Magne

Raveh Neeman

doi:10.5281/zenodo.22674814

Atom Computing + Microsoft, for QuNorth · neutral atoms · ANNOUNCED (facility completed and installation begun Sep 2026; fully operational spring 2027) (Sep 2026) · 1225 physical qubits · access: on-premise, Danish-owned

architecture: Rydberg tweezer array — alkaline-earth(-like) (Yb/Sr), erasure-native · Open on the map

Register profile — the machine's variant of its architecture

qubit type: Yb-171 nuclear-spin qubit

gate mechanism: Rydberg-blockade CZ

connectivity: tweezer grid with AOD moves

control: SLM tweezers + AOD moves; Microsoft supplies the QEC layer, middleware, compiler and control electronics

control placement: optics (room temperature)

readout: fluorescence imaging

gate evidence: no published figure

decoder mode: planned — named in a roadmap only

flags: no numbers published, a target, not a device

Technologies by layer — the machine's cell per layer

1 Qubit carrier	Alkaline-earth(-like) atom (Yb/Sr) — erasure-native · primary ▨ 🔎 ¹⁷¹Yb nuclear-spin qubits; 1,225 neutral atoms (full Gen-2 grid)
2 Encoding	Hyperfine / clock-state qubit · primary ◌ 🔎 ¹⁷¹Yb nuclear-spin levels (family-determined)
3 Gate mechanism	Rydberg-blockade CZ · primary ▨ 🔎 Rydberg-blockade CZ; no performance figures published
4 Connectivity / transport	Atom transport by AOD tweezers (zoned architecture) · primary ▨ 🔎 tweezer grid with AOD moves (1,225-site Gen-2 grid)
5 Control	Laser + AOD/SLM optical control (atoms) · primary ▨ 🔎 SLM tweezers + AOD moves, room-temp optics; Microsoft supplies control electronics, compiler, middleware
6 Readout	Fluorescence imaging of atom arrays · primary ◌ 🔎 fluorescence imaging (family-determined) Mid-circuit erasure check · alternate ◌ 🔎 erasure detection by imaging (family-determined); not stated for Magne
7 Code	Erasure-adapted codes · primary ▨ ✅ Microsoft QEC layer; 50-logical-qubit target, 'Level 2'; no performance figures published; ready end-2026 Rotated surface code (+ yoked variants) · alternate ▨ 🔎 Microsoft QEC layer; code not disclosed; 50 logical qubits is a target, not demonstrated
8 Decoder	Correlated / loss-aware decoding (transversal, atom loss) · primary ▨ 🔎 Microsoft stack decoder; planned MWPM / Sparse Blossom (+ correlated matching) · alternate ▨ 🔎 Microsoft stack decoder; planned
9 Interconnect	— none — nothing in this layer ◌ 🔎 monolithic single module, no interconnect
10 Manufacturing	Optical / mechanical assembly (lasers, vacuum, objectives) · primary ◌ 🔎 room-temperature optical/vacuum assembly (family-determined)

evidence: ✅ 1 / 13