Articles tagged with Qubits
Researchers have established theorems that guarantee whether a given machine learning algorithm will work as it scales up on larger computers. This breakthrough solves a key problem of useability for quantum machine learning and takes an important step toward achieving quantum advantage.
Researchers have made a breakthrough in developing passive quantum error correction, which could enable the creation of fault-tolerant quantum computers. The technology has the potential to revolutionize various fields, including artificial intelligence, materials science, and biochemical engineering.
Researchers at the University of Science and Technology of China and Tsinghua University successfully implement a five-qubit quantum error correcting code using superconducting qubits. They achieve high fidelity logical state preparation with an average value of 98.6%, verifying the viability of experimental realization of quantum erro...
The Wallenberg Centre for Quantum Technology is doubling its annual budget to SEK 80 million, enabling the development of a more powerful quantum computer. The new funding will focus on improving qubit quality and software, with plans to increase the number of researchers from 60 to 100.
Researchers successfully transferred entangled qubit states through a communication cable, paving the way for future quantum networks. The team achieved entanglement amplification via the cable, using superconducting qubits, and demonstrated a system that can send entangled quantum states with minimal loss of information.
Germany's Forschungszentrum Jülich and semiconductor manufacturer Infineon join forces to develop a semiconductor-based quantum processor using 'shuttling' of electrons. The QUASAR project aims to scale up quantum computing for industrial production.
Researchers at Max Planck Institute of Quantum Optics successfully interconnected two qubits over a 60-meter distance, enabling the first prototype of a distributed quantum computer. The breakthrough opens up a new development path for distributed quantum computing, potentially leading to more powerful systems.
Researchers discovered a new effect in qubits that may resolve the matter/antimatter discrepancy and improve quantum annealers' performance. The effect occurs when qubits pass through a phase transition, demonstrating that asymmetry is physically possible.
Scientists have successfully demonstrated a quantum computer demonstrator using Rydberg atoms, which can perform computing operations with high precision and scalability. The research uses sophisticated laser systems to control and entangle qubits, paving the way for the development of a functional quantum computer.
Researchers at Forschungszentrum Jülich and RWTH Aachen University have proposed a circuit for quantum computers that inherently protects against common errors through passive error correction. This design enables the creation of a large number of qubits, crucial for building a universal quantum computer.
A team of researchers used a quantum computer to explore non-Hermitian quantum mechanics and demonstrated experimental results that are forbidden by regular Hermitian quantum theory. They also showed that entanglement can be altered in a way that is not possible under regular quantum physics.
A Berkeley Lab team successfully simulated a complex aspect of particle collisions using a quantum algorithm, accounting for neglected quantum effects. The researchers' approach meshes quantum and classical computing, allowing for efficient resources and improved accuracy.
Researchers from UMass Amherst have successfully demonstrated spontaneous quantum error correction, a significant breakthrough in the development of powerful fault-tolerant quantum computers. This achievement paves the way for potential advances in fields like new materials discovery, artificial intelligence, and biochemical engineering.
Researchers at the University of Sydney and Microsoft have created a single chip that can generate control signals for thousands of qubits, revolutionizing quantum computing. This breakthrough resolves a key limitation to scaling up quantum machines, paving the way for more powerful computers.
The researchers propose creating quantum bits by implanting magnetic atoms into a crystal lattice, enabling faster and more defined qubits. This design concept addresses the stability issue of traditional quantum computers, making them less error-prone and up to ten times faster.
Boulat Bash demonstrates how quantum methods can substantially increase reliable information sending over covert channels. By applying quantum resources to sensing, he identifies the 'sweet spot' where high noise and low power levels are beneficial for covert operations.
Researchers at the University of Tartu have discovered a way to create ultrafast optical quantum computers using rare earth ions. The new method uses microcrystals synthesised on the basis of mixed optical fluoride crystal matrices, enabling faster computation and fewer errors compared to earlier solutions.
