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. Researchers from Jülich, Aachen and Cologne have performed a quantum operation on a qubit in just 6.8 nanoseconds—with more than 99.98% accuracy. Such operations typically take several tens of nanoseconds in superconducting quantum computers. The paper was published in Nature Communications. https://phys.org/news/2026-10-quantum-gates-nanoseconds-accuracy.html Optics & Photonics Tue, 27 Oct 2026 14:40:12 EDT news712317781 Adelaide University quantum engineers have found a new way to improve some of the world's most sensitive sensors of electromagnetic fields, a breakthrough that could help advance brain imaging, medical diagnostics, communications technology and next-generation quantum devices. https://phys.org/news/2026-10-quantum-sensor-loop-magnetic-medicine.html Superconductivity Tue, 27 Oct 2026 13:40:06 EDT news712316102 Quantum networks, systems that connect devices using quantum mechanical effects, could potentially allow users to share information more securely and efficiently. Building these networks typically entails linking stationary qubits, units of quantum information encoded in trapped ions or other physical systems, using photons (particles of light) transmitted through optical fibers. https://phys.org/news/2026-10-bridge-wavelength-gap-quantum-communications.html Optics & Photonics Tue, 27 Oct 2026 08:40:01 EDT news711967827 For the first time, researchers in Japan have directly mapped several components of the stress field surrounding an atomic-scale flaw in the crystal structure of diamond. Led by Tokuyuki Teraji at Japan's National Institute for Materials Science, the team achieved its result using nitrogen-vacancy (NV) centers in diamond, whose spin states respond differently to stress depending on how they are oriented relative to the stress field. https://phys.org/news/2026-10-diamond-defects-year-theory-crystal.html Condensed Matter Mon, 26 Oct 2026 10:30:01 EDT news712229116 Quantum computers need qubits that can be controlled both quickly and reliably. Yet making semiconductor spin qubits faster often makes them more sensitive to electrical noise, creating a difficult trade-off. https://phys.org/news/2026-10-extra-quantum-dot-stability-qubits.html Condensed Matter Mon, 26 Oct 2026 09:40:06 EDT news712224061 One of the fundamental challenges of quantum computing is obtaining information from a quantum bit, or qubit. Unlike a conventional bit, which can be read repeatedly without altering its content, direct measurement of a quantum system typically causes the state to collapse before it can be determined. In other words, reading the information modifies it. https://phys.org/news/2026-10-supercurrent-enables-quantum-destroying.html Superconductivity Sun, 25 Oct 2026 15:00:20 EDT news711982659 The positron is the antimatter counterpart of the electron, identical in mass but carrying an equal and opposite electric charge. Like the electron, it also behaves like a tiny bar magnet, and according to a key prediction of the Standard Model of particle physics, its magnetic moment should be exactly equal and opposite to the electron's. https://phys.org/news/2026-10-positron-cyclotron-key-standard.html General Physics Sat, 24 Oct 2026 13:20:02 EDT news711890804 Researchers at AIST have directly observed magnetic flux quanta generated in a superconductor by photon absorption and demonstrated a new principle of photon detection that identifies the number of photons based on the number of these flux quanta. https://phys.org/news/2026-10-magnetic-flux-quanta-photon.html Optics & Photonics Fri, 23 Oct 2026 17:20:02 EDT news711982021 Quantum systems can occupy superpositions, quantum states that combine different possibilities. For instance, a microwave field can be prepared in a superposition of an empty state and a state that contains microwave light. https://phys.org/news/2026-10-quantum-cat-states.html Quantum Physics Fri, 23 Oct 2026 08:40:02 EDT news711719213 Researchers at Fraunhofer IAF have developed a laser-enhanced quantum sensor that combines high magnetic-field sensitivity with a large dynamic range. Using laser threshold magnetometry, they improved the ratio of sensitivity and dynamic range by a factor of up to 590 compared with state-of-the-art approaches. The breakthrough is enabled by the first demonstration of 100% optical contrast, combined with strong laser readout signals. The results, published in Nature Communications, open up new prospects for medical diagnostics, navigation, and resource exploration. https://phys.org/news/2026-10-diamond-laser-optical-contrast-magnetic.html Optics & Photonics Thu, 22 Oct 2026 14:20:08 EDT news711893942 Ever since quantum mechanics first described particles, like electrons, as rippling waves, researchers have wondered if those waves could be trapped in place. Writing today in Science a century later, a team of Columbia University researchers reports waves