https://phys.org/physics-news/quantum-physics en-us The latest news on quantum physics, wave particle duality, quantum theory, quantum mechanics, quantum entanglement, quantum teleportation, and quantum computing. Bulk acoustic resonators—stacked material structures inside which acoustic waves resonate—can be used to amplify sounds or filter out undesired noise. These resonators have found wide use in today's RF telecommunication, like Front-End Modules (FEM) in iPhones. They could also be valuable components for various cutting-edge scientific applications, including quantum technologies and imaging devices. https://phys.org/news/2023-10-strategy-spin-acoustic-silicon-vacancies-4h.html Condensed Matter Quantum Physics Fri, 20 Oct 2023 07:00:02 EDT news616933556 A new electrical method to conveniently change the direction of electron flow in some quantum materials could have implications for the development of next-generation electronic devices and quantum computers. https://phys.org/news/2023-10-electrical-quantum-phenomenon-future-electronic.html Condensed Matter Quantum Physics Thu, 19 Oct 2023 11:00:01 EDT news616926339 An international team of scientists is rethinking the basic principles of radiation physics with the aim of creating super-bright light sources. In a new study published in Nature Photonics, researchers from the Instituto Superior Técnico (IST) in Portugal, the University of Rochester, the University of California, Los Angeles, and Laboratoire d'Optique Appliquée in France proposed ways to use quasiparticles to create light sources as powerful as the most advanced ones in existence today, but much smaller. https://phys.org/news/2023-10-scientists-super-bright-sources-powered-quasiparticles.html Optics & Photonics Quantum Physics Thu, 19 Oct 2023 11:00:01 EDT news616926349 The development of tumors begins with miniscule changes within the body's cells; ion diffusion at the smallest scales is decisive in the performance of batteries. Until now, the resolution of conventional imaging methods has not been high enough to represent these processes in detail. A research team lead by the Technical University of Munich (TUM) has developed diamond quantum sensors which can be used to improve resolution in magnetic imaging. https://phys.org/news/2023-10-miniature-magnetic-resonance-imager-diamond.html Optics & Photonics Quantum Physics Thu, 19 Oct 2023 10:21:21 EDT news616929676 Atoms of the metal ytterbium-171 may be the closest things in nature to perfect qubits. A recent study shows how to use them for repeated quantum measurements and qubit rotations, which may aid in the development of scalable quantum computing. https://phys.org/news/2023-10-nondestructive-ytterbium-qubits-aiding-scalable.html Quantum Physics Wed, 18 Oct 2023 14:22:03 EDT news616857721 Quantum mechanics is full of weird phenomena, but perhaps none as weird as the role measurement plays in the theory. Since a measurement tends to destroy the "quantumness" of a system, it seems to be the mysterious link between the quantum and classical world. And in a large system of quantum bits of information, known as "qubits," the effect of measurements can induce dramatically new behavior, even driving the emergence of entirely new phases of quantum information. https://phys.org/news/2023-10-generate-quantum-entanglement-teleportation.html Quantum Physics Wed, 18 Oct 2023 12:24:40 EDT news616850678 One way physicists seek clues to unravel the mysteries of the universe is by smashing matter together and inspecting the debris. But these types of destructive experiments, while incredibly informative, have limits. https://phys.org/news/2023-10-technique-near-miss-particle-physics-tau.html General Physics Quantum Physics Wed, 18 Oct 2023 11:07:40 EDT news616846057 University of Otago physicists have used a small glass bulb containing an atomic vapor to demonstrate a new form of antenna for radio waves. The bulb was "wired up" with laser beams and could therefore be placed far from any receiver electronics. https://phys.org/news/2023-10-physicists-antenna-radio.html Optics & Photonics Quantum Physics Wed, 18 Oct 2023 09:52:03 EDT news616841521 We live in an era of data deluge. The data centers that are operated to store and process this flood of data use a lot of electricity, which has been called a major contributor to environmental pollution. To overcome this situation, polygonal computing systems with lower power consumption and higher computation speed are being researched, but they are not able to handle the huge demand for data processing because they operate with electrical signals, just like conventional binary computing systems. https://phys.org/news/2023-10-ushering-era-light-powered-multi-level-memories.html