Articles tagged with Qubits
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 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 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 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.
Researchers at QuTech have successfully integrated high-fidelity operations on encoded quantum data with a scalable scheme for repeated stabilization. They demonstrate that it is possible to compute as well as encode and stabilize qubits, a crucial step towards developing fault-tolerant quantum computers.
Scientists have made a breakthrough in controlling the formation of vacancies in silicon carbide, a semiconductor material. The team's simulations tracked the pairing of individual vacancies into a divacancy and discovered the optimal temperatures for creating stable divacancies. This discovery could lead to highly sensitive sensors an...
The ATIQ project aims to develop reliable, user-friendly quantum computing demonstrators based on ion trap technology within 30 months. The consortium will optimize hardware for applications in chemistry and finance, paving the way for new approaches in credit risk assessment.
Researchers at Lawrence Berkeley National Laboratory's Advanced Quantum Testbed demonstrated a method to reduce error rates in quantum algorithms, leading to more accurate and stable computations. The technique, known as randomized compiling, can suppress one of the most severe types of errors: coherent errors.
Researchers at Aalto University have developed a precise microwave source that operates at extremely low temperatures, potentially removing the need for high-frequency control cables. The new device could enable larger quantum processors with more qubits, increasing their potential applications in fields like computing and sensing.
Researchers at Harvard have successfully observed quantum spin liquids, a previously unseen state of matter that has been elusive for nearly 50 years. By manipulating ultracold atoms in a programmable quantum simulator, the team was able to create and study this exotic state, which holds promise for advancing quantum technologies.
Researchers at University of Helsinki have developed a new method to speed up calculations on quantum computers, reducing the number of measurements required and increasing efficiency. This breakthrough could lead to faster and more sustainable quantum computing.
Using 2D materials, researchers have built superconducting qubits that are significantly smaller than previous designs. The new capacitors store energy without interfering with qubit information storage. This breakthrough paves the way for smaller quantum computers and could lead to new applications of 2D materials.
Researchers created a new ultra-thin material with quantum properties emulating rare earth compounds. The material exhibits the Kondo effect, leading to macroscopically entangled state of matter producing heavy-fermion systems.
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 at Skoltech extend the adiabatic theorem to finite temperatures, ensuring more stable quantum dynamics. The findings have significant implications for next-generation quantum devices and computing.
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.
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.
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.
A team of researchers at Bristol's Quantum Engineering and Technology Labs has developed a silicon photonic chip that can protect quantum bits from errors using photons. This breakthrough could lead to the creation of more powerful quantum computers by reducing the fragility of 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.