Articles tagged with Quantum Computing
On-chip frequency shifters in the gigahertz range enable precise color shifting for high-speed optical communication. This innovation has significant implications for the development of quantum computers and future network infrastructure.
MIT physicists have observed the Pauli exclusion principle suppressing how a cloud of ultracold, superdense atoms scatter light. The effect, known as Pauli blocking, makes the atoms effectively transparent and invisible to photons.
A team of researchers has developed a simple and efficient method of quantum encryption using single photons, which can detect any attempt to hack the message. The breakthrough brings us closer to securing our data against quantum computers' potential attacks.
A team of Canadian researchers has successfully simulated baryons on a quantum computer, marking an important step towards more complex simulations. This breakthrough enables scientists to study neutron stars, the earliest moments of the universe, and the revolutionary potential of quantum computers.
Researchers find that triangular-patterned materials can exhibit a mashup of three different phases, with each phase overlapping and competing for dominance. As temperature increases, the material becomes more ordered due to the breaking down of these competing electron arrangements.
Researchers used reinforcement learning to control a small particle moving in a double-well system, achieving accurate control despite noisy measurements. The method shows promise for future applications in quantum technologies and AI.
Researchers at University of Copenhagen have developed a new quantum circuit that can operate and measure all four qubits simultaneously. This breakthrough resolves a significant engineering headache in the development of large functional quantum computers.
Researchers have shown a new way to probe the properties of anyons, strange quasiparticles that could be useful in future quantum computers. By measuring subtle properties of heat conductance, they can detect anyons even in non-conducting materials.
Researchers from Oak Ridge National Laboratory have developed innovative technologies in self-healing sealants, precision deicers and quantum-enabled grid security. These breakthroughs aim to improve construction materials, reduce waste in road maintenance and enhance power grid protection.
Researchers at Osaka University developed a deep neural network to accurately determine qubit states despite environmental noise. The novel approach may lead to more robust and practical quantum computing systems.
Convolutional neural networks can now be trained on quantum computers without the threat of 'barren plateaus' in optimization problems, according to a new study. This breakthrough enables researchers to analyze large data sets and extract insights from quantum systems.
Researchers at KTH Royal Institute of Technology have discovered a new state of matter where electrons condense into foursomes, breaking time-reversal symmetry. The findings, published in Nature Physics, offer insights into the unusual properties of this state and its potential applications.
A novel nanostructure combining aluminium single crystals and semiconductor germanium shows unique effects at low temperatures, including superconductivity and electric field control. This structure is well-suited for complex quantum technology applications and can be fabricated using established semiconductor techniques.
Experts successfully connect quantum computers and sensors on a practical scale, enabling entanglement-based quantum communications. The team demonstrated scalability of entanglement-based protocols across three remote nodes using flexible grid bandwidth provisioning.
Researchers have successfully created a fault-tolerant logical qubit that works better than the worst individual quantum computing pieces. This breakthrough demonstrates a promising approach for building larger, more reliable quantum computers.
Researchers found that quantum mechanics' influence on particles affects light emission, demonstrating wavefunction collapse and altering interference patterns. The study sheds new light on the counter-intuitive phenomenon, revealing a direct connection between light emission and quantum entanglement.
Osaka University and Fujitsu Limited establish a joint research division to develop foundational technologies for fault-tolerant quantum computers, focusing on error correction algorithms and software solutions. The partnership aims to innovate solutions to complex problems in fields like drug discovery and finance.
Scientists discovered structural and surface chemistry defects in superconducting niobium qubits that may cause loss. The study pinpointed these defects using state-of-the-art characterization capabilities at the Center for Functional Nanomaterials and National Synchrotron Light Source II.
Researchers from the University of Hong Kong have discovered a genuine topological Mott insulator in twisted bilayer graphene models. The system's unique properties lead to exotic behavior, including insulating and superconducting phases.
The 2021 Fall Meeting of the APS Division of Nuclear Physics presents cutting-edge research on nuclear astrophysics, quantum technology, and rare isotopes. Researchers will discuss breakthroughs such as the most precise measurement of neutron lifetime and novel experiments measuring neutron skin in calcium.
Researchers have developed ultra-thin, defect-free superconducting flakes for use in quantum computing. The twist angle of the flakes is used to modulate the maximum supercurrent, creating an extremely sensitive magnetic field sensor. This breakthrough has potential applications in healthcare and mineral exploration.
