Articles tagged with Quantum Information
Researchers at UC Santa Barbara have identified a hydrogen-free, telecom-wavelength quantum-light emitter in silicon, called the CN center. This defect reproduces key electronic and optical properties of the T center, making it a promising alternative for practical quantum devices.
A study reveals that identical photons in optical circuits exhibit Hopfield Network behavior, enabling associative memory mechanisms similar to the human brain. The research finds a fundamental limit to memory capacity, with quantum coherence allowing correct retrieval but transitioning to disorder as data volume increases.
Researchers have achieved a crucial building block for new quantum computers by realizing a novel type of quantum logic gate that works with pairs of photons in four different states, enabling new opportunities for optical quantum computing. This milestone opens up possibilities for faster calculations and improved stability.
Giant superatoms combine two quantum-mechanical constructs to suppress decoherence and create entanglement, opening opportunities for scalable and reliable quantum systems. This breakthrough enables quantum information to be protected, controlled, and distributed in new ways.
The QCyber project aims to develop secure quantum-based methods for communication among multiple users, including diplomatic and financial applications. It will be tested in a real fibre-optic network in Stuttgart with up to six nodes and over distances of up to 20 km.
Duke University researchers have observed statistical localization in a neutral-atom platform, where most configurations of quantum bits remain effectively frozen. This phenomenon has implications for robustly storing information in a quantum system and could be a powerful feature of quantum mechanics.
A team of Chinese researchers has achieved device-independent quantum key distribution over 100 km, paving the way for practical long-distance quantum networks. This breakthrough enables the creation of scalable quantum repeaters, a critical building block for universal quantum computers.
Researchers identified surface noise mechanisms that degrade NV center coherence in diamond, which limits sensor performance. The study provides physics-based guidelines for engineering diamond surfaces to preserve quantum coherence.
Scientists at Chalmers University of Technology have created a novel quantum refrigerator that utilizes problematic noise to cool down extremely low temperatures. The innovative design enables precise control over heat and energy flows, making it an essential component for scaling up quantum technology.
A new project aims to develop robust logical quantum bits for scalable and fault-tolerant quantum computing. The snaQCs2025 project combines innovative simulation and integration methods to compensate for error susceptibility of physical qubits, bringing quantum computing closer to practical use.
Researchers have discovered a new method for generating highly stable and precise microwave signals through self-induced superradiant masing. This phenomenon produces long-lived bursts of microwave emission without external driving, paving the way for technological advances in fields like medicine, navigation, and quantum communication.
Researchers at Paderborn University and TU Dortmund University have developed materials smaller than the wavelength of light and precisely manipulated photons. They created quantum light sources for quantum computing and ultra-fast communication, as well as low-temperature electronics to control quantum experiments.
Researchers have developed a nearly 100 times smaller device that can efficiently control lasers required for thousands of qubits, unlocking potential for larger quantum computers. The device uses microwave-frequency vibrations to manipulate laser light with extraordinary precision.
The study reveals the exceptional versatility of magnetic Weyl semimetals in chiral control, enabling real-time and reversible modulation by external fields. This property establishes them as a more adaptable platform for future quantum devices based on chiral degrees of freedom.
A team of researchers at Waseda University has discovered a new correlation between spins, orbitals, and lattice distortions in spinel-type compounds. Magnetic ordering can trigger Jahn-Teller distortions through spin-orbit coupling.
A team of researchers from Paderborn University and the Sapienza University of Rome successfully teleported the polarisation state of a single photon between two physically separated quantum dots. This achievement represents a crucial step towards scalable quantum relays and the practical implementation of a quantum internet.
Scientists at the University of Stuttgart have successfully teleported quantum information between photons from two distant quantum dots, overcoming a crucial technical hurdle. The achievement brings them closer to developing quantum repeaters for the quantum internet.
Researchers developed a new method to build rare-earth doped crystals, increasing quantum coherence times and enabling long-distance connections. This breakthrough brings the potential for a global-scale quantum internet closer than ever.
Researchers have successfully demonstrated the feasibility of sending entangled photon pairs from ground stations to a satellite, overcoming previous barriers to quantum satellite communications. This breakthrough could pave the way for future quantum computer networks using satellite relays.
Researchers have developed a highly efficient fiber-coupled single-photon source that generates photons directly inside an optical fiber, reducing transmission loss. This breakthrough enables the creation of secure quantum communication networks and paves the way for next-generation all-fiber-integrated quantum computing technologies.
