Toshiba’s Double-Transmon Coupler for Superconducting Quantum Computers Achieves 99.9% Fidelity

Insider Brief: Toshiba and RIKEN successfully developed the Double-Transmon Coupler, achieving a two-qubit gate fidelity of 99.90%. The coupler improves gate speed (48 ns), extends coherence time, and reduces residual coupling strength to 6 kHz, addressing existing challenges in superconducting quantum computers. The Double-Transmon Coupler supports stable, easy-to-manufacture fixed-frequency transmon Read more…

Korean Researchers Implement Molecular Structure-level Quantum Simulations Using a Single Photon Qudit

Insider Brief Researchers at the Korea Institute of Science and Technology (KIST) have developed a qudit-based quantum computing algorithm that achieves chemical accuracy in estimating interatomic bond distances and ground-state energies without requiring additional error mitigation techniques. Unlike conventional quantum computing methods using qubits, the team utilized high-dimensional qudits to Read more…

The Classical-Quantum Connection: Scientists Link Quantum Processors With Real-Time Classical Connection

Insider Brief Researchers report they linked two 127-qubit quantum processors using a real-time classical connection, effectively creating a 142-qubit system capable of computations beyond the limits of a single processor. The experiment used dynamic circuits and circuit cutting to overcome hardware limitations, demonstrating modular quantum computing with enhanced error mitigation. Read more…