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. Some classical physical systems can explore many configurations over time until their long-term behavior no longer reveals their starting conditions. The sampling of available configurations according to the appropriate statistical distribution is a property called ergodicity. https://phys.org/news/2026-10-quantum-birthmarks.html Quantum Physics Sun, 11 Oct 2026 14:20:01 EDT news710685576 When we think about a diamond, we often think about a material whose value comes from its perfection. In my research, however, I am interested in something almost opposite: the tiny imperfections inside diamonds. These atomic-scale defects can give diamonds new optical and electronic properties, and some of them can serve as quantum systems. The challenge is learning how to control these defects without disturbing the others. https://phys.org/news/2026-10-ultraviolet-laser-pulses-diamond-defects.html Condensed Matter Sat, 10 Oct 2026 17:20:01 EDT news710677572 Most of us recognize basic phases of matter and their properties: solids maintain their shape, liquids flow freely with constant volume, and gases expand to fill their container. Quantum phases, on the other hand, are much harder to categorize, overturning traditional notions of what a phase even is and forcing physicists to rethink their definitions. https://phys.org/news/2026-10-stability-distinguish-quantum-phases-older.html Condensed Matter Sat, 10 Oct 2026 13:00:02 EDT news710683734 Physicists in the Department of Physics at the University of Oxford have used a hybrid quantum computer, made up of qubits and quantum oscillators, to observe the Aharonov–Bohm effect in a quantum simulation. The effect is a quantum phenomenon in which a particle can acquire a measurable phase by traveling around a magnetic flux, even though it never passes through a region where a magnetic field is present. https://phys.org/news/2026-10-hybrid-quantum-foundational-effect.html Quantum Physics Sat, 10 Oct 2026 06:57:07 EDT news710834138 Every black hole hides a question at its center. Einstein's theory predicts that whatever falls in is crushed into a singularity, a point of infinite density where the theory itself breaks down. Most physicists expect quantum gravity to replace that point with something finite. But the center lies hidden behind the horizon. How could we ever learn what is there? https://phys.org/news/2026-10-quantum-cores-fingerprints-black-holes.html General Physics Fri, 09 Oct 2026 17:40:01 EDT news710671667 For highly fragile quantum information systems, the ability to store quantum information is vital—but also challenging. Quantum information is transported in particles of light called photons, which often must be temporarily paused (or "stored") while other, slower quantum operations catch up. This storage must be performed on microchips as small as 1 centimeter (0.4 inches)—a distance covered by light in a few trillionths of a second. Storing photons for a microsecond would represent a massive leap forward for the capabilities of quantum chips. https://phys.org/news/2026-10-quantum-chip-multiple-photons-path.html Optics & Photonics Fri, 09 Oct 2026 13:00:10 EDT news710766541 University of Glasgow researchers are part of an international collaboration that could lead to a new generation of quantum sensors. The team, which included researchers from the University of Tokyo, University of Glasgow, University of Sheffield and Kobe University, has for the first time used light to read out the magnetic spin of electrons trapped inside a porous crystalline material known as a metal-organic framework (MOF). https://phys.org/news/2026-10-electron-porous-crystals-path-quantum.html Condensed Matter Fri, 09 Oct 2026 10:40:09 EDT news710757625 Many fascinating phases in quantum materials emerge when electrons, atoms and other microscopic components begin to act collectively. But these phases do not necessarily appear out of nowhere when a material crosses a transition temperature. Before long-range order develops, microscopic fluctuations can already be present. https://phys.org/news/2026-08-ultrafast-core-spectroscopy-reveals-elusive.html Condensed Matter Fri, 09 Oct 2026 10:14:28 EDT news705922856 Quantum computers, computer systems that leverage the laws of quantum mechanics, store and process information using qubits (i.e., quantum bits). In many quantum computers, qubits are linked via entanglement, a quantum mechanical effect that connects particles in such a way that their shared state cannot be described as separate, independent states. https://phys.org/news/2026-10-superconducting-circuit-links-smaller-photon.html Optics & Photonics Fri, 09 Oct 2026 08:00:06 EDT news710499125 Molecules can be placed in a wide variety of quantum states. How can these states be distinguished in measurements when theoretical models are unreliable? Which excitation process lies behind which measurement signal? https://phys.org/news/2026-10-quantum-individual-molecules.html Quantum Physics Thu, 08 Oct 2026 16:50:02 EDT news710695502 Quantum