Articles tagged with Qubits
Molecular qubits are more stable in asymmetric environments, according to a study published in Physical Review X. This discovery opens new doors for potential applications of emerging technology. The asymmetric environment provides coherence protection, allowing the qubits to keep their quantum information even in chaotic places.
The QuTech team engineered a record number of six silicon-based spin qubits in a fully interoperable array, achieving low error-rates through new chip design and methods. This advances scalable quantum computers based on silicon, contributing to the development of fault-tolerant quantum computing.
Researchers have developed a new error correction technique called MBE-CQEC, which uses continuous measurement to detect and correct quantum errors. This approach is potentially powerful for quantum computers, but still requires experimental validation and has limitations as the number of qubits increases.
Researchers at Toshiba Corporation achieved a breakthrough in quantum computer architecture with the development of a double-transmon coupler. This technology enables high-speed quantum computations with strong coupling and completely turns off residual coupling, improving accuracy and processing time.
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 at Princeton University have discovered a new method to correct errors in quantum computers, potentially clearing a major obstacle. The technique increases the acceptable error rate four-fold, making it practical for current quantum systems.
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.
Researchers at RIKEN have achieved error correction in a three-qubit silicon-based system, a major step toward large-scale quantum computing. This accomplishment demonstrates control of one of the largest qubit systems in silicon, providing a prototype for quantum error correction.
Researchers have developed new stable quantum batteries that can reliably store energy into electromagnetic fields. The micromaser system allows for efficient charging with protection against overcharging and preserves the stored energy's purity.
The University of Delaware and the University of New Mexico are collaborating on a $4 million grant to develop quantum photonics technologies. This initiative aims to prepare a skilled workforce for the growing quantum computing market, projected to grow from $486 million in 2021 to $3.2 billion by 2028.
Purdue researchers have created a 2D array of electron and nuclear spin qubits, enabling atomic-scale nuclear magnetic resonance spectroscopy and reading/writing quantum information with nuclear spins in 2D materials. This method harnesses three nitrogen nuclei at a time for longer coherence times than electron qubits.
Scientists have successfully implemented the world's fastest two-qubit gate in a quantum computer, achieving an impressive speed of 6.5 nanoseconds using cold atoms cooled to near absolute zero and optical tweezers. This breakthrough has significant implications for the development of ultrafast quantum computing hardware.
Researchers optimized the ZZ SWAP network protocol, introducing a new technique to improve quantum error mitigation. This enables more efficient execution of quantum algorithms like QAOA, which can solve combinatorial optimization problems.
Researchers at the University of Innsbruck developed a quantum computer that can perform arbitrary calculations using quantum digits (qudits), exceeding classical computers' efficiency. This innovation unlocks more computational power with fewer quantum particles.
Scientists at Simon Fraser University have made a breakthrough in developing quantum technology by observing over 150,000 silicon 'T centre' photon-spin qubits. This discovery enables the creation of massively scalable quantum computers and quantum internet that can connect them.
Researchers have demonstrated a significant improvement in fibre-integrated quantum memories, achieving an entanglement storage time of over 1000 microseconds. The fully integrated device enables the use of sophisticated control systems, allowing for improved scalability and compatibility with telecommunications infrastructure.
Researchers at the University of Colorado Boulder and NIST have successfully demonstrated reading out signals from superconducting qubits using laser light, preserving the qubit's information. This breakthrough could enable the creation of a quantum internet, allowing for secure communication over long distances.
The University of Illinois Chicago has joined the Co-design Center for Quantum Advantage, a US Department of Energy-funded center focused on building scalable quantum computer systems. The partnership will open new opportunities for UIC students in quantum engineering and collaboration with researchers.
Researchers at the University of Innsbruck have successfully implemented a universal set of gates on encoded logical quantum bits, enabling fault-tolerant quantum computing. The demonstration showcases two essential gates: CNOT and T-gates, which are crucial for programming all algorithms.
The Berkeley Lab team has demonstrated a three-qubit native quantum gate, the iToffoli gate, with high fidelity of 98.26%. This breakthrough enables universal quantum computing and reduces circuit running times.
Researchers at ETH Zurich successfully demonstrated a protocol for gentle, controlled measurement of mechanical quantum states in hybrid qubit-resonator devices. This breakthrough enables applications such as quantum error correction and more, paving the way for advanced technological innovations.
