Articles tagged with Quantum Processors
Researchers have discovered a new chemical design principle for exploiting destructive quantum interference to create a six-nanometer long single-molecule switch with an enormous on/off ratio. The approach enables the production of stable and reproducible single-molecule switches at room temperature.
Australian researchers have located the 'sweet spot' for positioning qubits in silicon, essential for developing robust interactions between qubits. The team used scanning tunnelling microscope (STM) lithography techniques to precisely place phosphorus atoms and create reproducible, strong and fast interactions.
Researchers integrate nanodiamonds into nanophotonic circuits, controlling individual photons and spin states, enabling high-sensitivity magnetic field sensors and new applications in quantum technologies.
Researchers have developed a new software method for compressing quantum circuits, reducing the size and runtime of large-scale fault-tolerant quantum computers. This compression technique achieves up to 77% reduction in volume, potentially enabling the realization of real-world quantum computers years ahead of schedule.
Researchers from Tokyo University of Science design a new quantum circuit that calculates the fast Fourier transform, a key algorithm in engineering. The QFFT circuit exploits superposition of states to greatly increase computational speed and is more versatile than traditional QFT.
Researchers at UNSW Sydney demonstrated the lowest recorded charge noise for a semiconductor qubit, reducing it by 10 times compared to previous results. The team's achievement shows promise for large-scale error-corrected quantum computers and moves closer to commercializing silicon quantum computers.
A new algorithm called Variational Fast Forwarding (VFF) can simulate quantum systems for longer periods than current quantum computers can handle. This allows scientists to tackle complex problems that were previously unsolvable due to decoherence, which degrades quantum coherence.
A new machine learning-assisted method has been developed by Purdue University engineers to rapidly preselect solid-state quantum emitters for large-scale integration on chips. This approach significantly speeds up the process, reducing analysis time from minutes to seconds.
A new protocol allows for the protection and correction of fragile quantum information in case of qubit loss, addressing a crucial issue in quantum computing. This breakthrough could prove essential for future large-scale quantum computer development.
Researchers at Purdue University have developed a new theory that may lead to systematic design of quantum algorithms, outperforming classical computers. The theory identifies large groups of quantum states with polynomial complexity, allowing for efficient coefficient sampling procedures to determine their suitability.
Researchers created a family of benchmark quantum circuits with known optimal depths or sizes to improve quantum compilation design. This could lead to computation speeds up to 45 times faster than currently demonstrated. The benchmarks, named QUEKO, have been made open source and are available on GitHub.
Researchers at MIT and Sandia National Laboratories have developed a hybrid approach to fabricate large-scale quantum chips using diamond-based qubits and quantum photonics. The new method enables the creation of complex quantum devices with reliable circuits for transmitting and manipulating quantum information.
Using a quantum computer, researchers simulated time travel into the past, damaging one qubit. However, when all qubits returned to the present, they appeared largely unaltered, suggesting self-healing in reality. The study challenges traditional views of chaos and disorder in complex systems.
Army researchers have developed a new way to protect and safeguard quantum information, allowing for more efficient and secure communication. By understanding and removing certain types of noise in quantum channels, the team can convert bad noise into good noise with the addition of a cheap extra component.
A new quantum classifier introduces a tailored quantum kernel, outperforming AI technology and enhancing classification tasks with small datasets. The method exploits the quantum advantage in finding non-linear features, leading to significant improvements.
Researchers have created the first quantum phase battery, which induces supercurrents in a quantum circuit by providing a persistent phase difference. The battery consists of an indium arsenide nanowire and aluminum superconducting leads.
Researchers at the University of Bristol have developed a novel technique to generate high-quality single photons, paving the way for large-scale quantum photonics. The breakthrough enables the creation of scalable quantum photonics devices, which can solve complex problems beyond current supercomputers.
Researchers demonstrated optical polarization and reading of electronic spin color centers in boron nitride. The study proposes a microscopic model of the center, a boron vacancy in a negative charge state, and shows potential for vander Waals materials in atomic-scale quantum technologies.
Researchers have confirmed a method for developing photonic circuits with optical nonlinearities that can function at room temperature. This approach could lead to more efficient and powerful quantum computers, bypassing the need for extremely cold temperatures.
Researchers at UNSW Sydney have developed a proof-of-concept quantum processor unit cell that works at 1.5 Kelvin, 15 times warmer than previous designs, allowing for affordable and real-world business applications. This breakthrough addresses one of the biggest constraints to practical quantum computers.
