Articles tagged with Quantum Information Science
A team from Université libre de Bruxelles has discovered an unexpected counter-example to the common assumption that photon bunching is maximum for fully indistinguishable photons. By fine-tuning polarization, they found a way to strengthen rather than weaken bunching.
Scientists have successfully entangled atomic samples to circumvent quantum projection noise, achieving a measurement precision level of 10^-17 in optical-lattice clocks. This breakthrough improves the frequency stability of optical lattice clocks, advancing practical applications and fundamental physics research.
Researchers identified a security vulnerability in QKD transmitter modulator devices, allowing attackers to exploit it and obtain entire key information. The team proposed solutions to mitigate risks through meticulous system design and optimized device utilization.
Researchers developed a new technique called zero noise extrapolation (ZNE) that allows noisy quantum computers to produce accurate results for specific calculations. This breakthrough could enable the use of quantum computing for cutting-edge physics problems and improve classical algorithms.
Scientists from USTC and their collaborators achieve a record-breaking point-to-point long-distance quantum key distribution of 1002 km using the twin-field QKD (TF-QKD) protocol. The achievement demonstrates the feasibility of TF-QKD at extremely long distances, enabling high-speed intercity quantum communication networks.
Scientists have developed a new dynamic probe to measure electric interactions between molecules and the environment. Using ultrashort terahertz pulses, they mapped the optical absorption of molecules in an external electric field, revealing the strength and dynamics of these forces.
Researchers have developed a quantum model that can simulate non-Markovian stochastic processes using only one quantum bit, achieving higher accuracy than optimal classical models. This breakthrough demonstrates the potential of quantum technology for complex systems modeling.
The team used an acoustic beamsplitter to demonstrate the quantum properties of phonons, showing they can be split and create interference between two phonons. This breakthrough is a crucial step toward creating a linear mechanical quantum computer using phonons instead of photons.
Scientists observe a bright optical emission after the most powerful gamma-ray burst documented, providing detailed data on radiation across various wavebands. The study reveals that luminous phenomenon arises from high-energy charged particles in a rarefied medium with a powerful magnetic field.
The CALorimetric Electron Telescope (CALET) study found that the movement of cosmic rays is affected by the Sun's magnetic field, causing fluctuations in galactic cosmic rays reaching Earth. The research indicates that electrons are more susceptible to solar modulation than protons.
Researchers have developed a novel encoding scheme called critical Schrödinger cat code, which could revolutionize the reliability of quantum computers. This technique uses a hybrid regime to operate close to the critical point of a phase transition, resulting in enhanced error suppression capabilities.
Researchers have successfully characterized a single atom using X-ray beams, detecting its elemental type and chemical properties. This breakthrough could revolutionize fields like quantum information technology, environmental science, and medical research by enabling the study of individual atoms.
Researchers have developed an innovative approach to efficiently manipulate topological edge states for optical channel switching. By exploiting the finite-size effect in a two-unit-cell optical lattice, they achieved dynamic control over topological modes and demonstrated robust device performance.
Researchers at USC Viterbi School of Engineering achieved a quantum speedup advantage in a bitstring guessing game, managing strings up to 26 bits long by suppressing errors. The study demonstrates that with proper error control, quantum computers can execute complete algorithms with better scaling, even in the NISQ era.
Researchers at USTC successfully generated cryogenic integrated quantum entangled light sources using spontaneous four-wave mixing effect, enabling scalable quantum information applications. The study also explored noise mitigation and frequency-multiplexed energy-time entangled states.
University of Washington researchers have detected atomic vibrations, also known as phonons, in a two-dimensional atomic system. The discovery could help encode and transmit quantum information through light-based systems.
Researchers used x-ray photoelectron spectroscopy to study the chemical profile of tantalum surface oxides, revealing different kinds of tantalum oxides at the surface. This discovery prompted a new set of questions on modifying interfaces to improve device performance and minimizing loss.
Researchers successfully detect X-ray signature of individual atoms, enabling the identification of materials at an atomic level. The breakthrough technique has potential applications in environmental and medical sciences, as well as advancing technology.
The CALET team, including researchers from Waseda University, found that cosmic ray helium particles follow a Double Broken Power Law, indicating spectral hardening and softening in high-energy ranges. This deviation from expected power-law distribution suggests unique sources or mechanisms accelerating and propagating helium nuclei.
Researchers at Purdue University have discovered that superconductive images are actually 3D and disorder-driven fractals. The team used fractal mathematics to characterize the shapes of electrons in a cuprate high-temperature superconductor, revealing patterns that challenge current understanding of quantum materials.
