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. Rice University physicists have shown that immutable topological states, which are highly sought for quantum computing, can be entangled with other manipulable quantum states in some materials. https://phys.org/news/2023-08-materials-immutable-topological-states-entangled.html General Physics Quantum Physics Wed, 02 Aug 2023 16:10:29 EDT news610211424 A collaboration of nuclear theorists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory, Argonne National Laboratory, Temple University, Adam Mickiewicz University of Poland, and the University of Bonn, Germany, has used supercomputers to predict the spatial distributions of charges, momentum, and other properties of "up" and "down" quarks within protons. The results, just published in Physical Review D, revealed key differences in the characteristics of the up and down quarks. https://phys.org/news/2023-08-reveal-high-resolution-view-quarks-protons.html Quantum Physics Wed, 02 Aug 2023 13:18:35 EDT news610201107 A common metal paper clip will stick to a magnet. Scientists classify such iron-containing materials as ferromagnets. A little over a century ago, physicists Albert Einstein and Wander de Haas reported a surprising effect with a ferromagnet. If you suspend an iron cylinder from a wire and expose it to a magnetic field, it will start rotating if you simply reverse the direction of the magnetic field. https://phys.org/news/2023-08-scientists-unusual-ultrafast-motion-layered.html Condensed Matter Quantum Physics Wed, 02 Aug 2023 13:17:30 EDT news610201043 Electronic devices typically use the charge of electrons, but spin—their other degree of freedom—is starting to be exploited. Spin defects make crystalline materials highly useful for quantum-based devices such as ultrasensitive quantum sensors, quantum memory devices, or systems for simulating the physics of quantum effects. Varying the spin density in semiconductors can lead to new properties in a material—something researchers have long wanted to explore—but this density is usually fleeting and elusive, thus hard to measure and control locally. https://phys.org/news/2023-08-microscopic-density-materials.html Condensed Matter Quantum Physics Wed, 02 Aug 2023 10:39:34 EDT news610191567 The road to a quantum future may be longer and more winding than some expect, but the potential it holds is profound, writes UTS Associate Professor Chris Ferrie. https://phys.org/news/2023-08-quantum.html Quantum Physics Wed, 02 Aug 2023 07:55:38 EDT news610181731 Quantum field theory is a framework used by physicists to describe a wide range of phenomena in particle physics and is an effective tool to deal with complicated many-body problems or interacting systems. https://phys.org/news/2023-08-many-body-interactions-thermal-field-theory.html Quantum Physics Wed, 02 Aug 2023 07:52:12 EDT news610181528 Optical phase retrieval and imaging appear in a wide variety of science fields, such as imaging of quasi-transparent biological samples or nanostructures metrological characterization, for example, in the semiconductor industry. At a fundamental level, the limit to imaging accuracy in classical systems comes from the intrinsic fluctuation of the illuminating light, since the photons that form it are emitted randomly by conventional sources and behave independently of one another. https://phys.org/news/2023-08-quantum-enhanced-non-interferometric-quantitative-phase-imaging.html Optics & Photonics Quantum Physics Tue, 01 Aug 2023 17:10:01 EDT news610128022 An international team of physicists has found that deep-learning AI technology can accurately quantify the amount of entanglement in a given system—prior research has shown that the degree of "quantumness" of a given system can be described by a single number. In their paper, published in the journal Science Advances, the group describes their technique and how well it worked when tested in a real-world environment. https://phys.org/news/2023-08-ai-accurately-quantify-amount-entanglement.html Quantum Physics Tue, 01 Aug 2023 09:27:03 EDT news610100819 Everyday life involves the three dimensions (3D), along an X, Y and Z axis, or up and down, left and right, and forward and back. But in recent years scientists, like Guoliang Huang, the Huber and Helen Croft Chair in Engineering at the University of Missouri, have explored a "fourth dimension" (4D), or synthetic dimension, as an extension of our current physical reality. https://phys.org/news/2023-07-scientists-approach-energy-4d.html Condensed Matter Quantum Physics Mon, 31 Jul 2023 14:53:02 EDT news610033981 Quantum memory that depends on quantum-band integration is a key building block used to develop quantum networks that are compatible with fiber communication infrastructures. Quantum engineers and IT specialists have yet to create such a network with large capacity to form an integrated multimode photonic