Articles tagged with Qubits
Scientists are developing better manufacturing processes and control equipment for superconducting circuits and trapped ions. New materials like silicon spin devices and topological materials are also being explored to reduce noise and error in qubits.
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.
Researchers at Tohoku University developed an algorithm to improve the D-Wave quantum annealer's ability to solve complex combinatorial optimization problems. The new algorithm allows for larger subproblems, leading to more optimal solutions efficiently.
A research group led by Professor PAN Jianwei and LU Chaoyang successfully designed the largest planar code platform at present using photons, demonstrating path-independent property in optical systems. This work provides a platform for simulating braiding operations with linear optics, enabling further exploration of anyonic statistics.
Researchers at Penn State have developed a new method for measuring the quantum states of atomic qubits with unprecedented accuracy, achieving a fidelity of 0.9994. This breakthrough enables the development of more reliable and efficient quantum computers.
Researchers develop qubits based on semiconductors, showcasing high control fidelity and integration with classical CMOS technology. Challenges include effective readout methods, uniform materials, and scalable designs to overcome obstacles in achieving fault-tolerant quantum computing.
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.
Scientists have developed a method to swap electron spins between distant quantum dots, enabling fast interaction and space for pulsed gate electrodes. This breakthrough brings us closer to future applications of quantum information and potential quantum computers.
Researchers successfully reversed the state of a quantum computer a fraction of a second into the past and calculated the probability of an electron in empty interstellar space spontaneously traveling back into its recent past. The phenomenon occurs due to a random fluctuation in the cosmic microwave background, with the reverse evolut...
Two universities have collaborated to overcome a fundamental hurdle in building quantum computers in silicon. This collaboration opens the way for further development of machines at scale, enabling billions of qubits to be built in complex arrays.
Researchers demonstrated scrambling of information in a quantum computer, simulating the behavior of matter inside a black hole. They showed that entangled qubits could potentially be used to probe the mysterious interiors of black holes.
Purdue researchers have successfully probed interference of quasiparticles using a new device. The device, built with molecular beam epitaxy, overcomes technical challenges to observe quantum mechanical effects. This breakthrough may be key to developing topological qubits and advancing quantum computing.
A new measurement technique called COSPLI enables researchers to map and measure large-scale photonic quantum correlation with single-photon sensitivity, a critical step towards making photon-based quantum computing practical. The method uses CCD cameras and suppresses noise to detect signals from individual photons.
Researchers at ETH Zurich have developed a new way to encode qubits in trapped-ion mechanical oscillators, which could lead to more efficient quantum error correction. By exploiting the properties of periodically arranged oscillatory states, they can detect and correct errors with high precision.
The discovery represents a powerful mechanism for quantum computing and cryptography. Researchers developed an exponential-SWAP gate that can link encoded particles on demand, mitigating the limitation of previous designs and enabling flexible operations.
Researchers at the University of Sydney have demonstrated an order of magnitude improvement in reducing infidelity, or error rates, in quantum logic gates by using codes to detect and discard errors. This achievement opens a path to further improvements in quantum computers.
Purdue University researchers have developed a material that improves the stability of quantum bits by enhancing supercurrents on their surface. This innovation has potential to boost quantum computing's performance and accuracy.
Aalto University scientists have developed a new method to read information from qubits, the basic building blocks of a quantum computer. By applying two microwave pulses instead of one, they were able to complete the readout in 300 nanoseconds, faster than previously possible.
A team of Cambridge researchers controlled the sea of nuclei in semiconductor quantum dots, enabling them to operate as a quantum memory device. This achievement harnesses the interaction between electrons and nuclear spins, proving the nuclei can exchange information with an electron qubit.
A new hardware platform based on isolated electron spins in a two-dimensional material was demonstrated by researchers at the University of Pennsylvania. The system utilizes defects in sheets of hexagonal boron nitride to manipulate individual quantum states, enabling potential applications in quantum technology and sensing.
