Coupling a nano-trumpet with a quantum dot enables precise position determination

Scientists have succeeded in coupling an extremely small quantum dot with 1,000 times larger trumpet-shaped nanowire. The movement of the nanowire can be detected with a sensitivity of 100 femtometers via the wavelength of the light emitted by the quantum dot. Conversely, the oscillation of the nanowire can be influenced by excitation of the quantum dot with a laser. […] Read More

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First experimental observation of new type of entanglement in a 2-D quantum material

Many physical phenomena can be modeled with relatively simple math. But, in the quantum world there are a vast number of intriguing phenomena that emerge from the interactions of multiple particles—”many bodies” – which are notoriously difficult to model and simulate, even with powerful computers. Examples of quantum many body states with no classical analogue include superconductivity, superfluids, Bose-Einstein condensation, quark-gluon plasmas etc. As a result, many “quantum many-body” models…

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First experimental observation of new type of entanglement in a 2-D quantum material

Scientists have shown experimentally, for the first time, a quantum phase transition in strontium copper borate, the only material to date that realizes a famous quantum many-body model. […] Read More

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Plasmon-powered devices for medicine, security, solar cells under development

A new method that takes advantage of plasmonic metals’ production of ‘hot’ electrons and holes to boost light to a higher frequency could be suitable for medical, energy and security applications. […] Read More

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New breakthrough discovery—every quantum particle travels backwards

Mathematicians at the Universities of York, Munich and Cardiff have identified a unique property of quantum mechanical particles – they can move in the opposite way to the direction in which they are being pushed. […] Read More

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Manipulating electron spins without loss of information

Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been recently demonstrated. […] Read More

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Evidence of the Higgs particle’s decay in quarks

Researchers have found strong evidence that, among other things, the Higgs particle decays into quarks. The researchers analyzed data sets that were recorded in 2015 and 2016 with the ATLAS detector at the world’s largest particle accelerator, the Large Hadron Collider (LHC) at the European Organization for Nuclear Research (CERN) in Geneva, Switzerland. […] Read More

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Simulation reveals universal signature of chaos in ultracold reactions

Researchers have performed the first ever quantum-mechanical simulation of the benchmark ultracold chemical reaction between potassium-rubidium (KRb) and a potassium atom, opening the door to new controlled chemistry experiments and quantum control of chemical reactions that could spark advances in quantum computing and sensing technologies. […] Read More

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Smallest particles and the vastness of the universe connected

Are density distributions of the vast universe and the nature of smallest particles related? Scientists have now revealed the connection between those two aspects, and argued that our universe could be used as a particle physics ‘collider’ to study the high energy particle physics. Their findings mark the first step of cosmological collider phenomenology and pave the way for future discovery of new physics unknown yet to humankind. […] Read…

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Path to discovering new topological materials

Researchers have found a recipe for discovering new topological materials, which have exotic electronic properties that hold promise for future technologies. Until now, finding these materials has been a matter of trial and error. […] Read More

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Probability that the quantum world obeys local realism is less than one in a billion, experiment shows

(Phys.org)—Physicists have reported some of the strongest evidence yet that that the quantum world does not obey local realism by demonstrating new evidence for the existence of quantum entanglement. By performing an essentially loophole-free Bell test, they have shown that two atoms separated by a distance of a quarter of a mile share correlations that should be impossible under the hypothesis of local realism, and are most likely explained by…

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Semiliquid chains pulled out of a sea of microparticles

An electrode brought to the surface of a liquid that contains microparticles can be used to pull out surprisingly long chains of particles. Curiously enough, the particles in the chains are held together by a thin layer of liquid that covers them. […] Read More

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Evidence for the Majorana fermion, a particle that’s its own antiparticle

In a discovery that concludes an 80-year quest, researchers found evidence of particles that are their own antiparticles. These ‘Majorana fermions’ could one day help make quantum computers more robust. […] Read More

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Scientists observe gravitational anomaly on Earth

Modern physics has accustomed us to strange and counterintuitive notions of reality—especially quantum physics which is famous for leaving physical objects in strange states of superposition. For example, Schrödinger’s cat, who finds itself unable to decide if it is dead or alive. Sometimes however quantum mechanics is more decisive and even destructive. […] Read More

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Most precise measurement of the proton’s mass

By means of precision measurements on a single proton, scientists have been able to improve the precision of the measurement of the mass of the proton by a factor of three and also corrected the existing value, finding it is significantly lighter than previously believed. […] Read More

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Energy-efficient accelerator was 50 years in the making

With the introduction of the Cornell-Brookhaven ERL Test Accelerator, scientists are following up on the concept of energy-recovering particle accelerators first introduced by physicist Maury Tigner at Cornell more than 50 years ago. […] Read More