of electrons becoming trapped for the first time in a metal called Pd₅AlI₂. https://phys.org/news/2026-10-quantum-electron-metal.html Condensed Matter Thu, 22 Oct 2026 14:00:18 EDT news711812644 Unlike classical physics, quantum mechanics generally cannot tell us exactly what will happen in an individual event. Instead, it predicts the probabilities of different outcomes. As one of the theory's early pioneers, Erwin Schrödinger played a key role in debates about what this randomness really means. However, part of his contribution has stayed hidden for more than 80 years. https://phys.org/news/2026-10-lost-schrdinger-manuscript-reveals-true.html Quantum Physics Thu, 22 Oct 2026 09:00:01 EDT news711806228 Scientists from the Quantum Technologies Group at the Institute of Physics Zagreb, in collaboration with a colleague from the Physics Department at the Faculty of Science (PMF), have experimentally demonstrated for the first time the existence of discrete one-dimensional (1D) solitons in an optically induced photonic lattice in warm rubidium vapor. https://phys.org/news/2026-10-laser-lattice-reveals-discrete-solitons.html Optics & Photonics Wed, 21 Oct 2026 18:20:07 EDT news711813961 For the first time, Northwestern University physicists have coaxed a single positron—the antimatter counterpart of an electron—into an exquisitely controlled quantum state. https://phys.org/news/2026-10-physicists-particle-antimatter-months.html General Physics Wed, 21 Oct 2026 11:00:10 EDT news711713041 Quantum networks, systems that connect devices and allow them to exchange information encoded in the quantum states of particles, could enable more secure communications. To build these networks, physicists need to devise strategies that allow distant particles to share quantum states, preserving them long enough to perform calculations or enable communication between devices. https://phys.org/news/2026-10-atomic-memory-distant-ions-entangled.html Optics & Photonics Wed, 21 Oct 2026 07:40:12 EDT news711706392 Transmitting electricity without losing any energy may sound impossible, yet this is precisely the promise of superconductivity. For nearly 40 years, scientists have been working to understand materials that exhibit this remarkable property at relatively high temperatures. Unlocking their secrets could one day help make power grids more efficient, enhance medical technologies and support the development of quantum computing. https://phys.org/news/2026-10-hidden-rivalry-quantum-states-heart.html Superconductivity Tue, 20 Oct 2026 18:00:07 EDT news711721321 Light is one of the most powerful tools scientists have for probing matter. By interacting with electrons, light reveals how atoms, molecules and materials are structured and how they evolve in time. Highly energetic ultraviolet and X-ray photons are particularly attractive because they can access electrons located close to atomic nuclei, where each chemical element carries its own distinctive electronic fingerprint. https://phys.org/news/2026-10-electrons-extreme-ultraviolet-team-quantum.html Optics & Photonics Tue, 20 Oct 2026 14:00:31 EDT news711713761 Tiny atoms and molecules are constantly bombarding each other all around us. While we regularly measure the large-scale effects of these interactions, measuring the effect of each individual collision is far more difficult. But now, researchers have managed to measure how tiny gas particles affect a single silica particle in the lab. In their new study, published in Physical Review Letters, the team describes how they detected the momentum transfers of individual collisions of gas particles with a nanoparticle levitated in laser light. https://phys.org/news/2026-10-individual-atomic-collisions-lab-potentially.html General Physics Tue, 20 Oct 2026 13:10:01 EDT news711719258 For nearly a century, physicists have relied on the Born rule to calculate the chances of different outcomes when they measure a quantum system. Yet despite decades of effort, nobody has managed to derive the rule from more basic mathematical principles without making assumptions about probability along the way. https://phys.org/news/2026-10-quantum-probability-derived-assuming.html Quantum Physics Tue, 20 Oct 2026 11:50:01 EDT news711713510 For scientists, breakthroughs often stem from unexpected turns. A research team led by Oscar Dahlsten, an associate professor in the Department of Physics at City University of Hong Kong (CityUHK), set out to prove a theoretical limitation, only to discover a quantum solution. The finding breaks traditional physical constraints and introduces a strategy for harvesting energy from fluctuating sources. https://phys.org/news/2026-10-quantum-pathway-entropy-free-energy.html General Physics Tue, 20 Oct 2026 11:00:01 EDT news711706981 Voltage fluctuations, light fluctuations, temperature fluctuations—any fluctuations are troublesome and thus undesirable. They don't just cause discomfort; in