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 at UNSW's CQC2T have shown that they can build atomic precision qubits in a 3D device, achieving critical components of the 3D chip architecture. They demonstrated the feasibility of an architecture using atomic-scale qubits aligned to control lines inside a 3D design.
Researchers at MIT and elsewhere have recorded the temporal coherence of a graphene qubit, demonstrating a key step forward for practical quantum computing. The qubit maintained a superposition state for 55 nanoseconds before returning to its ground state.
Researchers have developed a hybrid device combining two types of qubits to solve the speed bottleneck in quantum computing. By integrating different qubit architectures, they achieved rapid initialization and coherent measurements, paving the way for more scalable devices.
Researchers describe an extended quantum Maxwell's demon that violates the second law of thermodynamics in a system up to 5 meters away from the device. The demon channels entropy away from a target qubit, reducing its disorder without affecting its energy.
Researchers at Friedrich Schiller University Jena have synthesized a molecule that can perform the function of a computing unit in a quantum computer. The molecule, a trinuclear copper complex, meets the condition of having a sufficiently long-lived spin state to be used as a qubit.
Researchers have discovered a new way to manipulate spin-orbit coupling in silicon to create compact and efficient qubits for large-scale quantum computing. This breakthrough enables fast read-out of the spin state of just two boron atoms in an extremely compact circuit, hosting all devices in a commercial transistor.
The researchers successfully demonstrated a new level of control over photons encoded with quantum information, performing distinct operations on two qubits in parallel. This breakthrough enables universal quantum computing and improves energy efficiency, stability, and control.
Researchers at USC have successfully implemented a method called dynamical decoupling to suppress erroneous calculations and increase the fidelity of results in quantum computers. The technique, which uses staccato bursts of energy pulses to offset ambient disturbances, improved final fidelity by threefold in IBM's 16-qubit QX5 computer.
Researchers at UNSW Sydney have developed a compact sensor for accessing information stored in individual atoms, reducing the number of connections and gates required for scale-up. This breakthrough enables more efficient and sensitive qubit readout, a crucial step towards scalable quantum computing in silicon.
Researchers successfully generate three-photon entanglement in three dimensions, increasing information capacity and paving the way for future technologies such as quantum computers and encryption. This breakthrough could enable teleportation of complex quantum systems and has significant implications for quantum communication networks.
Scientists at the University of Sussex have developed a method to reduce disruptive environmental effects on trapped ion quantum computers. The breakthrough enables the creation of large-scale quantum computers capable of solving complex problems, with potential applications in fields such as medicine, finance, and agriculture.
An Australian research team has experimentally realised a crucial combination of two fundamental quantum techniques on a silicon chip, confirming the promise of silicon for quantum computing. The integrated design combines single-spin addressability and a qubit read-out process vital for quantum error correction.
A team of physicists at the University of Konstanz has developed a theoretical concept to shield electric and magnetic noise, extending the coherence time of spin qubits. This enables thousands of computer operations to be carried out in fractions of a second, paving the way for more efficient quantum computing.
Researchers use artificial intelligence to develop a quantum error correction system that can learn from experience, outperforming traditional methods. The approach enables quantum computers to solve complex tasks by correcting errors in qubit states.
The University of Delaware is leading the charge in quantum technology research with a $1 million NSF grant. The team aims to develop quantum electronics that can process information faster and with greater accuracy, enabling next-generation technologies for communication, computing, and sensing.
Researchers have created a new method for measuring the state of qubits, a crucial step towards building powerful quantum computers. This breakthrough could lead to significant advancements in fields like pharmaceutical development and cryptography.
Researchers at University of Turku and University of Science and Technology of China have successfully controlled the flow of quantum information into the environment, preventing its disappearance. This breakthrough has significant implications for basic research and the development of quantum technologies.
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.
Scientists at the Weizmann Institute of Science have successfully demonstrated a logic gate that enables the exchange of information between photons and atoms, a breakthrough necessary for scaling up quantum computers. This achievement paves the way for the development of more powerful quantum computing systems.
A Rice University scientist has developed a new method to diagnose quantum computers, reducing the need for expensive measurements. This approach uses compressed sensing to minimize data while ensuring accurate results, making it possible to validate even large-scale systems.
