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. Quantum information is notoriously fragile. Internet traffic is anything but. Yet Northwestern University scientists have demonstrated they can peacefully coexist inside the same fiber-optic cable. https://phys.org/news/2026-07-quantum-internet-lab-real-world.html Optics & Photonics Wed, 22 Jul 2026 18:40:01 EDT news703948921 In recent years, research using artificial intelligence to predict material properties has advanced rapidly. Neural network quantum Monte Carlo methods have attracted attention as highly accurate simulation techniques. However, their extremely high computational cost has limited their application to small molecular systems. This study introduces a new computational method that overcomes this limitation. https://phys.org/news/2026-07-neural-networks-larger-quantum-simulations.html Quantum Physics Wed, 22 Jul 2026 16:40:07 EDT news703946701 Our bodies generate extremely weak magnetic fields as electric currents flow through the heart, brain and other tissues. These signals are used in magnetocardiography and magnetoencephalography to assess heart function and brain activity, respectively. These fields can be detected at room temperature using diamond sensors containing nitrogen-vacancy (NV) centers, in which a carbon atom is replaced by a nitrogen atom adjacent to an empty lattice site. https://phys.org/news/2026-07-body-magnetic-fields-power-ramsey.html Optics & Photonics Wed, 22 Jul 2026 16:40:06 EDT news703947302 Many modern technologies, from optical communications and artificial intelligence (AI) hardware to advanced sensors and medical imaging, depend on photonic and semiconductor devices that precisely control the interaction between light and electrons. Designing these devices, however, remains a major challenge because existing simulation tools often require researchers to choose between modeling an entire device or capturing the detailed behavior of electrons. Few can do both within the same model. https://phys.org/news/2026-07-simulation-tool-generation-photonic-quantum.html Quantum Physics Wed, 22 Jul 2026 08:40:02 EDT news703923302 Quantum networks, systems consisting of multiple connected nodes or devices that can transmit quantum information to one another, have the potential to advance future communications. These networks typically leverage entanglement, a quantum phenomenon that prompts two or more distant particles to become highly correlated, so that measuring one instantly affects the state of the other. https://phys.org/news/2026-07-multiplexing-scheme-distance-quantum-communication.html Quantum Physics Wed, 22 Jul 2026 06:20:01 EDT news703772263 Artificial intelligence faces an energy crisis stemming from a physical traffic jam inside modern computer chips. Processors must continually shuffle data, such as the billions of parameters in complex models, between separate computing and memory nodes. This traffic jam, known as the "von Neumann bottleneck," hinders the speed and energy efficiency of advanced processors. https://phys.org/news/2026-07-quantum-microscope-illuminates-transistor.html Condensed Matter Tue, 21 Jul 2026 16:20:11 EDT news703858561 One of the deepest ambitions in modern physics is understanding how the fabric of space and time could emerge from fundamental quantum degrees of freedom to establish a quantum theory of gravity. https://phys.org/news/2026-07-quantum-error-emergent-gravity-probing.html General Physics Tue, 21 Jul 2026 11:10:02 EDT news703850636 The inevitable leakage of energy and information from a quantum system into its surrounding environment is the enemy of quantum technology. Now, researchers have demonstrated that it can be exploited to generate entanglement—the "resource" that quantum technologies use to perform tasks inaccessible to standard classical technologies. https://phys.org/news/2026-07-quantum-entanglement-leaky-qubits-route.html Quantum Physics Sun, 19 Jul 2026 14:20:01 EDT news703687891 Quantum computers, devices that process information by leveraging the laws of quantum mechanics, have been found to outperform classical computers in some advanced tasks. Instead of storing information in the form of classical binary bits (i.e., 0 or 1), quantum computers rely on quantum bits (i.e., qubits), which can also exist in combinations of 0 and 1 states. https://phys.org/news/2026-07-quantum-circuits-based-neutral-atoms.html General Physics Sat, 18 Jul 2026 09:20:01 EDT news703232840 A technology has been developed that allows artificial intelligence to inversely determine the process conditions for quantum-dot light-emitting diode (QLED) devices—conditions that previously required extensive trial and error to identify. https://phys.org/news/2026-07-ai-qled-recipe-efficiency-boosts.html Optics & Photonics Sat, 18 Jul 2026 08:00:09 EDT news703512040 A new study by Queen Mary University of London mathematician