Researchers have demonstrated that ultra-thin topological insulator nanowires can act as a quantum one-way street for electrons, offering a significant step towards achieving topological qubits. This breakthrough enables highly stable qubits, the building blocks of future quantum computers.
Researchers have created a giant magnetochiral anisotropy effect in topological insulator nanowires, allowing for highly controllable current rectification. This discovery opens the pathway for technological applications and demonstrates a significant step towards achieving topological qubits.
Researchers found that some quantum computer chips are dangerously close to chaos due to improper disorder design. A delicate balance must be struck to safeguard device operation.
Researchers at Argonne National Laboratory have created a new qubit platform using solid neon, which offers a robust environment for electrons and demonstrates competitive coherence times. This breakthrough could lead to the development of future quantum computers with improved performance.
A team of scientists at Argonne National Laboratory has developed a new qubit platform formed by freezing neon gas into a solid and trapping an electron there. The platform shows great promise in achieving ideal building blocks for future quantum computers, with promising coherence times competitive with state-of-the-art qubits.
A team of scientists at Argonne National Laboratory has created a new qubit platform using neon gas, freezing it into a solid and trapping a single electron. The system shows great promise as an ideal building block for future quantum computers.
A Harvard-led team created a new method for processing quantum information that allows for the dynamic change of atoms' layout during computation, expanding capabilities and enabling self-correction of errors. This approach uses entanglement to connect atoms remotely and can process exponentially large amounts of information.
Fermilab engineers have developed a new control electronics system, known as Quantum Instrumentation Control Kit (QICK), to improve the performance of quantum computers while reducing costs. The system uses field-programmable gate array-based controls and has been shown to be faster and more cost-efficient than existing systems.
Researchers at the University of Copenhagen have developed a new position-based quantum encryption method that uses a person's geographical location to guarantee secure communication. This method makes it difficult for hackers to impersonate users and exploit online communications.
The study uses many-body perturbation theory to predict the optical properties of negatively charged boron vacancies in hBN, showing that phonons are largely responsible for luminescence. The results suggest that this defect can be used as a nanoscale thermometer with high temperature sensitivity.
Researchers have developed a key experimental device for future quantum physics-based technologies by coupling nanomechanical oscillators with qubits. This enables the manipulation of quantum states in mechanical oscillators, generating quantum mechanical effects that could empower advanced computing and precise sensing systems. The de...
Researchers discovered that light can trigger magnetism in normally nonmagnetic materials by aligning electron spins. This breakthrough could enable the development of quantum bits for quantum computing and other applications.
Researchers at Forschungszentrum Jülich successfully integrated a topological insulator into a conventional superconducting qubit, demonstrating a novel hybrid qubit. This breakthrough could lead to more robust and fast quantum computing systems.
Researchers at Princeton University have achieved an unprecedented level of fidelity in two-qubit silicon devices, paving the way for the use of silicon technology in quantum computing. The study's findings suggest that silicon spin qubits have advantages over other qubit types, including scalability and size limitations.
Researchers have discovered an elegant equation to approximate the coherence time of materials hosting spin qubits. The team can now estimate coherence times in seconds using just five material properties, facilitating a rapid exploration of new candidate materials.
Engineers from Intel and scientists from QuTech have successfully produced the first industrially manufactured qubit, leveraging industrial manufacturing facilities to overcome scalability hurdles. The achievement boasts high uniformity, few defects, and unprecedented device yield, paving the way for practical quantum computation.
The research team created silicon-based qubits using FinFET architecture that can store quantum information in two states at higher temperatures, allowing for scalability and integration into existing industry standards.
A UNIGE team has successfully stored a quantum bit for 20 milliseconds in a crystal-based memory. This achievement marks a major step towards the development of long-distance quantum telecommunications networks.
Researchers unveil an algorithm that reduces statistical errors in quantum chemistry calculations, allowing for accurate ground state energy calculation. This enables chemists to develop new materials for sustainable goals such as nitrogen fixation and hydrolysis.
The study shows that constructor-based irreversibility is compatible with quantum theory's time-reversible laws. Researchers used high-precision single-photon qubits to demonstrate this, confirming their theoretical predictions and numerical simulations.
