-Einstein condensate. In 1968 physicist Herbert Fröhlich predicted that a similar process at a much higher temperature could concentrate all of the vibrational energy in a biological protein into its lowest-frequency vibrational mode. Now scientists in Sweden and Germany have the first experimental evidence of such so-called Fröhlich condensation. They report their results in the journal Structural Dynamics.
A team of scientists from the University of Chicago and the Pennsylvania State University have accidentally discovered a new way of using light to draw and erase quantum-mechanical circuits in a unique class of materials called topological insulators.
Quasiparticles are central to energy applications but can be difficult to detect. Researchers at Oak Ridge National Laboratory have seen evidence of quasiparticles called negative trions forming and fading in an ultrathin layer of semiconducting material.
A group of researchers in Japan is exploring the behavior of a certain type of SET (single-electron transistor) made from two quantum dots, which are bits of material so small they start to exhibit quantum properties. The group has produced a detailed analysis of the electrical characteristics of the so-called double-quantum-dot SETs, which could help researchers design better devices to manipulate single electrons. They report their findings in the Journal of Applied Physics.
Physicists have wondered in recent years if they could control how atoms interact using light. Now they know that they can, by demonstrating games of quantum billiards with unusual new rules.
A new trend taking shape in psychological science not only uses quantum physics to explain humans’ (sometimes) paradoxical thinking, but may also help researchers resolve certain contradictions among the results of previous psychological studies.
Researchers from the University of Southampton have demonstrated for the first time a new laser cooling method, based upon the interference of matter waves, that could be used to cool molecules.
An international team of scientists, including Dr Luca Sapienza from the University of Southampton, have developed a new technique for finding quantum dots.
University of Chicago researchers have made a crucial step toward nuclear spintronic technologies. They have gotten nuclear spins to line themselves up in a consistent, controllable way, and they have done it using a high-performance material that is practical, convenient, and inexpensive.
Scientists built nanoscale mirrors to trap light around atoms inside of diamond crystals. The mirrored cavities allow light to bounce back and forth up to 10,000 times, enhancing the normally weak interaction between light and the electronic spin states in the atoms. As a result, a 200-microsecond spin-coherence time was produced. The enhanced interactions and extended spin-coherence times are essential steps toward realizing quantum computing systems to solve some problems faster than conventional systems.
A quantum mechanical transport phenomenon demonstrated for the first time in synthetic, atomically-thin layered material at room temperature could lead to novel nanoelectronic circuits and devices, according to researchers at Penn State and three other U.S. and international universities.
Quantum dots promise an astounding range of applications, if scientists can conquer their annoying habit of blinking. Researchers computing at NERSC recently ran simulations that offer new insights into the problem.
A team of scientists have taken quantum teleportation – a method of communicating information from one location to another without having to physically move it – to a higher level by using certain high-dimensional states (which they dubbed “donut” states) for teleportation. Stony Brook University physicist Tzu-Chieh Wei, PhD, and colleagues nationally demonstrated that their method works, is more reliable than previous teleportation schemes, and could be a stepping stone toward building a quantum communications network. Their findings appear in Nature Communications.
JQI physicists, led by Trey Porto, are interested in quantum magnetic ordering, which is believed to be intimately related to high-temperature superconductivity and also has significance in other massively connected quantum systems. Recently, the group studied the magnetic and motional dynamics of atoms in a specially designed laser-based lattice that looks like a checkerboard. Their work was published in the journal Science.
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