Professor Ginestra Bianconi proposes a new perspective on one of the deepest questions in modern physics: How can the universe become increasingly structured and complex while still obeying the second law of thermodynamics? https://phys.org/news/2026-07-gravity-entropy-theory-law-thermodynamics.html General Physics Fri, 17 Jul 2026 15:00:01 EDT news703512912 Quantum computers, systems that process information using the principles of quantum mechanics, could solve some problems that cannot be tackled by the classical computers currently used worldwide. Despite their potential, verifying that these computers are working correctly and can reliably perform computations remains challenging. https://phys.org/news/2026-07-scheme-gates-quantum-devices.html Quantum Physics Fri, 17 Jul 2026 09:20:11 EDT news703232854 Graphene has long been regarded as one of the most promising materials for future electronics, but its relatively weak electron interactions have limited its potential for applications such as high-temperature superconductivity. Now, researchers from Tohoku University have overcome a major obstacle by creating a stable version of the long-sought "boron graphene" on the surface of a three-dimensional crystal, revealing a new quantum state that could lead to more energy-efficient electronic devices. The findings were published in Science Advances on July 2, 2026. https://phys.org/news/2026-07-scientists-stable-boron-graphene-uncover.html Condensed Matter Thu, 16 Jul 2026 12:20:10 EDT news703407615 Researchers from the University of Basel have published details of how electrons within a cluster of molecules interact with one another and can be controlled. Their findings pave the way for new approaches to developing quantum components and electronic circuits on the nanometer scale. https://phys.org/news/2026-07-schrdingerlike-sixmolecule-clusters-quantum-components.html Quantum Physics Thu, 16 Jul 2026 11:40:13 EDT news703407232 Quantum technologies promise revolutionary advances in computing, sensing and information processing. However, controlling individual quantum bits (qubits) at the atomic scale remains a major challenge because conventional approaches rely on magnetic fields, which are difficult to confine to a single molecule. https://phys.org/news/2026-07-scientists-electrical-molecule-quantum-states.html Quantum Physics Thu, 16 Jul 2026 09:30:03 EDT news703407599 Theoretical physicists at Johannes Gutenberg University Mainz (JGU) have developed a new method of ordering Feynman integrals. This critical step in making theoretical predictions for high-energy precision measurements has posed a major computational bottleneck until now. https://phys.org/news/2026-07-library-feynman.html General Physics Thu, 16 Jul 2026 09:20:05 EDT news703405367 A truly useful quantum computer must be able to run any algorithm, with the same versatility an ordinary laptop offers. Physicists have now shown a new way to give a quantum computer exactly that flexibility, harnessing the capabilities of exotic quantum particles called non-Abelian anyons. https://phys.org/news/2026-07-braided-exotic-particles-reliable-universal.html Quantum Physics Thu, 16 Jul 2026 08:50:01 EDT news703406691 Quantum technologies, which leverage the principles of quantum mechanics, have been found to outperform their classical counterparts on specific tasks. Among other things, past studies have highlighted the potential of quantum systems that can enable long-distance communication, using photons (i.e., particles of light) to carry quantum information. https://phys.org/news/2026-07-quantum-teleportation-photon-loss-distance.html Optics & Photonics Thu, 16 Jul 2026 08:40:07 EDT news703332685 Imagine shining a flashlight across a dark room. You can predict exactly what the light will do: travel in a straight line from one point to another. That seems obvious because, in the world we see around us, light appears to follow a single, clear path. https://phys.org/news/2026-07-quantum-physicist-basics-einstein-spooky.html Quantum Physics Wed, 15 Jul 2026 17:00:01 EDT news703345934 Quantum materials could transform technologies ranging from powerful computers and ultrasecure communications to advanced energy systems. But there has always been one major obstacle. https://phys.org/news/2026-07-physicists-room-temperature-quantum-material.html Quantum Physics Wed, 15 Jul 2026 11:00:35 EDT news703314539 Quantum computers promise to solve problems that would take even the fastest conventional supercomputers a vast amount of time, but the quantum information they store and process is extremely sensitive to even tiny disturbances from their surroundings. To keep these systems operating reliably, they need to be constantly recalibrated—interrupting their calculations in the process. https://phys.org/news/2026-07-faster-quantum.html Quantum Physics Wed, 15 Jul 2026 09:40:12 EDT news703325810 