An international research team has confirmed for the first time that mutual information in a many-body quantum system scales with surface area rather than volume. The experiment used ultracold atoms and a special tomography technique to measure the shared information.
Researchers at Argonne National Laboratory and University of Chicago developed a hybrid simulation process using IBM quantum computers to solve electronic structure problems. The new method uses classical processing to mitigate noise generated by the quantum computer, paving the way for future improvements.
Scientists at Tokyo University of Science generate vector vortex light beams and imprint their structure on electron spins in a semiconductor solid, creating helical spatial structures. This breakthrough enables higher information storage capacity by exploiting effective magnetic fields alongside structured light beams.
Researchers discovered a way to translate quantum information between different quantum technologies using atoms and lasers. The technology allows the transfer of quantum information from microwave photons to optical photons, enabling long-distance connections between quantum computers.
Researchers at UNIGE have designed a quantum material that can be controlled by curving space, allowing for ultra-fast electromagnetic signal processing and potential applications in high-speed communication systems. The material's unique properties enable the creation of new sensors and potentially unlock new avenues in exploration.
Researchers develop new way to generate squeezing that overcomes fundamental quantum imprecision, enabling more precise atomic clocks and improved quantum sensors. The new approach leverages bosonic pair creation and enables entangled states with minimal fuss, reducing experimental challenges.
Scientists have made a groundbreaking discovery in quantum computing, enabling the creation of an experimental wormhole. The 'counterportation' approach harnesses basic laws of physics to transport small objects across space without particles crossing.
Researchers developed a technique to predict how quantum systems behave when connected to their environment, turning a problem into a solution. The approach combines techniques from quantum many-body physics and non-Hermitian quantum physics, providing a crucial tool for real-world applications of quantum technology.
Researchers at Argonne National Laboratory have created a stable spin qubit in a carbon nanotube, achieving record-long coherence times of up to 10 microseconds. This breakthrough enables the integration of quantum devices and provides a platform for storing information through vibrations in the flexible tubes.
A team of scientists developed a new method to distinguish between correlated and independent magnetic fields detected by multiple quantum sensors. This technique uses sophisticated computation and signal-processing techniques, enabling the detection of subtle relationships between microscopic magnetic fields.
Researchers have developed a new device that can effectively redistribute noise and reduce its impact on quantum measurements. By 'squeezing' the noise, they can make more accurate measurements, enabling faster and more precise quantum systems. The device has the potential to improve multi-qubit systems and metrological applications.
Researchers from Nanjing University have proposed the first scheme to practically generate N-photon states deterministically using a lithium-niobate-on-insulator platform. The scheme involves deterministic parametric down-conversion and demonstrates feasibility for generating multiphoton qubit states.
Researchers at the University of Innsbruck have successfully entangled two trapped ions separated by 230 meters, using photons transmitted through an optical fiber cable. This breakthrough demonstrates the potential of trapped ions as a platform for building future quantum networks and distributed computing systems.
Researchers at the University of Rochester develop a new method to control electron spin in silicon quantum dots, paving the way for practical silicon-based quantum computers. The technique harnesses spin-valley coupling to manipulate qubits without oscillating magnetic fields.
Researchers from Waseda University measured the energy spectrum of boron and the B/C flux ratio in high-energy cosmic rays using the CALorimetric Electron Telescope. The results indicate a different spectral index for boron compared to carbon, with implications for our understanding of cosmic ray propagation mechanisms.
Researchers have developed a novel way to measure a quantum device's accuracy by analyzing universal statistical patterns in the noise. This approach takes advantage of the way information is scrambled in quantum systems, allowing for more efficient error detection and verification.
Researchers have developed a van der Waals crystal featuring monolayer-like excitonic behavior in bulk form, leading to a verified weak interlayer electronic coupling. The crystal enables a spontaneous parametric down-conversion process, resulting in a detection of one photon heralding the presence of another.
Engineers at Diraq and UNSW Sydney discovered a new way to precisely control single electrons in quantum dots using electric fields, which is less bulky and requires fewer parts. This breakthrough technique can help achieve the goal of fabricating billions of qubits on a single chip for commercial production.
Researchers have developed a quantum computing architecture that enables directional photon emission, the first step toward extensible quantum interconnects. This breakthrough enables the creation of larger-scale devices by linking multiple processing modules along a common waveguide.
Researchers demonstrated high-visibility quantum interference between two independent semiconductor quantum dots, an important step toward scalable quantum networks. The observed interference visibility is up to 93%, paving the way for solid-state quantum networks with distances over 300 km.