quantum memory at telecom band. https://phys.org/news/2023-07-telecom-band-integrated-multimode-photonic-quantum-memory.html Optics & Photonics Quantum Physics Mon, 31 Jul 2023 13:10:54 EDT news610027848 Many substances change their properties when they are cooled below a certain critical temperature. Such a phase transition occurs, for example, when water freezes. However, in certain metals there are phase transitions that do not exist in the macrocosm. They arise because of the special laws of quantum mechanics that apply in the realm of nature's smallest building blocks. https://phys.org/news/2023-07-electrons-slowly-cooling-effect-unique.html Condensed Matter Quantum Physics Mon, 31 Jul 2023 11:58:04 EDT news610023482 A long-standing challenge in the field of quantum physics is the efficient synchronization of individual and independently generated photons (i.e., light particles). Realizing this would have crucial implications for quantum information processing that relies on interactions between multiple photons. https://phys.org/news/2023-07-team-synchronizes-photons-atomic-quantum.html Optics & Photonics Quantum Physics Sun, 30 Jul 2023 09:10:01 EDT news609674506 The CMS collaboration has recently presented new results in searches for long-lived heavy neutral leptons (HNLs). Also known as "sterile neutrinos", HNLs are interesting hypothetical particles that could solve three major puzzles in particle physics: they could explain the smallness of neutrino masses via the so-called "see-saw" mechanism, they could explain the matter-antimatter asymmetry of the universe, and at the same time they could provide a candidate for dark matter. https://phys.org/news/2023-07-sterile-neutrinos-cms-muon.html General Physics Quantum Physics Fri, 28 Jul 2023 14:06:50 EDT news609772008 Using ultra-high-precision laser spectroscopy on a simple molecule, a group of physicists led by Professor Stephan Schiller Ph.D. from Heinrich Heine University Düsseldorf (HHU) has measured the wave-like vibration of atomic nuclei with an unprecedented level of precision. https://phys.org/news/2023-07-atomic-nuclei-vibrate-greater-degree.html Quantum Physics Fri, 28 Jul 2023 11:57:43 EDT news609764260 Dr. Carlo Cafaro, SUNY Poly faculty in the Department of Mathematics and Physics, has collaborated with Dr. Paul M. Alsing, Principal Research Physicist at the Air Force Research Laboratory in Rome, NY, on work published in The European Physical Journal Plus. https://phys.org/news/2023-07-bures-sjqvist-metrics-thermal-state.html Quantum Physics Fri, 28 Jul 2023 10:12:02 EDT news609757921 "Plasma wakefield acceleration is like surfing," says Edda Gschwendtner, leader of the AWAKE accelerator R&D project at CERN. https://phys.org/news/2023-07-stronger-particles.html Plasma Physics Quantum Physics Thu, 27 Jul 2023 16:56:28 EDT news609695782 What plagues quantum upscaling? Most quantum computing devices are dependent on using complex physical phenomena that are either very short-lived (~10-12 seconds) and/or only survive at ultra-low temperatures (e.g., 10-3 to 10-6 Kelvin) and/or require ultra-high vacuum environments, except possibly those using nitrogen vacancy centers in diamonds or color centers in silicon, silicon carbide, etc. https://phys.org/news/2023-07-tailoring-quantum-oscillations-bose-einstein-condensate.html Condensed Matter Quantum Physics Thu, 27 Jul 2023 14:54:54 EDT news609688486 Some of our most important everyday items, such as computers, medical equipment, stereos, generators, and more, work because of magnets. We know what happens when computers become more powerful, but what might be possible if magnets became more versatile? What if one could change a physical property that defined their usability? What innovation might that catalyze? https://phys.org/news/2023-07-anomalous-hall-effect-berry-curvature.html Condensed Matter Quantum Physics Wed, 26 Jul 2023 10:25:57 EDT news609585953 Looking only at their subatomic particles, most materials can be placed into one of two categories. https://phys.org/news/2023-07-quantum-avalanche-nonconductors-conductors.html Condensed Matter Quantum Physics Mon, 24 Jul 2023 17:02:27 EDT news609436937 Quantum teleportation allows quantum information to be transferred to a remote location by using quantum entanglement and classical communication. It has been achieved with varying rates of independent photons of quantum light, from tabletop experiments to real-world demonstrations. https://phys.org/news/2023-07-team-boosts-metropolitan-quantum-teleportation.html Optics & Photonics Quantum Physics Mon, 24 Jul 2023 16:55:12 EDT news609436508 Albert Einstein's general theory of relativity is a landmark in our understanding of the universe. It gave rise to the notion of a spacetime continuum against which all physical phenomena play out. But over the decades, it has inspired many questions that have yet to be answered: How can Einstein's