Researchers at Humboldt-Universität zu Berlin have developed a new method for trapping and controlling atoms near an ultrathin glass fiber. This has significantly improved the atoms' ability to store quantum information—an important step forward for future quantum technologies. https://phys.org/news/2026-07-atomic-boosts-quantum-surface.html Optics & Photonics Tue, 14 Jul 2026 15:00:07 EDT news703250168 Researchers at RPTU University Kaiserslautern-Landau have achieved a key experimental breakthrough: For the first time, the spontaneous macroscopic coherence of magnons—the quantized excitations of magnetic materials—has been directly observed. These experiments confirm a central prediction of the theory of magnon Bose-Einstein condensates. Eventually, these findings could open new avenues for signal processing, sensing technologies and information processing. The study has been published in Nature Physics. https://phys.org/news/2026-07-spontaneous-magnon-coherence-room-temperature.html Quantum Physics Tue, 14 Jul 2026 11:40:11 EDT news703241755 Future quantum computing will require correlations between distant modules—a feature known as distributed entanglement. Traditionally, such entanglement has relied on active control and repeated measurements. Now, physicists at the Institute of Science and Technology Austria (ISTA) have realized a fully autonomous method for distributed entanglement using a "quantum bath" of correlated light particles. Published in Physical Review X, their work experimentally confirms a 20-year-old prediction and could provide a new platform for applied quantum technologies. https://phys.org/news/2026-07-physicists-year-theory-boost-quantum.html Quantum Physics Tue, 14 Jul 2026 10:40:04 EDT news703233448 Recent improvements in our understanding of how the principles of thermodynamics apply in the quantum realm could give a boost to quantum technology, and a clearer picture of quantum thermodynamics could in turn enhance our understanding of classical thermodynamics. Now, Aalto University researchers have demonstrated the first cyclic quantum heat engine inside a superconducting circuit. https://phys.org/news/2026-07-world-superconducting-quantum-path-larger.html Quantum Physics Mon, 13 Jul 2026 05:00:01 EDT news702907773 Proving that one quantum measurement is more powerful than another has long been difficult. Physicists from Heinrich Heine University Düsseldorf, Lund University and the University of Innsbruck have now developed and demonstrated a simple technique to certify that a certain class of measurements has properties that cannot be mimicked by simpler means. Their paper is published in the journal PRX Quantum. https://phys.org/news/2026-07-certifies-quantum-simpler-methods-mimic.html Quantum Physics Fri, 10 Jul 2026 13:00:01 EDT news702896090 A team of researchers at the University of Ottawa and its Nexus for Quantum Technologies Institute, in collaboration with researchers from Federico II University in Italy, has developed a programmable quantum simulator that shapes a beam of light to replicate how particles move through complex materials, avoiding the need for ever-larger electronic hardware. https://phys.org/news/2026-07-programmable-simulates-quantum-bigger-circuits.html Quantum Physics Thu, 09 Jul 2026 17:40:06 EDT news702831335 Researchers at The University of Manchester have developed a new computational approach to help identify two-dimensional materials that may host unusual quantum behavior. The work, published in Science Advances, focuses on materials with "flat bands," electronic states where electrons have very little kinetic energy. In these materials, interactions between electrons can become much more important, creating conditions linked to phenomena such as magnetism, unconventional superconductivity and topological electronic behavior. https://phys.org/news/2026-07-physics-based-machine-method-2d.html Condensed Matter Thu, 09 Jul 2026 15:10:02 EDT news702822058 By combining approaches from two rapidly growing fields of quantum physics, researchers at Penn State and Saint Louis University have demonstrated that a novel specialized material can naturally enable a new way to study unusual physical phenomena known as non-Hermitian dynamics. https://phys.org/news/2026-07-quantum-material-path-unusual-electronic.html Condensed Matter Thu, 09 Jul 2026 14:10:03 EDT news702822021 Quantum computers still face limits when it comes to storing information. Researchers at ETH Zurich are now turning to mechanical vibrations rather than electromagnetic memory. Their new vibrating memory can store significantly more information in a smaller volume. Combined with a suitable computer architecture, it also enables the efficient solution of complex computational problems. https://phys.org/news/2026-07-mechanical-vibrations-magnetic-memory-quantum.html General Physics Thu, 09 Jul 2026 10:40:17 EDT news702807933