Qubit Tracker
256-qubit superconducting quantum computer
256-qubit superconducting quantum computer in the Qubit Tracker: every value read on the maker's own pages, with its day.
- Announced
- 22 April 2025 — info.archives.global.fujitsu, read 16 October 2026
- Modality
- Superconducting — info.archives.global.fujitsu, read 16 October 2026
- Physical qubits
- 256 qubits — info.archives.global.fujitsu, read 16 October 2026
- Logical qubits
- Not confirmed: The cited maker pages do not report a demonstrated logical-qubit count, a quantum error-correction code, or a paper demonstrating logical qubits for this system.
- Two-qubit gate fidelity
- Not confirmed: The cited maker pages do not print a two-qubit gate fidelity with a named statistic.
- One-qubit gate fidelity
- Not confirmed: The cited maker pages do not print a one-qubit gate fidelity with a named statistic.
- The maker’s own metric
- Not confirmed: The cited maker pages do not report a named system-level metric such as quantum volume or #AQ.
- Access
- Cloud — global.fujitsu, read 16 October 2026
- Status
- Not confirmed: two readings disagree: available and announced
Sources
- Fujitsu and RIKEN develop world-leading 256-qubit superconducting quantum computer (read 16 October 2026)
- Quantum Computing by Fujitsu (read 16 October 2026)
- Fujitsu Hybrid Quantum Computing Platform (read 16 October 2026)