equations describe forces other than gravity? And what are the "dark" forms of energy and matter that cause the universe to expand and galaxies to evolve? https://phys.org/news/2023-07-combining-continuum-mechanics-einstein-field.html Quantum Physics Mon, 24 Jul 2023 12:20:39 EDT news609420037 In a recent publication in the journal Advanced Materials Interfaces, the research team led by first author Dr. Philip Schädlich, a research associate at the Professorship of Experimental Physics, presents a method for the detailed structural analysis of synthesized two-dimensional lead layers on a specially manufactured system for the first time. https://phys.org/news/2023-07-monoatomic-layers-specially-method.html Condensed Matter Quantum Physics Mon, 24 Jul 2023 10:36:40 EDT news609413772 In the 11 years since its discovery at the Large Hadron Collider (LHC), the Higgs boson has become a central avenue for shedding light on the fundamental structure of the universe. Precise measurements of the properties of this special particle are among the most powerful tools physicists have to test the Standard Model, currently the theory that best describes the world of particles and their interactions. At the Lepton Photon Conference this week, the ATLAS collaboration reported how it has measured the mass of the Higgs boson more precisely than ever before. https://phys.org/news/2023-07-atlas-precision-higgs-boson-mass.html General Physics Quantum Physics Fri, 21 Jul 2023 13:32:02 EDT news609165121 The discovery of the Higgs Boson in 2012 represented a major turning point for particle physics marking the completion of what is known as the standard model of particle physics. Yet, the standard model can't answer every question in physics, thus, since this discovery at the Large Hadron Collider (LHC) physicists have searched for physics beyond the standard model and to determine what shape future physics will take. https://phys.org/news/2023-07-particle-era-physics.html General Physics Quantum Physics Thu, 20 Jul 2023 12:15:17 EDT news609074114 Quantum technologies, a wide range of devices that operate by leveraging the principles of quantum mechanics, could significantly outperform classical devices on some tasks. Physicists and engineers worldwide have thus been working hard to achieve this long-sought "quantum advantage" over classical computing approaches. https://phys.org/news/2023-07-quantum-radar-outperforms-classical.html General Physics Quantum Physics Thu, 20 Jul 2023 09:10:01 EDT news609062270 Nearly a century ago, physicists Max Born and J. Robert Oppenheimer developed an assumption regarding how quantum mechanics plays out in molecules, which are comprised of intricate systems of nuclei and electrons. The Born-Oppenheimer approximation assumes that the motion of nuclei and electrons in a molecule are independent of each other and can be treated separately. https://phys.org/news/2023-07-unveiling-quantum-reveal-nexus-vibrational.html Optics & Photonics Quantum Physics Wed, 19 Jul 2023 12:37:01 EDT news608989017 Since the realization that a linearly polarized light can create K-K' valley coherent excitons in monolayer transition metal dichalcogenide (TMDC) semiconductors back in 2013, it has been a longstanding goal for researchers to use these excitonic states for coherent manipulation and qubit operation. https://phys.org/news/2023-07-solution-longstanding-problem-ultrafast-valley.html Optics & Photonics Quantum Physics Wed, 19 Jul 2023 10:30:32 EDT news608981427 A team led by Prof. Li Chuanfeng and Prof. Xu Jinshi from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS), collaborating with Prof. Chen Jingling from Nankai University and Prof. Adán Cabello from the University of Seville, studied the single-system version of multipartite Bell nonlocality, and observed the highest degree of quantum contextuality in single system. Their work was published in Physical Review Letters. https://phys.org/news/2023-07-strongest-quantum-contextuality.html Quantum Physics Wed, 19 Jul 2023 09:38:03 EDT news608978281 A team led by Prof. Guo Guoping and Prof. Cao Gang from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS), collaborating with Sigmund Kohler from Materials Science Institute of Madrid, have developed a response theory applicable to strongly coupled and multiqubit systems. Their study was published in Physical Review Letters. https://phys.org/news/2023-07-theory-periodically-driven-quantum-dotcavity.html Condensed Matter Quantum Physics Tue, 18 Jul 2023 11:26:02 EDT news608898361 Researchers from the Center of Theoretical Physics of Complex Systems within the Institute for Basic Science (PCS-IBS) made an important discovery that describes the relationship between synchronization and thermodynamics in quantum systems. https://phys.org/news/2023-07-unveiling-synchronization-quantum-thermal-machines.html Quantum Physics Tue, 18 Jul 2023 10:54:28 EDT news608896465