A team at NIST has developed an AI system that can auto-tune quantum dots for creating functional qubits, overcoming a major engineering hurdle. The system uses machine learning to recognize images of quantum dot measurements and make precise adjustments.
Scientists have visualized single molecules moving inside a helium droplet, observing ultrafast intramolecular processes. The researchers found that superfluid helium has little influence on these processes compared to conventional solvents.
Researchers from ITMO University have predicted a novel type of topological quantum state in two-photon systems. A new experimental method using classical electric circuits has been developed to test these predictions, offering valuable information for the engineering of optical chips and quantum computers.
A team of Skoltech scientists discovered reachability deficits in the widely adopted QAOA algorithm, limiting its ability to solve certain problems. The study found that QAOA's performance depends on the problem density, with high-density instances having optimal solutions that cannot be approximated with guaranteed success.
Researchers highlight successes and challenges of quantum computing in the NISQ era, a period where quantum computers approach evidence of quantum supremacy. Key findings include the development of new strategies to reduce measurement errors and the demonstration of programmability on quantum computers.
Researchers at Kiel University have created a new simulation method that enables fast calculations of many-body quantum dynamics, saving computer time by up to 10,000 times. This breakthrough allows for simulations of complex quantum systems, such as molecules and solids, with unprecedented accuracy.
A new quantum process tomography method based on convex optimization effectively characterizes quantum channels, revealing their true action with high accuracy. The method demonstrates excellent performance in both unitary and non-unitary quantum channels, achieving up to 99.5% accuracy.
Researchers created a neural network that autonomously finds solutions well-adapted to quantum advantage demonstrations, aiding in developing new efficient quantum computers. This breakthrough enables the prediction of quantum advantages in complex networks, which is crucial for creating cost-effective and reliable quantum devices.
Researchers at Oak Ridge National Laboratory have developed a quantum chemistry simulation benchmark to evaluate the performance of quantum devices. The benchmark characterizes the 'mixed state' of how the environment and machine interact, providing insight into systematic error mitigation in current quantum hardware. This work aims to...
Cycle benchmarking provides a solution to compare the capabilities of quantum processors across different architectures and applications. Researchers have made significant progress in characterizing errors in quantum systems, paving the way for establishing universal standards for measuring quantum computer performance.
Researchers have successfully created a large-scale quantum processor made entirely of laser light, providing a scalable solution to overcome current limitations in quantum computing. The design allows for the generation of a massive two-dimensional cluster state with built-in scalability.
Researchers at the University of Münster have created an interface that couples light sources with nanophotonic networks, enabling the integration of quantum optical circuits on chips. The interface uses photonic crystals to enhance a specific wavelength range and can be replicated using established nanofabrication processes.
University of Illinois researchers Kwiat and Kaneda have built a single-photon source that produces 30 photons at unprecedented efficiencies. By using time multiplexing, they reduced the loss rate to 1.2 percent per cycle, guaranteeing at least one photon pair production per run.
Researchers have successfully controlled the electrical properties of Weyl semimetals using light, which can be used to create new electronic devices. The discovery was made possible by developing a theoretical framework that explains how light interacts with these materials.
Researchers have developed a new method to create quantum light sources in atomically thin material layers, which will pave the way for optical circuits and potentially lead to applications such as quantum sensors, transistors, and secure encryption technologies.
Researchers at Washington University in St. Louis compared forward and reverse trajectories of superconducting circuits called qubits, finding that they follow the second law of thermodynamics and exhibit increasing entropy.
Scientists from the University of Bristol have developed a new platform for quantum simulators, enabling the creation of large-scale photonic circuits. The team demonstrated that small-scale silicon photonic circuits can generate and process unprecedented numbers of photons, paving the way for quantum machines to surpass classical supe...
Researchers at the University of Oregon have successfully created artificial atoms in white graphene, which can generate single photons and potentially lead to breakthroughs in all-optical quantum computing. The discovery enables the scalable fabrication of artificial atoms onto a microchip, working in air and at room temperature.
A new computer program can identify unwanted states in quantum computers, allowing users to check reliability without technical expertise. Researchers used the IBM Q Experience and dimension witnessing technique to demonstrate the method's accuracy.
A new study from ANU found that 2D materials can thrive in harsh space conditions, with one material even improving its properties after exposure to intense gamma radiation. This could lead to the development of lighter and more efficient solar cells, satellite electronics, and quantum light sources.
