KRISS 50-qubit-class superconducting system

Raveh Neeman

doi:10.5281/zenodo.22674814

Korea Research Institute of Standards and Science

KRISS 50-qubit-class superconducting system

Korea Research Institute of Standards and Science · superconducting circuits · ANNOUNCED (50-qubit model shown at Quantum Korea 2026; working status unconfirmed) (Mar 2026) · 50 physical qubits · access: n/a

architecture: Transmon lattice with tunable couplers · Open on the map

Register profile — the machine's variant of its architecture

qubit type: not published

gate mechanism: not published

connectivity: not published

control: not published

readout: not published

gate evidence: no published figure

flags: specification absent, a target, not a device

Technologies by layer — the machine's cell per layer

1 Qubit carrier	Transmon · primary ▨ 🔎 superconducting track named for the 50-qubit-class target; qubit type not published
2 Encoding	Bare physical qubit (no encoding) · primary ◌ 🔎 bare two-level subspace assumed (family-determined)
3 Gate mechanism	— undisclosed — exists, nothing published ◌ 🔎 no gate mechanism or fidelity published for the target
4 Connectivity / transport	Static nearest-neighbour lattice · primary ◌ 🔎 topology not published; static nearest-neighbour on-chip coupling assumed
5 Control	Room-temperature electronics + per-qubit coax/flex · primary ◌ 🔎 room-temperature RF control assumed (family-determined)
6 Readout	Dispersive microwave readout (+TWPA, Purcell) · primary ◌ 🔎 dispersive readout assumed (family-determined)
7 Code	— none — nothing in this layer ◌ 🔎 no QEC code planned for the 50-qubit class in the source
8 Decoder	— none — nothing in this layer ◌ 🔎 no decoder; no QEC planned
9 Interconnect	— none — nothing in this layer ◌ 🔎 no inter-module link described
10 Manufacturing	Superconducting-qubit lithography (Al/AlOx/Al junctions, Nb wiring, 300 mm) · primary ◌ 🔎 superconducting-qubit fabrication assumed (family-determined)

evidence: ✅ 0 / 10