Condensed Matter Quantum Physics Tue, 17 Oct 2023 11:00:02 EDT news616759201 Conservation laws are central to our understanding of the universe, and now scientists have expanded our understanding of these laws in quantum mechanics. https://phys.org/news/2023-10-thought-laws-reevaluating-quantum-principles.html Quantum Physics Tue, 17 Oct 2023 06:50:01 EDT news616693014 Researchers from Monash University have unlocked fresh insights into the behavior of quantum impurities within materials. https://phys.org/news/2023-10-quantum-mysteries-insights-2d-semiconductor.html Condensed Matter Quantum Physics Mon, 16 Oct 2023 10:53:03 EDT news616672381 Electron microscopes provide unique vistas of nanoscale structures, but their resolution is limited by the mutual repulsion of electrons. Researchers in Göttingen have now succeeded in precisely measuring the influence of these interactions. They discovered an "energetic fingerprint" in which the distribution of the electrons' velocities is characteristic of their respective numbers. This finding has enabled the team to develop a method that could increase the performance of established electron microscopes and open up a new interface between electron microscopy and quantum technology. https://phys.org/news/2023-10-interplay-free-electrons-tailored-electron.html General Physics Quantum Physics Fri, 13 Oct 2023 09:56:24 EDT news616409782 Exciton polaritons, hybrid quasiparticles caused by the strong exciton-photon coupling, constitute a unique prototype for studying many-body physics and quantum photonic phenomena traditionally in cryogenic conditions. https://phys.org/news/2023-10-nonlinear-exciton-polaritons-ws2-monolayer.html Condensed Matter Quantum Physics Fri, 13 Oct 2023 09:26:03 EDT news616407961 Physicists have shown that simulating models of hypothetical time travel can solve experimental problems that appear impossible to solve using standard physics. https://phys.org/news/2023-10-simulations-scientific.html General Physics Quantum Physics Thu, 12 Oct 2023 12:19:18 EDT news616331937 Quantum computers of the future hold promise in solving all sorts of problems. For example, they could lead to more sustainable materials and new medicines, and even crack the hardest problems in fundamental physics. But compared to the classical computers in use today, rudimentary quantum computers are more prone to errors. Wouldn't it be nice if researchers could just take out a special quantum eraser and get rid of the mistakes? https://phys.org/news/2023-10-erase-quantum-errors.html Quantum Physics Thu, 12 Oct 2023 10:15:03 EDT news616324501 Quantum computers promise to reach speeds and efficiencies impossible for even the fastest supercomputers of today. Yet the technology hasn't seen much scale-up and commercialization largely due to its inability to self-correct. Quantum computers, unlike classical ones, cannot correct errors by copying encoded data over and over. Scientists had to find another way. https://phys.org/news/2023-10-self-correcting-quantum.html Quantum Physics Thu, 12 Oct 2023 10:05:12 EDT news616323909 In a new Science Advances study, scientists from the University of Science and Technology of China have developed a dynamic network structure using laser-controlled conducting filaments for neuromorphic computing. https://phys.org/news/2023-10-elevating-neuromorphic-laser-controlled-filaments-vanadium.html Condensed Matter Quantum Physics Thu, 12 Oct 2023 09:27:03 EDT news616321617 Absorption spectroscopy is an analytical chemistry tool that can determine if a particular substance is present in a sample by measuring the intensity of the light absorbed as a function of wavelength. Measuring the absorbance of an atom or molecule can provide important information about electronic structure, quantum state, sample concentration, phase changes or composition changes, among other variables, including interaction with other molecules and possible technological applications. https://phys.org/news/2023-10-alternative-method-simulation-absorption-spectrum.html Optics & Photonics Quantum Physics Wed, 11 Oct 2023 13:41:41 EDT news616250498 In a recent publication in EPJ Quantum Technology, Le Bin Ho from Tohoku University's Frontier Institute for Interdisciplinary Sciences has developed a technique called time-dependent stochastic parameter shift in the realm of quantum computing and quantum machine learning. This breakthrough method revolutionizes the estimation of gradients or derivatives of functions, a crucial step in many computational tasks. https://phys.org/news/2023-10-exploring-parameter-shift-quantum-fisher.html Quantum Physics Wed, 11 Oct 2023 11:56:00 EDT news616244158 Researchers have developed a method