Scientists observed tiny but spontaneous distortions in the crystal lattice of Cu_xBi_2Se_3 as it entered a superconducting state. This marks the first clear evidence of a topological superconductor coupling to the crystal lattice, advancing understanding of exotic electronic states.
Researchers have created a chip-based device that can split phonons, enabling the connection of different quantum systems via phonons. This device could help link superconducting qubits with spin-based systems, supporting advances in computing and secure communication.
The development of molecular qubits that operate at telecom frequencies enables the creation of ultra-secure communication channels and precise sensing capabilities. These tiny molecules can be integrated into chips and used for computing, communication, or sensing, paving the way for compact quantum devices.
Scientists develop novel LDPC quantum error correction codes that can handle hundreds of thousands of logical qubits and approach the theoretical hashing bound. The new codes achieve extremely high decoding performance, demonstrating a frame error rate as low as 10^-4, even for large-scale numerical simulations.
Researchers at the University of Sydney have developed a new strategy to precisely measure position and momentum simultaneously, sacrificing some global information for finer detail. This breakthrough could enable ultra-precise quantum sensors for navigation, medicine, astronomy, and fundamental physics applications.
Researchers at U-M have established a quantum testbed that links two labs with optical fibers, enabling remote quantum experiments and expanding access to quantum technology development. The testbed allows for the transfer of entangled light over long distances, revolutionizing communication, computing, and scientific discovery.
A team of researchers at Simon Fraser University has created a new type of silicon-based quantum device controlled by both electricity and light. The breakthrough demonstrates an electrically-injected single-photon source in silicon, clearing a major hurdle for building a scalable quantum computer. This development holds significant po...
A Chicago Quantum Exchange-led coalition, Quantum Connected, has advanced to the final stage of the National Science Foundation Regional Innovation Engines program. The coalition aims to build critically needed quantum-based cyber security and could receive up to $160 million over 10 years.
Researchers developed a new tool that combines electronic structure theories and machine learning to simulate transition metal catalytic dynamics. The Weighted Active Space Protocol (WASP) delivers dramatic speedups, enabling simulations of catalysts under realistic conditions.
Scientists have developed a method to generate pseudomagnetic fields inside photonic crystals, allowing for arbitrary control of light flow. This technique enables high-speed data transmission and opens new possibilities for optical communications and quantum technologies.
Researchers at Purdue University develop atomic-scale spectroscopy using ultrathin 2D materials, enabling improved resolution for NMR spectroscopy. The breakthrough has potential applications in quantum computing and quantum communications.
The team's integrated chip coordinates quantum and classical data, speaks the same language as the modern web, and automatically corrects for noise. The approach paves the way for a future 'quantum internet,' which could enable advances like faster AI and new materials.
The POEM Technology Center in Denmark will produce advanced wafers for photonic chips, enabling the development of high-speed communication and optical data processing. The facility will also facilitate the production of quantum chips, a key component in large-scale quantum computing.
Researchers at the University of California, Riverside, have made a breakthrough in building larger and more reliable quantum computers by linking multiple quantum chips. The team found that even imperfect links between quantum chips can produce a functioning fault-tolerant quantum system.
Researchers at the University of Innsbruck have demonstrated a powerful node for quantum networks using a string of calcium ions in a prototype computer. The node achieved an average ion-photon entanglement fidelity of 92 percent, paving the way for connecting entire quantum processors across laboratories or continents.
Researchers successfully realized a stable, isolated quantum spin on an insulating magnesium oxide surface placed over a ferromagnetic iron substrate. The MgO/Fe(001) structure, widely used in spintronics, enables the formation of isolated spins due to its lack of conduction electrons.
Researchers have designed protein qubits that can be produced by cells naturally, opening possibilities for precision measurements of tissues, single cells, or even individual molecules. These protein-based qubits can detect signals thousands of times stronger than existing quantum sensors.
Researchers propose a quality management system for quantum technologies to ensure security, interoperability, transparency and accountability. International standards can facilitate cooperation among countries like China, the US, and Europe, creating trust in new technologies.
A new study demonstrates how a single type of 'neglecton' particle can make Ising anyons universal, enabling any quantum computation through braiding alone. The breakthrough uses non-semisimple topological quantum field theories to overcome unitarity issues and unlock the full power of Ising-based systems.
New experimental techniques can measure intense magnetic fields generated in heavy-ion collisions, shedding light on fundamental physics and the early universe. By studying magnetic field evolution over time, researchers can gain insights into QGP behavior and its effects on particles.