Researchers at the University of Innsbruck have successfully entangled two quantum bits coded on a lattice, a crucial resource for quantum computers. This achievement demonstrates key technology for future fault-tolerant quantum computers using lattice surgery.
Physicists have developed a switchable qubit that can be tuned between a stable storage mode and a fast calculation mode, enabling the creation of powerful quantum computers. The new qubit technology allows for ultrafast spin manipulation, potentially reaching clock speeds comparable to conventional computers.
Researchers have successfully created a two-dimensional array of quantum dots, enabling single electron control and paving the way for efficient implementation of quantum error correction routines. The achievement marks an important step towards building a working quantum computer.
Researchers at Aalto University have designed an ultra-thin material that creates elusive Majorana quantum states, which could be key to making topological qubits. The team successfully trapped electrons together in a two-dimensional material, overcoming the challenge of noise tolerance in quantum computing.
Researchers from the University of Cambridge discovered a hidden symmetry in quantum systems that allows entangled particles to remain linked despite noise. This finding could lead to the development of ultra-powerful quantum computers by preserving quantum effects in noisy environments.
Researchers at Northwestern and UChicago develop a new method to create tailor-made qubits by chemically synthesizing molecules that encode quantum information into their magnetic states. This bottom-up approach could lead to extraordinary flexibility and control, paving the way for next-generation quantum technology.
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.
The study successfully demonstrated an optimal entanglement collective measurement that reduces quantum backaction to zero in a two-qubit system under strongly coherent evolution. The experiment achieved high fidelity of 98.5% and marks a significant advancement in the field of quantum thermodynamics.
Researchers at a new DOE center are developing cutting-edge quantum sensing devices to unravel the mysteries of quantum materials. The devices will allow scientists to probe materials with pairs of photons or electrons, paving the way for discovering new quantum materials and inventing more sensitive probes.
Physicists at ETH Zurich have demonstrated a new method for delivering multiple laser beams precisely to the right locations in a stable manner, allowing for delicate quantum operations on trapped atoms. The approach enables high-fidelity logic gates and scalability for large quantum computers.
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.
Physicists at Aalto University have developed a new detector that can measure energy quanta with unprecedented resolution, overcoming limitations in current state-of-the-art detectors used in quantum computers. The graphene bolometer achieves speeds of well below a microsecond and higher theoretical accuracy than voltage measurements.
Researchers have created a new material that induces topological superconductivity in the absence of an applied magnetic field, opening up new possibilities for quantum computing. This breakthrough could lead to better understanding and applications in medicine, catalysts, or materials.
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 have developed techniques to detect and correct loss of qubits in real-time, protecting fragile stored quantum information. The approach combines quantum error correction with correction of qubit loss and leakage, enabling robust quantum computing.
The European project SEQUENCE is developing electronic devices and circuits compatible with low temperature operation for scaling up quantum computers. The project combines Si CMOS, III-V, and 3D integration technologies to support superconducting and spin qubit-based quantum computing.
Researchers at Tohoku University have developed a new quantum technology that allows qubits to hold information for 10 milliseconds, 10,000 times longer than the previous record. This breakthrough has significant implications for the development of large quantum computers.
Researchers at Caltech demonstrate a molecular approach to quantum computing that leads to fewer errors, using molecules instead of atoms. The method involves rotating molecules in superposition, allowing for simultaneous correction of orientation and angular momentum shifts, which are prone to causing errors.
The Co-Design Center for Quantum Advantage (C2QA) will develop quantum technologies to serve as the platform for future computing innovations. Princeton faculty members, including Andrew Houck and Nathalie de Leon, will lead major leadership roles in the center.
A multidisciplinary research team found that low-level ionizing radiation degrades superconducting qubit performance. To maintain coherence and achieve practical quantum computing, radiation shielding will be necessary. Researchers emphasize the need to exclude radiation-emitting materials and consider underground experimental setups.
Researchers at MIT have found that cosmic rays and low-level environmental radiation can cause decoherence in superconducting qubits, limiting their performance. This effect could limit the practicality of quantum computing within a few years, prompting scientists to explore shielding or design improvements.