Researchers at Aalto University have successfully controlled energy losses and shifts in a high-quality superconducting resonator, allowing for increased dissipation rate on demand. This breakthrough has significant implications for the development of larger-scale quantum computers and innovative quantum technological devices.
Researchers at Delft University of Technology have created a quantum circuit that enables the detection of weak radio signals, which could revolutionize fields like radio astronomy and medicine. The breakthrough opens up possibilities for experiments that explore the interplay between quantum mechanics and gravity.
Researchers at Aalto University have successfully controlled quantum phenomena in a custom-designed electrical circuit called a transmon. They were able to make the transmon jump multiple energy levels in one go, achieving speeds close to the theoretically calculated quantum speed limit.
Researchers have developed a new technique to recover lost information in quantum systems by repeating experiments with slightly different noise characteristics. This method effectively reduces quantum noise without the need for additional hardware.
A team of scientists successfully simulated an arbitrary quantum channel for a superconducting qubit, allowing for controlled evolution in various physical environments. This breakthrough demonstrates the potential for this technology in future applications, including quantum computation and simulation.
Sandia National Laboratories has launched four new projects to advance quantum computing, including a 'testbed' for industrial and academic researchers. The projects focus on creating accessible components, high-level algorithms and tools to measure quantum hardware performance.
Researchers from Osaka City University have developed a quantum algorithm capable of performing full configuration interaction calculations for any open shell molecules in polynomial time, overcoming the exponential explosion challenge. This breakthrough enables practical applications of quantum computers in chemistry and physics.
Researchers at UPV/EHU designed a model of quantum artificial life that encodes quantum behaviors similar to living systems. The model, executed on an IBM ibmqx4 cloud quantum computer, simulates birth, self-replication, interaction between individuals and the environment.
Researchers create integrated quantum transceiver capable of sending and receiving quantum information over various waveforms, enabling fast, robust and photon-efficient quantum communications. The team aims to develop a single-chip system that can be used for both free space and optical fiber communication.
Researchers at UC Berkeley have developed a practical proposal known as random circuit sampling (RCS) to prove quantum supremacy in quantum computers. This technique uses complex mathematical constructs to demonstrate the 'quantum accent' of a device, making it difficult for classical computers to replicate.
Rare earth ions exhibit potential for storing quantum states and interacting with each other, enhancing computation capacity. Researchers aim to establish scalable quantum technologies using these elements.
Scientists have developed a quantum circuit that demonstrates the advantage of quantum computers over classical systems. The new design exploits quantum physics' non-locality to solve complex problems efficiently. This breakthrough brings us closer to realizing near-term experimental realizations of quantum algorithms.
A UMD team has received a $1 million grant to develop methods for generating single photons at room temperature in semiconducting carbon nanotubes. This project aims to create high-quality single-photon sources that can be integrated into solid-state devices, enabling new quantum research and technology.
Yale researchers successfully teleported a quantum gate between logical qubits, enabling deterministic inter-module operations and advancing modular quantum computing. This breakthrough is crucial for building large-scale, error-correctable quantum computers.
The researchers achieved a significant breakthrough in quantum computing by simulating a 64-qubit circuit using a novel partitioning scheme. This method reduces the computational complexity of quantum algorithms, enabling faster simulations and paving the way for future advancements in quantum machine learning and unsupervised learning.
Scientists have discovered that environmental noise can paradoxically maintain the coherence of quantum systems. Researchers at RIKEN Center for Emergent Matter Science used a three-particle system to demonstrate this phenomenon, which could help accelerate research into scaling up semiconductor quantum computers.
Researchers applied quantum machine learning to a real-world biological problem, predicting the strength of binding sites for transcription factors. The study demonstrated the potential of quantum computing for biology, with results consistent with current understanding of gene regulation.
Engineers at Rigetti Computing have developed a technique to reduce qubit interference, allowing for the creation of larger practical quantum processors. This breakthrough enables the retention of logical operations independent of the state of a large quantum register.
Researchers at the University of Sydney have discovered a 'quantum hack' that improves quantum error correction by up to 400 percent, allowing for more efficient computations. This breakthrough could lead to fewer physical qubits required for basic calculations, making practical quantum computers a reality.
The QUTIS Group has successfully simulated a particle collision in a large accelerator using a trapped-ion quantum computer. The experiment mimics the creation and annihilation of matter and antimatter, which are difficult to study using conventional computers.