that can reveal the location of errors in quantum computers, making them up to 10 times easier to correct. This will significantly accelerate progress towards large-scale quantum computers capable of tackling the world's most challenging computational problems, the researchers said. https://phys.org/news/2023-10-illuminating-errors-paradigm-quantum.html Quantum Physics Wed, 11 Oct 2023 11:00:01 EDT news616236800 A team of international researchers led by The University of Hong Kong (HKU) and The University of Science and Technology (HKUST) has made a significant discovery in the field of quantum materials, uncovering the controllable nonlinear Hall effect in twisted bilayer graphene. https://phys.org/news/2023-10-physicists-nonlinear-hall-effect-bilayer.html Condensed Matter Quantum Physics Wed, 11 Oct 2023 09:40:03 EDT news616236001 The positron, the antiparticle of the electron, has the same mass and charge as that of an electron but with the sign flipped for the charge. It is an attractive particle for scientists because the use of positrons has led to important insights and developments in the fields of elementary particle physics, atomic physics, materials science, astrophysics, and medicine. https://phys.org/news/2023-10-ionic-crystal-generates-molecular-ions.html General Physics Quantum Physics Tue, 10 Oct 2023 11:12:03 EDT news616155121 Quantum communications have rapidly progressed toward practical, large-scale networks based on quantum key distributions that spearhead the process. Quantum key distribution systems typically include a sender "Alice," a receiver "Bob," who generate a shared secret from quantum measurements for secure communication. Although fiber-based systems are well-suited for metropolitan scale, a suitable fiber infrastructure might not always be in place. https://phys.org/news/2023-10-metropolitan-free-space-quantum-networks.html Optics & Photonics Quantum Physics Tue, 10 Oct 2023 09:29:22 EDT news616148890 A University of Portsmouth physicist has explored whether a new law of physics could support the much-debated theory that we are simply characters in an advanced virtual world. https://phys.org/news/2023-10-law-physics-idea-simulation.html General Physics Quantum Physics Mon, 09 Oct 2023 10:02:12 EDT news616064528 A team of researchers has found a way to speed up the creation of quantum entanglement, a mystifying property of quantum mechanics that Albert Einstein once described as "spooky action at a distance." https://phys.org/news/2023-10-creation-quantum-entanglement.html Quantum Physics Mon, 09 Oct 2023 09:54:11 EDT news616064046 A group of theoretical physicists at Johannes Gutenberg University Mainz (JGU) has once again succeeded in significantly improving their calculations of the electric charge radius of the proton published in 2021. For the first time they obtained a sufficiently precise result completely without the use of experimental data. https://phys.org/news/2023-10-theoretical-physicists-significantly-proton-radius.html General Physics Quantum Physics Fri, 06 Oct 2023 14:28:03 EDT news615821281 In a new Physical Review Letters study, scientists have successfully presented a proof of concept to demonstrate a randomness-free test for quantum correlations and non-projective measurements, offering a groundbreaking alternative to traditional quantum tests that rely on random inputs. https://phys.org/news/2023-10-scientists-semi-device-independent-randomness-free-quantum.html Quantum Physics Fri, 06 Oct 2023 09:20:02 EDT news615802100 A single-atom-thick sheet of carbon known as graphene has remarkable properties on its own, but things can get even more interesting when you stack up multiple sheets. https://phys.org/news/2023-10-quantum-ruler-explore-exotic.html Condensed Matter Quantum Physics Thu, 05 Oct 2023 14:00:02 EDT news615716614 Researchers at the IBS Center for Quantum Nanoscience (QNS) at Ewha Womans University have accomplished a groundbreaking step forward in quantum information science. In partnership with teams from Japan, Spain, and the US, they created a novel electron-spin qubit platform, assembled atom-by-atom on a surface. This breakthrough was published in the journal Science. https://phys.org/news/2023-10-qubit-platform-atom.html General Physics Quantum Physics Thu, 05 Oct 2023 14:00:02 EDT news615716602 A team of scientists at the QOT Centre for Quantum Optical Technologies, including a student from the Faculty of Physics (University of Warsaw), made a device capable of the conversion of quantum information between microwave and optical photons. https://phys.org/news/2023-10-discovery-enable-network-interface-quantum.html Optics & Photonics Quantum Physics Thu, 05 Oct 2023 11:30:04 EDT news615724201