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New spectroscopic method enables simple and precise analysis of nanoparticle structure

Researchers suggest easy analysis method to identify the structure of semiconductor nanoparticles in solution only by measuring absorption spectrum. It is expected to present a new direction for the studies of the structure and the properties of nanoparticles. […] Read More

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Construction of massive neutrino experiment kicks off a mile underground

A new era in international particle physics research officially began July 21 with a unique groundbreaking held a mile underground at the Sanford Underground Research Facility in South Dakota. Dignitaries, scientists and engineers from around the world marked the start of construction of a massive international experiment that could change our understanding of the universe. The Long-Baseline Neutrino Facility (LBNF) will house the international Deep Underground Neutrino Experiment (DUNE), which…

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Advancing knowledge toward more efficient electronics

A recent discovery of a new magnetic semimetal could eventually lead to more energy-efficient computers, televisions, radios and other electronics. […] Read More

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Magnetic quantum objects in a ‘nano egg carton’

Magnetic quantum objects in superconductors, so-called “fluxons,” are particularly suitable for the storage and processing of data bits. Computer circuits based on fluxons could be operated with significantly higher speed while dissipating much less heat. Physicists working with Wolfgang Lang at the University of Vienna and their colleagues at the Johannes-Kepler-University Linz have developed a “quantum egg carton” with a novel and simple method. They realized a stable and regular…

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‘Tiny dancer’ atoms could prove a hit with quantum computer scientists

Quantum computers could be a step closer to practical use thanks to the work of an international team led by University of Surrey scientists. The group, led by Dr Steve Chick and Professor of Physics Ben Murdin, has developed a way of making phosphorous atoms ‘dance’, which could be the next breakthrough in the quest to make quantum computers a viable reality. […] Read More

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Magnetic quantum objects in a ‘nano egg-box’

Magnetic quantum objects in superconductors, so-called ‘fluxons,’ are particularly suitable for the storage and processing of data bits. Physicists have now succeeded in producing a ‘quantum egg-box’ with a novel and simple method. They realized a stable and regular arrangement of hundreds of thousands of fluxons. […] Read More

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The microscopic origin of thermodynamics

A deep understanding of the irreversibility of the arrow of time cannot ignore the quantum nature of the world that surrounds us. […] Read More

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Researchers demonstrate new way to produce high-density clusters of aligned quantum sensors in diamond

Imagine a sensor so sensitive it can detect changes in the proton concentration of a single protein, within a single cell. This level of insight would reveal elusive quantum-scale dynamics of that protein’s function, potentially even in real time, but demands a sensor with controllable features at a similar scale. […] Read More

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When shallow defects align, diamonds shine for unprecedented quantum sensitivity

Imagine a sensor sensitive enough to detect changes in the proton concentration of a single protein, within a single cell. This level of insight would reveal quantum-scale dynamics of that protein’s function, but demands a sensor with controllable features at a similar scale. Thanks to a new technique, quantum sensing abilities are approaching this scale of precision. […] Read More

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Physicists master unexplored electron property

While the charge and spin properties of electrons are widely utilized in modern day technologies such as transistors and memories, another aspect of the subatomic particle has long remained uncharted. This is the ‘valley’ property which has potential for realizing a new class of technology termed ‘valleytronics’ — similar to electronics (charge) and spintronics (spin). This property arises from the fact that the electrons in the crystal occupy different positions…

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Study sheds light on the role of the entropy in a quantum system

Any understanding of the irreversibility of the arrow of time should account the quantum nature of the world that surrounds us. The is the key result of the work carried out by Vincenzo Alba and Pasquale Calabrese of the International School for Advanced Studies (SISSA) of Trieste, recently published in the journal Proceedings of the National Academy of Sciences (PNAS). […] Read More

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Developing quantum algorithms for optimization problems

Quantum computers of the future hold promise for solving complex problems more quickly than ordinary computers. For example, they can factor large numbers exponentially faster than classical computers, which would allow them to break codes in the most commonly used cryptography system. There are other potential applications for quantum computers, too, such as solving complicated chemistry problems involving the mechanics of molecules. But exactly what types of applications will be…

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Experimental method measures robustness of quantum coherence

Researchers at the UAB have come up with a method to measure the strength of the superposition coherence in any given quantum state. The method, published in the journal Proceedings of the Royal Society A, is based on the measurement of experimental parameters related to the visibility of the interference fringe patterns produced when the two states are superimposed. […] Read More

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Physicists design ultrafocused pulses

Physicists have devised a new simple scheme to theoretically generate arbitrarily short and focused electromagnetic fields. This new tool could be used for precise sensing and in microscopy. […] Read More

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