Articles tagged with Qubits
Researchers used a supercomputer to emulate Google's quantum processor and discovered a reachability deficit, a performance limitation induced by a problem's constraint-to-variable ratio. The study showed that future experiments will require significantly more quantum resources to overcome this limit.
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.
Researchers developed a new tool to analyze large superconducting circuits, allowing for the extraction of quantitative information previously inaccessible. The method uses a variational tight-binding approach to simulate circuit behavior, paving the way for further advancements in quantum computing.
A UTSA researcher has developed a theory behind the record-setting experiment, which demonstrates the most accurate entangling gate without lasers. This achievement enables more cost-effective and easier-to-use quantum computers, with potential applications in fields such as science, engineering, and finance.
A team of researchers at Purdue University developed ultrathin quantum sensors with 2D materials by applying a gold film to increase the brightness of spin qubits. This improved the contrast of their magnetic resonance signal and enhanced the sensitivity for detecting magnetic fields, local temperature, and pressure.
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 propose a time-sensitive network control plane as a key component of quantum networks, enabling real-time control and low costs. Industry applications include cybersecurity through quantum key distribution, but standardization and certification are needed.
Researchers at Berkeley Lab and UC Berkeley capture the first direct image of quantum spin liquid particles, called spinons and chargons. The discovery advances research on quantum computing and exotic superconductivity.
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.
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.
Researchers at Nagoya City University have detected strongly entangled pair of protons on a nanocrystalline silicon surface. This breakthrough could enable the creation of more qubits and ultra-fast processing for supercomputing applications, revolutionizing quantum computing.
Researchers have successfully demonstrated a new type of qubit that stores information in the oscillation amplitude of carbon nanotubes. This innovation has the potential to improve reliability in quantum computation by reducing interaction with the environment. However, experimental verification is still pending.
Researchers isolated emergent magnetic monopoles, a class of quasiparticles, by exploiting collective dynamics of qubits on a D-Wave quantum annealer. This breakthrough demonstrates the control and study of monopoles, which have been hypothesized but elusive until now.
Researchers have developed a programmable quantum simulator capable of operating with 256 qubits, a significant advancement in the field of quantum computing. The system enables the study of complex quantum processes and has already allowed for the observation of exotic quantum states of matter.
Researchers from Austria, Copenhagen, and Madrid found that a valid signal for Majorana zero modes, crucial for topological qubits, can be a false flag. By varying the nanowire setup, they discovered that a specific architecture causes a mimicking signal, leading to a crucial step forward in understanding nanowires.
Researchers at NUST MISIS and other institutions have experimentally proved the existence of a new type of quasiparticle - doublon topological excitations - in qubit chains. This discovery could be a step towards disorder-robust quantum metamaterials.
Researchers from the University of Copenhagen have developed a new technique to store qubits of light at room temperature, a major breakthrough in quantum research. This innovation enables the storage of qubits for milliseconds instead of microseconds, saving power and resources.
Correlated errors in quantum computers indicate a problem that must be acknowledged and addressed for fault-tolerant development. The study suggests that simple design changes can mitigate local effects, but the bigger concern is what could happen next.
Researchers have developed an unconventional method for controlling solid-state spin qubits using anti-Strokes (AS) excitation, which reduces the energy requirement compared to conventional Strokes excitation. This breakthrough enables improved quantum information processing and high-sensitivity quantum sensing capabilities.
Researchers created a new qubit by manipulating hole spins in a germanium layer, enabling faster processing speeds and reduced magnetic field requirements. This breakthrough could lead to the development of more efficient quantum computers combining semiconductors and superconductors.
Researchers experimentally show that quantum methods have an advantage over classical counterparts in sensor classification, reducing errors by a small margin. The discovery opens up possibilities for real-world applications such as biomedical imaging and autonomous driving.
Researchers have successfully demonstrated the coexistence of magnetism and superconductivity in graphene, opening a pathway towards graphene-based topological qubits. This breakthrough finding enables the creation of Yu-Shiba-Rusinov states, which are crucial for achieving topological superconductivity.
Researchers emphasize the need for material advances in quantum computing hardware to create complex qubits. The study explores various materials and proposes strategies for tackling technological challenges. Sophisticated control of these materials is crucial for achieving quantum advantage.
Researchers at KIT and Chimie ParisTech/CNRS create light-addressable qubit using europium(III) rare-earth ions, advancing quantum computer development. The molecule's nuclear spin levels can be polarized with light, enabling efficient processing of data in parallel.
Researchers have optimized a second-year physics project to effectively double its capacity to correct errors in quantum machines. The simple yet ingenious change has been adopted by Amazon's quantum computing program and Yale University, enabling a shorter timeline for achieving scalable quantum computation.
The team successfully controlled spin defects in a layered crystal of boron nitride, even at room temperature. This achievement opens up new avenues for precise measurements of local electromagnetic fields, with potential applications in medicine, navigation, and information technology.
Harvard University researchers have extended the lifespan of a dipolar molecule, enabling stable qubits for quantum computing and simulation applications. The new method allows for controlled individual atom interactions, granting scientists a key resource for molecule-based quantum information processing.
Researchers develop innovative spin-to-charge conversion method to achieve high-fidelity readout of qubits, surpassing traditional resonance fluorescence method with an error rate of 4.6%. This breakthrough enables the realization of fault-tolerant quantum computing and improves detection efficiency for quantum sensors.
Researchers propose using electron holes as a solution to operational speed/coherence trade-off in quantum computing. Theoretical studies predict holes can be used to create robust quantum bits with optimal operation points for ultrafast and highly coherent performance.
A single qubit on a standard silicon transistor chip has been successfully demonstrated as 'quantum capable' in a new study. The researchers were able to isolate and measure the quantum state of a single electron in a silicon transistor manufactured using existing manufacturing processes.
Researchers from QuTech at Delft University of Technology successfully demonstrated the control and coupling of four-qubit gates in a two-dimensional array of germanium-based semiconductor qubits. This achievement marks an important step toward dense, extended, two-dimensional semiconductor qubit grids.
Physicists at NIST have developed a system that uses optical fiber to control and read out a superconducting qubit, enabling the creation of a more powerful quantum computer. The method allows for the conversion of light signals into microwaves, which can be used to store and process information.
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.