A new optical switch created by an international team could replace electronic transistors in computers, manipulating photons instead of electrons. The device requires no cooling and is fast, with operations per second between 100 and 1,000 times faster than current commercial transistors.
Researchers developed an all-nitride superconducting qubit using niobium nitride on a silicon substrate, achieving long coherence times of up to 22 microseconds. The breakthrough paves the way for large-scale integration and potential applications in quantum computers and nodes.
A team of researchers from Harvard and MIT observed hydrodynamic electron flow in three-dimensional tungsten ditelluride for the first time using a new imaging technique. The findings provide a promising avenue for exploring non-classical fluid behavior in hydrodynamic electron flow, such as steady-state vortices.
The study explores chromium oxides, magnetic compounds used in old tapes, and finds that adding oxygen atoms increases metallic properties. This allows for precise control over electrical conductance, enabling the design of molecular-sized components with vast processing and storage capacities.
Researchers used a groundbreaking technique to study silicon crystals and neutron particles, revealing new information about a possible fifth force of nature. The study achieved fourfold improvement in precision measurement of the silicon crystal structure factor.
Researchers have developed a method to verify the accuracy of quantum computations by having them checked against each other, enabling trust in these complex calculations. The technique works on current hardware without special requirements and can be used to check individual devices against themselves.
Researchers developed a cross-check procedure to verify quantum computers' results through fundamentally different computations. The technique was successfully implemented on various hardware technologies and demonstrated its potential for ensuring the output's correctness.
A new approach to generating quantum-entangled photon pairs uses nonlinear metasurfaces to enhance and tailor photon emissions. The researchers achieved a five-order-of-magnitude increase in the brightness of entangled photons, with a highly configurable platform that can control entanglement and direction.
Researchers from Osaka City University have developed a Bayesian phase difference estimation (BPDE) algorithm that directly calculates the energy difference between two relevant quantum states. This breakthrough enables precise accuracy in chemistry problems and overcomes limitations of conventional full-CI calculations.
A Russian-U.K. research team has proposed a theoretical description for the new effect of quantum wave mixing involving classical and nonclassical states of microwave radiation. The study builds on earlier experiments on artificial atoms, which serve as qubits for quantum computers and probes fundamental laws of nature.
Researchers used quantum computers to study polymer models by recasting them as optimization problems, exploiting the machine's efficiency in solving such tasks. This approach enables harnessing the potential of quantum machines in a hitherto unexplored context.
Researchers from USTC demonstrate the quantum statistics and contextuality of parafermion zero modes using a multi-mode Mach-Zehnder interferometer. The fidelity of the braiding operation reaches 93.4%, enabling a fault-tolerant quantum gate.
Researchers at the University of Bonn developed a method to visualize laser beams in a vacuum, allowing for precise alignment of individual atoms. This breakthrough enables faster and more accurate quantum optics experiments, potentially leading to advancements in computing and materials science.
Scientists detected electronic and optical interlayer resonances in bilayer graphene by twisting one layer 30 degrees, resulting in increased interlayer spacing that influences electron motion. This understanding could inform the design of future quantum technologies for more powerful computing and secure communication.
Researchers create transistors with an ultra-thin metal gate grown as part of the semiconductor crystal, eliminating oxidation scattering. This design improves device performance in high-frequency applications, quantum computing, and qubit applications.
A UC Riverside materials scientist has received a $2 million grant to improve the scalability of quantum computers, allowing them to operate at room temperature. The project aims to create design guidelines and manufacturing strategies for hybrid organic-inorganic structures that can produce quantum computers on a larger scale.
Researchers at University of Illinois and Argonne National Laboratory will explore magnetic materials to reduce noise in quantum computing hardware. The team aims to design non-reciprocal circuitry by harnessing magnetic features, which could lead to a hybrid device for sensing and communication applications.
Quantum engineers at the University of New South Wales have discovered a new technique to control millions of spin qubits, a critical step towards building a practical quantum computer. This breakthrough uses a novel component called a dielectric resonator to focus microwave power and deliver uniform magnetic fields across the chip.
The DTU researchers have developed a universal measurement-based optical quantum computer platform, enabling the execution of any arbitrary algorithm. The platform is scalable to thousands of qubits and can be connected directly to a future quantum Internet.
Researchers at NIST have created a quantum crystal sensor that can measure electric fields with unprecedented sensitivity, potentially revolutionizing dark matter detection. By entangling the mechanical motion and electronic properties of tiny ions, the sensor can detect subtle vibrations caused by dark matter particles.
