superconducting-qubit fab (IQM); no machine-specific fab source
ראיות: ✅ 6 / 10
תמונות
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Three-panel paper figure made of drawings and data plots, from an arXiv paper by J. A. Montanez-Barrera, Kristel Michielsen and David E. Bernal Neira (2025-05-28) on benchmarking processors with linear-ramp QAOA. Panel (a) draws the qubit coupling graphs of 5-, 20-, 127-, 133- and 156-qubit processors, including IBM Heron devices; panels (b) and (c) plot approximation ratio against the number of QAOA layers. Notice the fixed nearest-neighbour lattices: the sparse heavy-hex patterns versus the denser square lattice limit which qubits can interact directly.“Fig. 3 — NL-based benchmarking using LR-QAOA for WMC problems; (a) QPU layouts used in each…” by J. A. Montanez-Barrera, Kristel Michielsen, David E. Bernal Neira, arxiv.org/abs/2502.06471, CC BY 4.0 (creativecommons.org/licenses/by/4.0/)Photograph of an open dilution-refrigerator insert (the 'chandelier') with its shields and vacuum cans removed: gold-plated stage plates hanging from a large top flange, each carrying rows of semi-rigid coaxial lines with coiled strain-relief loops, and flexible coax cables dangling below. Taken by Ragsxl (2020) and captioned 'IQM Quantum Computer in Espoo Finland'. It shows how many separate coaxial lines run from room temperature down through ever colder stages to the quantum chip, a wiring load that grows with every added qubit.“IQM Quantum Computer Espoo Finland” by Ragsxl, commons.wikimedia.org/wiki/File:IQM_Quantum_Computer_Espoo_F…, CC BY SA 4.0 (creativecommons.org/licenses/by-sa/4.0/)Photograph of an open dilution-refrigerator insert (the 'chandelier', radiation shields removed) beside an engineer touching its bottom cables with a gloved hand. The caption names him as IQM quantum engineer Jeffrey Chan; the photo was taken by Ragsxl in 2020. Notice the stacked gold-plated temperature-stage plates and the dense curtain of coaxial lines running down through them: each superconducting qubit needs its own control and readout lines from room-temperature electronics, and this wiring fills much of the fridge.“IQM Jeffrey Chan” by Ragsxl, commons.wikimedia.org/wiki/File:IQM_Jeffrey_Chan.jpg, CC BY SA 4.0 (creativecommons.org/licenses/by-sa/4.0/)