University of Chicago researchers create hybrid array of neutral atoms from two different elements, allowing for easier measurement and manipulation of individual atoms. The hybrid design also enables the creation of a larger quantum computer with more qubits, which could lead to new insights into large-system quantum effects.
Researchers at Caltech developed a novel approach for quantum storage using nuclear spins, which can effectively chain up several atoms to store information. The system utilizes ytterbium ions and surrounding vanadium atoms to create a reliable quantum memory.
In a recent study, Dalla Torre and his team ran a collaborative mathematical game on different technologies to evaluate the systems' ability to demonstrate quantum mechanical properties. The Quantinuum System Model H1-1 outperformed classical results by returning correct answers 97% of the time.
Researchers at ETH Zurich have successfully implemented a novel measurement scheme for finite-energy states, extending the coherence time of a trapped ion quantum oscillator by a factor of three. This breakthrough addresses a major challenge in quantum computing and brings us closer to enabling fault-tolerant quantum computers.
Researchers have achieved a record breakthrough by preserving quantum states for over 5 seconds, utilizing silicon carbide, a widely available material. This advancement enables the development of scalable and cost-effective quantum innovation, including potential applications in quantum communication networks and quantum computers.
A €16 million project, PhotonQ, is developing a photonic quantum processor to process qubits and reduce error rates. The processor will enable rapid scaling to relevant qubit numbers for practical applications.
Scientists at Georgia Tech Research Institute have demonstrated a new approach for transporting trapped ion pairs through a single laser beam to create entangled qubits. This method reduces the need for multiple optical switches and complex controls, potentially simplifying quantum systems.
Researchers at MIT have developed ultrathin superconducting qubits using hexagonal boron nitride, enabling smaller devices with reduced interference. The material's defect-free structure reduces cross-talk, paving the way for thousands of qubits in a device.
Physicists at MIT have discovered a new type of qubit, where vibrating pairs of fermions can exist in two states at the same time. The qubits can maintain this state for up to 10 seconds, making them a promising foundation for quantum computers.
Researchers developed a tool to determine the minimum quantum computer size needed to solve problems like breaking Bitcoin encryption and simulating molecules. The estimated requirement ranges from 30 million to 300 million physical qubits, suggesting Bitcoin is currently safe from a quantum attack.
Scientists have compared electron distribution in two semiconductors to develop stable topological quantum bits for quantum computing. Indium antimonide shows a low electron density below its oxide layer, which is advantageous for forming Majorana fermions and creating compact, efficient quantum computers.
Researchers at QuTech have successfully implemented spin-based quantum processors in silicon with high-fidelity single- and two-qubit gates above 99.5%. This breakthrough amplifies the promise of semiconductor spin qubits as a leading platform for scalable and reliable quantum computing.
Researchers achieved a key milestone toward developing a fault-tolerant quantum computer by demonstrating a two-qubit gate fidelity of 99.5% using electron spin qubits in silicon. They found that specific Rabi frequencies enabled universal operations and high accuracy in performing quantum calculations.
Researchers at Sandia National Laboratories developed a precision diagnostic to detect and describe problems in quantum computing hardware. Using gate set tomography, they discovered new innovations that improve the reliability and accuracy of quantum processors.
Researchers have achieved 99% accuracy in quantum computing using silicon-based devices. The breakthrough enables the creation of large arrays of qubits capable of robust computations, overcoming a significant challenge in building reliable quantum computers.
Researchers at TU Delft and UNICAMP successfully teleported the quantum state of a single photon to an optomechanical device containing billions of atoms. This achievement paves the way for creating signal repeaters in a future quantum internet, enabling long-distance quantum communication.
Researchers develop technique to study singlet/triplet ratio of electron pairs in charge-separated states, which could lead to advancements in organic solar cells and qubits. The 'pump-push-pulse' method allows for snapshots of spin state at different times.
Physicists at Rice University have found telltale signs of antiferromagnetic spin fluctuations coupled to superconductivity in uranium ditelluride, a rare material promising fault-free quantum computing. The discovery upends the leading explanation of how this state of matter arises in the material.
Scientists at Aalto University found that Cooper pairs break in bursts with long periods of silence, and the rate of these events decreases over time. This discovery provides important clues about the source of energy that breaks Cooper pairs and could lead to improvements in superconductor devices.