EPFL professor Giuseppe Carleo and graduate student Matija Medvidović have developed a method to simulate the behavior of variational quantum algorithms on classical computers. This approach uses machine-learning tools to emulate the inner workings of a quantum computer, setting a new benchmark for future development of quantum hardware.
A new $2.7 million grant from the US Department of Energy will support a three-year research effort to identify and store quantum information in solids, enabling significant advancements in quantum computing. The project aims to build a database of viable qbits by analyzing defects in solids.
Scientists at Argonne National Laboratory have devised a unique means of achieving effective gate operation with electromagnonics. They can rapidly switch between magnonic and photonic states over a period shorter than the magnon or photon lifetimes, enabling real-time control of information transfer.
Researchers from NUS have developed two methods to ensure QKD communications cannot be attacked using side-channel attacks. The first is an ultra-secure cryptography protocol that can be deployed in any communication network, and the second is a device that defends against bright light pulse attacks by creating a power threshold.
Scientists investigated full-shell semiconductor-superconductor nanowire structures for evidence of Majorana bound states, but found no confirmation. Instead, zero-bias peaks were attributed to Andreev bound states, which can mimic Majorana modes.
Jin Hu, a physicist at the University of Arkansas, received a prestigious Early Career Research Program award from the US Department of Energy to advance research into novel topological quantum materials. His five-year award will support studies on crystal growth, characterization and various measurements in high field, low temperature...
Quantum nonlocality is a universal property that prevails regardless of particle speed or indeterminacy. Researchers designed an experiment to test this phenomenon, using the principle of physical phenomena being independent of frame of reference, to prove nonlocality for any quantum particle.
Researchers from Rensselaer Polytechnic Institute demonstrate a new structure of correlated insulating state in TMDC materials, enabling greater control over excitons. This breakthrough is crucial for developing quantum emitters needed for future quantum simulation and computing.
Scientists have successfully transferred and recovered quantum coherence from photons scattered in free-space for the first time, paving the way for new applications in quantum communication, imaging, and sensing. The novel technique uses custom hardware to maintain coherence even after scattering from a diffuse surface.
A new experiment demonstrates the stability of quantum interactions between coupled atoms under electron bombardment. The findings suggest that special quantum states may be realized in quantum computers more easily than previously thought.
Researchers have successfully demonstrated direct observation and measurement of quantum entanglement at a macroscopic scale using vibrating membranes. This breakthrough enables the extension of measurements to larger systems, with potential implications for quantum computing and fundamental physics research.
Assistant Professor Robert Fickler and Doctoral Researcher Markus Hiekkamäki demonstrated near-perfect two-photon interference control using spatial photon shape. The method holds promise for building new linear optical networks and developing quantum-enhanced sensing techniques.
Prof. Dr. Piet O. Schmidt receives EU funding to explore fundamental questions of modern physics, aiming to improve limits for new forces and changes in natural constants. His team plans to develop novel measurement methods using highly charged ions.
A team of scientists has demonstrated atom interferometry on a sounding rocket, enabling precise measurements of gravity and potentially detecting gravitational waves. The success of this experiment marks a significant milestone in the field of quantum technologies.
A multidisciplinary team of scientists has developed a new way to detect phase transitions in raw data by analyzing its intrinsic dimension, a statistical property that reveals collective properties of partition functions. This method is agnostic and does not require prior knowledge of the system's parameters.
Researchers at Purdue University have addressed an issue that was barring the development of quantum networks. By deploying a programmable switch, they can adjust how much data goes to each user by selecting and redirecting wavelengths of light carrying different data channels. This allows for the increase in users without adding to ph...
Scientists at Cornell University have successfully created a material structure that simultaneously exhibits superconductivity and the quantum Hall effect. This breakthrough could enable the development of more efficient electronics, such as data centers cooled to extremely low temperatures.
An international team of experts has demonstrated that only quantum gravity can create a specific ingredient needed for quantum computation. The proposed experiment involves cooling billions of atoms to extremely low temperatures and applying a magnetic field, which would reveal the underlying gravity if it's quantum.
Physicists have produced kagome graphene, a carbon-nitrogen compound with unusual electrical properties, including semiconducting behavior that can be switched on and off. The material's unique structure and strong electron interactions could lead to the development of sustainable electronic components.