technologies are considered key technologies of the future. However, research in this field requires not only scientific expertise but sometimes also highly specialized laboratory conditions. Bose–Einstein condensates are a remarkable example, in which atoms move in lockstep, making quantum-mechanical effects visible not only at the level of individual atoms but also on a macroscopic scale. The first Bose–Einstein condensates were observed in ultracold atomic gases at temperatures close to absolute zero. The cooling required to achieve this was technically demanding, costly and restricted to specialized laboratories. https://phys.org/news/2026-10-layered-semiconductor-magnetic-emitted-quantum.html Condensed Matter Thu, 08 Oct 2026 16:00:11 EDT news710679481 In some materials, physical properties don't emerge from their individual particles, but from the collective behavior of their quantum spins. Now, researchers led by Pengcheng Dai at Rice University in the U.S. have discovered that in one compound containing the rare-earth element ytterbium, these spins can behave much like the molecules in a liquid crystal: favoring a certain direction without lining up to create magnetism on larger scales. https://phys.org/news/2026-10-liquid-crystal-magnetism-puzzling-properties.html Condensed Matter Thu, 08 Oct 2026 15:20:15 EDT news710594274 Two studies on critical topology have recently been published in the journal Nature. These studies were led by the teams of Prof. Baile Zhang at Nanyang Technological University, Singapore, and Prof. Jianhua Jiang at the University of Science and Technology of China, respectively. Prof. Xue-Jia Yu from the School of Physics at the Eastern Institute of Technology, Ningbo (EIT), served as a co-corresponding author on both papers and provided key theoretical guidance in the related experimental collaborations. https://phys.org/news/2026-10-acoustic-topology-persist-gapless-critical.html Condensed Matter Wed, 07 Oct 2026 16:40:20 EDT news710599631 Modern technological breakthroughs like lasers, MRI scanners, semiconductors and quantum computers rest on the study of quantum mechanics. However, the field has predominantly focused on (sub)atomic phenomena far removed from our human senses. https://phys.org/news/2026-10-quantum-shifting-centimeter-scale-lab.html General Physics Wed, 07 Oct 2026 14:00:50 EDT news710514722 Today, many physicists are actively exploring how light could be used to link objects through quantum entanglement. By fully harnessing the effect, they hope to unlock a wide array of applications, from secure communication networks spanning vast distances to sensitive new tests of the fundamental laws of physics. https://phys.org/news/2026-10-levitating-glass-sphere-entangled-room.html Optics & Photonics Wed, 07 Oct 2026 12:40:13 EDT news710587355 Collisions between particles at high energies can sometimes produce new particles and shed light on interactions between the fundamental constituents of matter. Simulating these collisions and their underlying processes could yield valuable insights into how matter behaves at extremely small scales. https://phys.org/news/2026-10-quantum-shortcut-particle-collisions-easier.html General Physics Wed, 07 Oct 2026 08:00:01 EDT news710065765 Creating a quantum device often begins by intentionally damaging a crystal. Scientists fire an ultrafast laser pulse into a material, knocking atoms out of place and leaving behind tiny imperfections called vacancies. Far from being flaws, these vacancies can behave as qubits—the fundamental building blocks of quantum information. https://phys.org/news/2026-10-ray-technique-reveals-quantum-materials.html Optics & Photonics Tue, 06 Oct 2026 17:20:08 EDT news710508661 The world would look radically different without rulers and measuring tapes that fit into a pocket. Carpenters, fashion designers and engineers rely on these trusty tools to check the size of everything from a wooden board to a fabric swatch. But physicists who work with light lack that same convenience for one of the basic measurements of their craft. They routinely need to measure and compare the frequencies—colors—of the light waves they are using. https://phys.org/news/2026-10-chip-based-frequency-potential-portable.html Optics & Photonics Tue, 06 Oct 2026 15:00:10 EDT news710504281 A research team led by the University of Osaka has directly observed, for the first time, an unusual heavy-fermion state forming at the boundary between a one-atom-thick material and a metal. Such states are closely linked to exotic quantum phenomena, including unconventional superconductivity, and the finding opens new possibilities for designing quantum materials through their interfaces. https://phys.org/news/2026-10-heavy-fermions-emerge-atomic-layer.html Condensed Matter Tue, 06 Oct 2026 11:00:24 EDT news710498582 Black holes, despite their extreme nature, are described by surprisingly few basic parameters: their mass, charge and spin. Two black holes may have formed for completely different reasons and passed through very different histories, yet still