Researchers combined quantum computing with supercomputing to simulate large molecule stability and behavior, overcoming current barriers. The hybrid approach used a quantum computer for complex calculations and a supercomputer for error correction, enabling accurate predictions of molecule stability.
Physicists from Aalto University have measured a transmon qubit coherence time of over a millisecond, surpassing previous records and enabling more complex quantum computations. This breakthrough marks a significant step towards noiseless quantum computing.
Scientists at the University of Copenhagen have developed a way to transmit phonons through an ultra-thin membrane with almost no signal loss. This breakthrough has potential applications in quantum computing and sensing, where precise signal transfer is crucial.
Researchers unveiled an analogous law for the quantum world, proving that entanglement can be reversibly manipulated. An entanglement battery enables efficient manipulation of entanglement and other quantum phenomena.
Researchers propose a discrete-modulated coherent-state quantum key distribution scheme with basis-encoding, reducing post-processing complexity and improving reconciliation efficiency. Experimental results show significant enhancements in tolerating channel loss, achieving a key rate of 13.12 kbps under 11 dB of channel loss.
The latest issue of Optica Quantum features research on cryogenic photonic links for superconducting qubits, spatio-spectral quantum state estimation of photon pairs from optical fiber, and quantum optical reservoir computing powered by boson sampling. These studies demonstrate breakthroughs in measuring and optimizing quantum states, ...
A national pilot program led by UTA faculty is helping take the mystery out of quantum physics for students and educators. The program, Quantum for All, provides hands-on curriculum and classroom strategies to equip high school science teachers with the tools they need to teach quantum science.
A team of researchers from the University of Sydney has developed a silicon chip that can control spin qubits at milli-kelvin temperatures, paving the way for scaling up quantum transistors from under 100 to millions. This breakthrough technology has the potential to make practical quantum computers a reality.
Researchers from OIST develop new quantum AI method for image recognition based on boson sampling, achieving highly accurate results without complex training. The approach uses a linear optical network and preserves information, outperforming classical methods in various datasets.
The Quantum Technician Bootcamp at Central New Mexico Community College is a 400-hour course that provides students with hands-on skills necessary for job placement in the quantum industry. The program, led by Sandia National Laboratories and CNM, aims to address the shortage of trained workers in the field.
Researchers at UBC propose a silicon-based device that can convert microwave to optical signals with high efficiency, paving the way for long-distance quantum communication. The technology preserves entangled links between particles, essential for quantum networking.
The Berggren Center for Quantum Biology and Medicine will merge quantum technology with biology to transform medicine, driving the development of revolutionary quantum tools and cultivating bilingual scholars. Researchers will translate quantum advances into clinical solutions, enabling new diagnostics and therapies.
Researchers have developed a new type of exotic quantum material that can maintain its quantum properties when exposed to external disturbances, paving the way for robust quantum computers. The breakthrough uses magnetism to create stability, making it an important step towards realising practical topological quantum computing.
Researchers at Rice University confirm a decade-old prediction of boron atoms sticking too tightly to copper, forming a new compound with distinct atomic structure. The discovery expands knowledge on 2D metal boride materials, which could inform future studies in electronics and energy applications.
The fifth annual Quantum Science Center Summer School at Purdue University welcomed its largest group of students, with a focus on introductory presentations and technical talks. Graduate students and doctoral candidates led the program, which covered topics such as quantum materials, devices, and algorithms.
Researchers create new quantum biosensor using diamond nanoparticles and specially engineered shell, outperforming previous attempts. The breakthrough sheds light on a longstanding mystery in quantum materials and shows up to fourfold improvements in spin coherence.
Researchers at Caltech successfully controlled the motion of individual atoms, encoding quantum information, and demonstrated hyper-entanglement in massive particles. This experiment could lead to advancements in quantum computation and precision clocks.
Researchers at University of Chicago Pritzker School of Molecular Engineering discovered one of the world's thinnest semiconductor junctions within a quantum material. The discovery could lead to ultra-miniaturized electronic components and provides insight into electron behavior in materials designed for quantum applications.
Researchers at U of A create a transistor that operates at speeds over 1,000 times faster than modern computer chips. The breakthrough uses quantum effects to manipulate electrons in graphene, enabling ultrafast processing for applications in space research, chemistry, and healthcare.
The new Priority Program will focus on developing IT components utilizing altermagnetism, which combines the benefits of ferromagnets and antiferromagnets. Researchers aim to overcome current limitations and achieve a significant increase in efficiency and speed.