PIAST-Q

Poznan Supercomputing and Networking Center (PCSS) · trapped ions · DEPLOYED (Jun 2025) · 20 physical qubits · access: national allocation (EuroHPC JU access for European users)

qubit type: optical qubit (40Ca+ S1/2–D5/2, 729 nm)

gate mechanism: laser-driven universal gates (mechanism not stated)

connectivity: all-to-all

control: lasers

control placement: room-temp (two 19-inch racks, air-cooled, under 2 kW)

gate evidence: no published figure

flags: no published error rates

1 Qubit carrier	Trapped atomic ion · primary ▨ ✅ 20 trapped ions manipulated by high-precision lasers; AQT system, species not stated
2 Encoding	Optical narrow-line qubit (ion S–D, atom clock) · primary ◌ §II The qubit system (AQT platform) 🔎 AQT-supplied laser-based trapped-ion system; 40Ca+ S1/2–D5/2 optical qubit by AQT platform lineage — no PCSS/AQT page names the product or the species
3 Gate mechanism	Mølmer–Sørensen / light-shift laser gate · primary ◌ 🔎 laser-driven universal gate set (family-determined); gate mechanism not named
4 Connectivity / transport	Ion-chain motional bus (all-to-all in chain) · primary ▨ ✅ all-to-all qubit connectivity among the 20 ions
5 Control	Free-space laser addressing of ions (AOM/AOD beams) · primary ◌ 🔎 laser control; addressing optics not stated (family-determined)
6 Readout	Fluorescence state detection (ions, defects) · primary ◌ 🔎 fluorescence detection (family-determined)
7 Code	— none — nothing in this layer ◌ 🔎 no QEC code run
8 Decoder	— none — nothing in this layer ◌ 🔎 no decoder; no QEC run
9 Interconnect	— none — nothing in this layer ◌ 🔎 single trap module in two 19-inch racks; no interconnect
10 Manufacturing	Ion-trap fabrication (surface-electrode chips; machined 3D blade traps) · primary ◌ 🔎 ion-trap fabrication (family-determined)

evidence: ✅ 2 / 10