HardwareTopologicalLane record
Microsoft Majorana 1
8physical qubits
First topological-qubit chip claimed; 8 topological qubits announced.
← All vendors
Quantum scorecard
Microsoft
TopologicalMicrosoft ships Majorana 1, 8 physical qubits, announced Feb 2025.
Latest activity on record: Oct 9, 2026
Published figures
Each figure names its device and links to where it was published.
Qubit count over time
1 announced device, by announcement date. Records such as logical-qubit demonstrations are listed below, not plotted. The line traces the largest device to date.
Every milestone on record
1 entry, newest first.
| Date | Device |
|---|---|
| Feb 2025 | Majorana 1First topological-qubit chip claimed; 8 topological qubits announced.8 physical qubitscuratedSource — Majorana 1 |
curated: from the code-reviewed milestone list, sourced to the vendor · reviewed: a news-surfaced milestone an editor published · Wikipedia: synced from Wikipedia's list of quantum processors.
Recent headlines
- Microsoft Says PKI, HSMs and Security Appliances Must Prepare for Post-Quantum AuthenticationCybersecurity News · Oct 9, 2026
- Microsoft opens Majorana quantum chips to DARPA for independent testingDealroom.co · Oct 3, 2026
- Microsoft names winners in its Quantum Pioneers software trackQuantum Zeitgeist · Oct 3, 2026
Not on record for Microsoft yet: two-qubit fidelity, a published roadmap, a live fleet API, metriq-gym benchmarks, funding rounds.
Quantum · Timeline
Microsoft, in order
Everything the site tracks for Microsoft — hardware, records, advantage claims it took part in, funding and its own roadmap — newest first.
Newest on the timeline
20251 event
That is the whole timeline: 1 event.
Sources
What the units count
- Physical qubits
- The hardware qubits on the device, before any error correction.
- Atoms
- Neutral-atom vendors count the atoms trapped in the array; each one can act as a physical qubit.
- Algorithmic qubits (AQ)
- IonQ's own system-level metric: the widest circuit at which a fixed set of benchmark algorithms still succeeds. No other vendor publishes it.
- Logical qubits
- Error-corrected qubits, each encoded across many physical ones. The codes differ between demonstrations, so two records rarely mean the same thing.
- Quantum volume
- A system-level score (a power of two) from square random circuits. Vendors run it under their own assumptions.
- Two-qubit gate fidelity
- How often a two-qubit gate does what it should, as a percent. The cards show the best published figure, with its device and source.