The team created a new routing algorithm that allows qubits to directly interact with many more qubits, giving rise to higher expected computational power. This approach outperforms the 'superconducting' devices in calculating the expected computational power.
A University of Arizona team advances low-density parity check codes for quantum computers, enabling fault-tolerant and ultra-fast computation. The development is crucial for solving complex equations and analyzing phenomena that classical computers can't handle.
Yale physicists have developed an error-correcting cat, a quantum device that encodes information in a single physical system to suppress phase flips. The device uses a clever way to encode information, allowing it to prevent errors and correct them on command.
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.
MIT researchers develop an on-off system that allows for low-error quantum computations and rapid sharing of quantum information between processors. The system uses 'giant atoms' made from superconducting qubits, enabling high-fidelity operations and interconnection between processors.
Researchers have demonstrated coherence times up to 10,000 times longer than previously recorded for spin-orbit qubits, making them an ideal candidate for scaling up silicon quantum computers. Strong spin-orbit coupling is key to achieving stable qubits and robust quantum information.
Researchers at MIT have developed a hybrid process to manufacture and integrate 'artificial atoms' with photonic circuitry, producing the largest quantum chip of its type. The process enables scalable production of millions of quantum processors needed for quantum computers.
Researchers at USTC successfully control spin qubit lifetime by tuning the external magnetic field direction, improving it by over two orders of magnitude. The breakthrough opens up new directions for optimizing readout and multi-qubit extension of silicon-based spin qubits.
Researchers from the University of Rochester and Purdue University have successfully demonstrated quantum teleportation using electrons, paving the way for future research on this technology. The technique involves entangled pairs of electrons, which can be used to transmit information in semiconductors.
Researchers adapt robotics techniques to efficiently assess quantum device performance, stabilizing the emerging technology. This innovative approach outperforms simplistic characterisation in complex simulated environments.
Researchers developed a new computational tool to predict spin dynamics in materials, enabling rapid design and identification of suitable materials for quantum computing applications. The approach has been applied to various materials, including silicon, iron, graphene, molybdenum disulfide, and gallium nitride, with promising results.
Researchers at Columbia University have developed a high-performance non-reciprocal device on a compact chip, achieving performance 25 times better than previous work. This breakthrough enables the creation of novel components such as circulators and isolators for two-way communication, doubling data capacity in wireless networks.
Physicists at NIST successfully entangled a charged molecule and an electrically charged atom, showcasing a way to build large-scale quantum computers and networks. This breakthrough enables versatile quantum information systems by connecting quantum bits based on incompatible hardware designs.
Researchers at UCLA have developed a new qubit with nearly ideal properties, enabling ultra-low error rate quantum devices. This breakthrough should impact various areas of quantum information science, paving the way for large-scale NISQ devices.
A team of researchers from Tokyo University of Science proposes a novel solution to the qubit accessibility problem in quantum computing. They design a modified superconducting micro-architecture that simplifies the wiring system by arranging qubits in a 2D bi-linear array, reducing crosstalk and increasing efficiency.
Researchers have developed a new approach to speed up trapped ion quantum computing using giant Rydberg ions, increasing computational capacity exponentially. The experimental work confirms that the system can scale up without slowdowns, enabling large-scale quantum computation.
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.
Researchers have developed a novel error-correction scheme that takes advantage of bosonic symmetry to encode information efficiently. This approach could reduce the number of physical qubits required, enabling the scaling up of experimental quantum computers.
A team at Tokyo Medical and Dental University demonstrates a new method to increase the lifetime of qubits, enabling faster cycle times and reduced noise. This could lead to practical quantum computing applications in fields like finance and chemistry.
The University of California, Riverside, has been awarded $3.75 million to lead a collaborative effort in developing scalable quantum computers. The project aims to establish a novel platform for quantum computing that can scale up to many qubits, overcoming current limitations.