Illinois researchers create a metamaterial that changes its functionality based on power input, mimicking semiconductor behavior. The material's non-linear properties enable the creation of qubits dynamically, promising new quantum information systems.
AQT at Berkeley Lab organized a workshop on classical control systems for quantum computing, bringing together industry leaders and researchers to share experimental control advances. The workshop highlighted the need for advanced features in classical control electronic systems to optimize quantum computer performance.
ICFO researchers successfully demonstrate transport of two-photon quantum states through a phase-separated Anderson localization optical fiber, showing maintained spatial anti-correlation. The phase-separated fiber enables efficient transmission of quantum information via Corning's optical fiber.
Researchers at Penn Engineering have created a chip that outstrips existing quantum communications hardware, communicating in qudits and doubling the quantum information space. The technology enables significant advances in quantum cryptography, raising the maximum secure key rate for information exchange.
Researchers used quantum chemical calculations to study DNA replication and found that enzyme helicase speeds up the process, stabilizing mutated forms of DNA. This discovery sheds new light on the role of quantum effects in genetic mutations.
The Arizona State University's Quantum Collaborative is a major initiative promoting understanding of advanced quantum technology and forging partnerships to advance it. The collaborative aims to develop a robust talent pipeline for a quantum-enabled economy through certifications, upskilling opportunities, and modified degree programs.
Scientists at the Max Planck Institute have developed a unidirectional device that significantly increases the quality of optical vortex signals. By transmitting selective optical vortex modes exclusively unidirectionally, they largely reduce detrimental backscattering to a minimum.
Researchers at the University of Innsbruck have developed a new architecture for universal quantum computers using parity-based qubits. This design reduces the complexity of implementing complex algorithms while also offering hardware-efficient error correction.
Researchers have successfully demonstrated large numbers of interacting qubits maintaining coherence for an unprecedentedly long time, in a programmable solid state superconducting processor. This breakthrough could accelerate computing processes and enable applications such as quantum sensing and metrology.
A multi-institutional team has developed an efficient method for measuring high-dimensional qudits, which are more resistant to noise and can carry more information than qubits. The technique uses phase modulators and pulse shapers to characterize qudit entanglement with unprecedented precision.
A team at Lawrence Berkeley National Laboratory has developed a method to create tiny light-emitting points called color centers in twisted crystalline boron nitride, which can be easily controlled between two quantum states. This breakthrough offers a route toward scalable quantum computing and sensing.
Researchers detected a spectral softening around 10 TeV in the high-energy cosmic ray proton spectrum, suggesting the proton energy spectrum is not consistent with a single power law variation. The study contributes to understanding of cosmic ray acceleration by supernovae and propagation mechanism.
The University of Texas at Dallas is receiving a $5 million NSF grant to advance quantum research and education. The grant aims to train the workforce needed for neutral-atom-based quantum information processing, which has immense potential to speed up computation.
Scientists have developed a thin device that can produce complex webs of entangled photons, enabling new information processing schemes and advanced encryption methods. The device uses a metasurface to control the phenomenon of quantum entanglement, paving the way for more compact and powerful computing and sensing technologies.
Researchers from Purdue University have proposed a method to generate entangled photons at extreme-ultraviolet wavelengths, enabling the tracking of electron dynamics on attosecond timescales. This could push the limits of measurement down to zeptoseconds, improving our understanding of atomic and molecular behavior.
Researchers at Dalian Institute of Chemical Physics controlled the fine structure splitting of lead halide perovskite quantum dots by inducing lattice distortion. This allows for coherent quantum beating, a crucial phenomenon in quantum information science.
Researchers at Columbia University have discovered a way to visualize magnons in a 2D material, CrSBr, by pairing them with excitons that emit light. This breakthrough enables the observation of tiny changes in magnon spins, potentially leading to the development of more efficient quantum information networks.
Researchers at NICT have developed a new systematic method to identify the optimal quantum operation sequence, enabling efficient task execution and contributing to improving quantum computer performance and reducing environmental impact. The method uses GRAPE algorithm to analyze all possible sequences of elementary quantum operations.
Researchers experimentally verified the generalized eigenstate thermalization hypothesis (GETH) using a quantum-walk platform. They demonstrated that any superposition state within a small energy-momentum window relaxes to the same reduced state, independent of the initial state.
Physicists have developed a 'master equation' to understand feedback control at the quantum level, enabling precise real-time control over quantum systems. This breakthrough has the potential to revolutionize quantum technologies by exploiting quantum effects and mitigating fragile system properties.