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Logical Qubits

All articles tagged with #logical qubits

technology1 month ago•3 min saved

IBM Demonstrates Quantum Advantage with 70 Logical Qubits in 15 Minutes

IBM and the University of Chicago used a 70-qubit logical-qubit, error-corrected quantum circuit to perform a classically intractable calculation in about 15 minutes, far faster than practical classical methods. They also introduced a structured verification approach that preserves the problem’s hardness while enabling error detection, addressing a major challenge in proving quantum advantage. The work, involving 2,415 logical two-qubit operations and 468 logical T gates, showcases large-scale encoded quantum computing and moves toward more trustworthy, scalable quantum machines.

via Science Daily|

#logical-qubits #quantum-advantage #quantum-computing

science6 months ago•9 min saved

Silicon quantum chip demonstrates full, error-detecting logical operations

Shenzhen researchers built a silicon-based quantum processor with four physical qubits encoding two logical qubits that can detect errors during computation, completing a full chain of operations and running a water-molecule ground-state algorithm via the Variational Quantum Eigensolver; this marks a milestone toward fault-tolerant, scalable silicon quantum computing, with next steps to increase qubits and reduce interference, as reported in Nature Nanotechnology.

via Interesting Engineering|

#error-detection #fault-tolerance #logical-qubits

technology1 year ago•7 min saved

Google's Quantum Leap: New Chip Achieves Unprecedented Stability

Google's quantum computing team has achieved a significant milestone by stabilizing an error-corrected quantum bit for an hour using their new Willow chip, which features 105 qubits. This advancement demonstrates the potential of quantum error correction to support complex algorithms. Google has also invested in its own fabrication facility to enhance process control and reduce noise in its superconducting processors. The work highlights the exponential improvements in error correction as more hardware qubits are dedicated to a single logical qubit, paving the way for more reliable quantum computing.

via Ars Technica|

#error-correction #google #logical-qubits

quantum-computing2 years ago•4 min saved

"Room Temperature Photonic Quantum Computing Breakthrough Unleashes Flying Quantum Bits"

Researchers have developed a new photonic approach to quantum computing that operates at room temperature and uses laser pulses to create inherently error-correcting logical qubits, simplifying quantum computing. This method, demonstrated by a team of researchers, shows promise in addressing the challenges of insufficient qubits and susceptibility to external influences, but further improvements in error tolerance are needed.

via SciTechDaily|

#error-correction #laser-pulses #logical-qubits

quantum-computing2 years ago•3 min saved

"Revolutionizing Quantum Computing: Building Reliable Qubits with a Single Laser Pulse"

Scientists have made a breakthrough in quantum error correction by creating an error-free quantum bit, or qubit, from a single pulse of light, potentially paving the way for light-based room-temperature quantum computers in the future. This development could address the instability and failure issues associated with traditional qubits, which are typically made from superconducting metals and require near absolute zero temperatures for stability. The new approach involves creating a logical qubit from a single laser pulse containing multiple entangled photons, offering inherent error correction capabilities. While the experimental results are promising, further research is needed to achieve the error-correction levels required for practical use in quantum computing.

via Livescience.com|

#error-correction #logical-qubits #photonic-qubits