engineering and medical applications, they affect the accuracy of measurements or introduce errors in controls. Even at the minute level of quantum phenomena, fluctuations are considered undesirable. https://phys.org/news/2026-10-forbidden-emissions-graphene-expose-quantum.html Optics & Photonics Mon, 19 Oct 2026 13:40:04 EDT news711626341 Today's computer technology, based on silicon chips, is slowly reaching its physical limits. Components cannot be miniaturized indefinitely, and clock speeds cannot be increased indefinitely. At the same time, huge AI data centers are being built in many places, and these consume an immense amount of electricity. This is why scientists around the world are searching for novel materials that can replace or complement silicon technology and consume significantly less electricity. https://phys.org/news/2026-10-rays-reveal-copper-oxide.html Condensed Matter Mon, 19 Oct 2026 11:40:06 EDT news711621013 Some quantum systems are so complex that even the most powerful supercomputers struggle to simulate their behavior. One solution is quantum simulation: building a controllable quantum system in the lab and tuning it to mimic the one researchers want to understand. https://phys.org/news/2026-10-monolithic-ion-quantum-simulations.html General Physics Sun, 18 Oct 2026 14:00:06 EDT news711191698 Whether we are waiting for a car windshield to defrost in winter or a warm drink to cool down, how long it takes for an object to settle into a stable, even temperature within its environment (thermal equilibrium) depends on numerous factors. These can include surface area, the material properties of an object and airflow. https://phys.org/news/2026-10-physicists-quantum-limit-thermalization.html General Physics Sun, 18 Oct 2026 13:20:01 EDT news711375948 Researchers have developed and demonstrated a new hybrid photonic platform that integrates quantum emitters with photonic devices, providing a way to reliably control the interaction between photons and quantum information carriers. The chip-based platform, which combines gallium phosphide (GaP) with a diamond substrate, could help make quantum networks more practical by providing a way to connect quantum devices over long distances. https://phys.org/news/2026-10-hybrid-diamond-chip-interactions-quantum.html Optics & Photonics Sun, 18 Oct 2026 09:00:05 EDT news711300067 Qubits, the quantum equivalent of digital bits, are fragile and prone to errors. That makes building reliable quantum computers extremely difficult. One fix has been to use traditional magic state distillation, which filters out flaws, but it is extremely resource-intensive. https://phys.org/news/2026-10-quantum-magic-state-cleanup-errors.html Quantum Physics Sat, 17 Oct 2026 14:00:02 EDT news711367172 Quantum computers represent a next step in the fast-paced evolution of technology. Using quantum bits (qubits), they have the potential to run certain calculations exponentially faster than conventional computers. However, developing and fine-tuning quantum computers requires an enormous number of repetitive tests. To accelerate quantum technology development, we need a method that can read quantum states at ultrafast speeds. https://phys.org/news/2026-10-high-frequency-method-boosts-2d.html Quantum Physics Fri, 16 Oct 2026 18:00:01 EDT news711373496 For the first time, scientists have achieved strong coupling between light and long-lived acoustic vibrations in an optical fiber. Optical fibers are used in both classical telecommunications and quantum communication and could serve not only as connections between computing nodes but also as quantum processors themselves in the future. The results, published in Nature Physics, pave the way for new technologies in quantum signal processing. https://phys.org/news/2026-10-highway-racetrack-strong-coupling-optical.html Optics & Photonics Fri, 16 Oct 2026 17:20:01 EDT news711373441 The researchers in the Quantum Detection Microscopy group at CIC nanoGUNE, in collaboration with chemists at CiQUS of the University of Santiago de Compostela, have demonstrated that adding or removing a single molecule from a quantum chain can fundamentally change its interaction with a superconductor. https://phys.org/news/2026-10-odd-molecule-difference-quantum-world.html Superconductivity Fri, 16 Oct 2026 10:20:06 EDT news711362070 Silicon spin qubits are a promising platform for building scalable quantum computers as they are compatible with the semiconductor manufacturing technologies used to produce today's computer chips. However, they have an important weakness: silicon spin qubits typically lose accuracy when several qubits are under parallel control. To be useful, quantum computers will need to operate many qubits simultaneously without compromising the accuracy of their operations. https://phys.org/news/2026-10-silicon-qubits-surpass-gate-fidelity.html Quantum Physics Thu, 15 Oct 2026 17:20:05 EDT news711293821