end up in the same final state. John Wheeler summarized this idea with the famous phrase "black holes have no hair." https://phys.org/news/2026-10-black-hole-disturbance-hawking.html General Physics Tue, 06 Oct 2026 10:00:01 EDT news710416753 Even the most chaotic quantum systems keep a permanent mark of their own past—a "quantum birthmark"—that never fades. Researchers from Tampere University, Harvard University and TU Dresden discovered the feature in their recent study. Their findings shed new light on the elusive relationship between classical and quantum mechanics. Looking ahead, these quantum birthmarks, along with related phenomena known as "scars," could eventually be harnessed to power next-generation nanoelectronics. https://phys.org/news/2026-10-quantum.html General Physics Mon, 05 Oct 2026 16:00:13 EDT news710425290 Many complex quantum systems rapidly lose the recognizable patterns of their initial states as their components interact. To describe patterns of regular and chaotic motion in specific systems, physicists can construct a mathematical map called an effective phase space. https://phys.org/news/2026-09-scientists-uncover-recurrent-patterns-chaotic.html General Physics Mon, 05 Oct 2026 08:00:04 EDT news709981266 When I explain topology to students, I start with a knot in a rope. You can stretch it, twist it or shake it, but the knot stays until you cut the rope. Physicists have found that some materials and devices carry similar "knots" in how waves move through them. These are topological properties, labeled by whole numbers that don't change under small imperfections. That robustness is why topology has become one of the central ideas in modern physics. It promises electronics, photonics and quantum devices that tolerate defects and noise. https://phys.org/news/2026-10-hidden-topology-energy-leaks.html Optics & Photonics Sat, 03 Oct 2026 13:40:01 EDT news710151198 Once called a "pipe dream," quantum computers are now approaching practical use. Companies and research institutes around the world are in fierce competition to develop this technology, which has the potential to rapidly perform some calculations that are extremely difficult even for conventional supercomputers. https://phys.org/news/2026-10-qa-quantum-society.html Quantum Physics Fri, 02 Oct 2026 14:20:08 EDT news710159341 Working in close collaboration, researchers from Paderborn University, the University of Basel and Ruhr University Bochum have made a breakthrough in quantum communication. In their recently published paper in the journal Physical Review Letters, they demonstrate how special semiconductor nanostructures can be used to generate individual photons and pairs of photons that are almost perfectly identical. These "indistinguishable" particles form the basis for quantum entanglement and quantum interference. https://phys.org/news/2026-10-method-generates-indistinguishable-photons-quantum.html Optics & Photonics Thu, 01 Oct 2026 17:40:10 EDT news710077741 Quantum technologies rely on qubits, units of information that can exist in combinations of the states 0 and 1 instead of being limited to one or the other like conventional bits. Qubits can become entangled, which means their states become linked in ways that cannot be explained by considering each qubit separately. https://phys.org/news/2026-09-parallel-gate-entangles-diamond-qubits.html Condensed Matter Thu, 01 Oct 2026 08:40:16 EDT news709820817 By superimposing two ultrashort laser pulses that converge from different directions, a team of physicists at the University of Oldenburg has succeeded in generating three-dimensional light fields. https://phys.org/news/2026-09-3d-fields-electrons-quantum-states.html Optics & Photonics Wed, 30 Sep 2026 13:40:26 EDT news709983422 Researchers at Tohoku University, in collaboration with the National Institute for Materials Science (NIMS) and the University of Tokyo, have taken an important step toward semiconductor quantum computing using zinc oxide (ZnO). https://phys.org/news/2026-09-zinc-oxide-quantum-dots-enable.html Condensed Matter Wed, 30 Sep 2026 13:20:11 EDT news709981741 Most magnets have two poles: north and south, or positive and negative, in a familiar arrangement called a "dipole." But researchers are increasingly uncovering more complex forms of magnetism. https://phys.org/news/2026-09-physicists-octupolar-magnetism-implications-quantum.html Condensed Matter Wed, 30 Sep 2026 10:40:25 EDT news709975981 In materials chemistry, identifying common parameters that can organize magnetic ground states across complex intermetallic compounds remains a central challenge. Researchers have long used chemically tunable parameters to control magnetic properties. One is valence-electron concentration, commonly discussed as the electron-per-atom (e/a) ratio. The e/a ratio has been widely used to classify magnetic ground states in metallic systems such as Heusler alloys and approximant crystals. https://phys.org/news/2026-09-crystal-spacing-magnetic-states-complex.html Condensed Matter Wed, 30 Sep 2026 00:00:02 EDT news709895521