A University of Queensland researcher led an international study to develop a programmable machine that can accomplish various tasks using reprogrammed settings, resulting in exponential changes.
A team of researchers at the University of Bristol has developed a silicon chip that can guide single photons to encode qubits, demonstrating a fully functional quantum processor. This breakthrough device shows promise for scalable and low-cost production of quantum computers.
Researchers at Yokohama National University have demonstrated fault-tolerant universal holonomic quantum gates, paving the way for fast and reliable quantum computing. The team achieved this breakthrough by manipulating a geometric spin qubit in an NV center, enabling precise control over long-lived quantum memories.
A team of scientists at ETH Zurich have found a way to avoid disturbances in qubit operations by coupling a microwave photon to a spin qubit. The researchers created a 'spin trio' consisting of three quantum dots and demonstrated strong coupling between the spin qubits and a microwave photon.
Scientists have successfully implemented an atomic engineering strategy to individually address closely spaced spin qubits in silicon, achieving dramatically different control frequencies. This breakthrough enables selective addressing of qubits, reducing errors and advancing the development of a silicon-based quantum computer.
The study demonstrates an interaction between a qubit and surface acoustic waves in the quantum regime, enabling an alternative approach to quantum computer design. This allows for smaller, more stable, and compact quantum computers without the limitations of microwave radiation.
A team from Aalto University creates a miniature 'heat valve' in a quantum system, enabling the controlled exchange of energy with external surroundings. This breakthrough aims to improve the efficiency of quantum heat engines and refrigerators.
Researchers have developed a refined magnetic sense using algorithms and hardware from quantum computation, achieving six times higher sensitivity than classical methods. The transmon qubit-based magnetometer uses adaptive phase-estimation schemes to measure the strength of external magnetic fields.
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.
Researchers at ETH Zurich have developed a method to transmit quantum states deterministically over short distances, paving the way for more efficient and secure quantum computing and cryptography. The transmission rate reaches 80% fidelity, enabling entanglement creation between qubits up to 50,000 times per second.
Researchers from Purdue University and the Technological University of Delft have discovered enhanced spin-orbit interaction in silicon, allowing for easier manipulation of qubits using electric fields. This enables the creation of silicon quantum computer chips with millions of qubits, leading to high-speed information processing and ...
Scientists at Oak Ridge National Laboratory successfully simulated an atomic nucleus using a quantum computer, demonstrating the ability of quantum systems to compute nuclear physics problems. The team extracted the deuteron's binding energy with high accuracy, despite challenges posed by inherent noise on the chip.
Researchers at Oregon State University have developed a new inorganic compound that adopts a crystal structure capable of sustaining a quantum spin liquid state. This discovery is a key step toward the creation of next-generation supercomputers, which will solve complex problems efficiently and consume less energy.
Researchers demonstrate a new algorithm to simulate quantum channels using IBM's cloud quantum computer, enabling efficient open system quantum simulation and exploring its applications in quantum communication. The method reduces gate complexity compared to Stinespring dilation, making it scalable for higher dimensions.
Yale researchers have achieved a major milestone in quantum computing by transmitting quantum data between two separate points using a new 'pitch-and-catch' technology. This innovation allows qubits to be interfaced with each other, enabling more complex algorithms and potentially faster computation speeds than classical computers.
Scientists have created a universal qubit design that can be used to build a quantum computer. The new superconductor qubit is based on a continuous superconducting nano-wire and has proven to be no worse than traditional designs in initial experiments.
Researchers in UCSB/Google group aim to demonstrate quantum supremacy with superconducting qubits, overcoming challenges of decoherence and error correction. Their goal is to build a qubit system capable of exploring complex states efficiently, enabling applications in condensed matter physics, chemistry, and materials.
Researchers from Kazan Federal University and Kazan Quantum Center have developed a multiresonator broadband quantum memory-interface with a record-breaking 16.3% efficiency at room temperature. The innovation has the potential to create universal memory solutions for quantum computers on superconducting qubits.