Andrea Grimaldi
Department of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences, University of Messina
Builder The claim is about what the hardware does, and the philosophy is left open
Andrea Grimaldi is a researcher in applied physics and unconventional computing at the University of Messina, Italy, working with Giovanni Finocchio on spintronic diodes, stochastic magnetic tunnel junctions, and hardware Ising machines.
In 250 Magnetic Tunnel Junctions-Based Probabilistic Ising Machine (Nature Communications, 2026, doi:10.1038/s41467-026-72020-8, arXiv:2506.14590), Grimaldi, Shuhan Yang, Giovanni Finocchio, Hyunsoo Yang, and colleagues engineered a hybrid spintronic-FPGA probabilistic Ising machine driven by 250 spin-transfer torque magnetic tunnel junctions (STT-MTJs). Grimaldi’s work on the platform’s annealing schedules and cluster parallel update algorithms showed that mapping simulated quantum annealing onto physical spintronic p-bits increases ground-state solution quality by a factor of 20 compared to standard simulated annealing while suppressing errors from magnetic device fabrication tolerances.
Grimaldi is classified as a Builder on this site. His research bridges nanoscale magnetic device physics and programmable Monte Carlo sampling architectures for thermodynamic and probabilistic computing.
Known for. Spintronic probabilistic computing, 250-MTJ Probabilistic Ising Machine, simulated quantum annealing on p-bits
Coverage on this site
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- Shuhan YangDepartment of Electrical and Computer Engineering, National University of Singapore250-MTJ Probabilistic Ising Machine, spin-transfer torque magnetic tunnel junction p-bits, cluster parallel annealing
- Giovanni FinocchioDepartment of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences, University of MessinaSpintronic neuromorphic and probabilistic computing, 250-MTJ Probabilistic Ising Machine, micromagnetic solver development
- Hyunsoo YangDepartment of Electrical and Computer Engineering, National University of SingaporeSpintronics and magnetic tunnel junction fabrication, 250-MTJ Probabilistic Ising Machine, spin-orbit torque devices
- Navid Anjum AaditDepartment of Electrical Engineering, Stanford University (present address); previously University of California, Santa BarbaraFirst author of the sparse Ising machine on FPGAs (Nature Electronics, 2022) and of the programmable probabilistic computer with one million p-bits (arXiv 2606.25313, 2026)
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Andrea Grimaldi is listed with the other builders, who hold that the claim is about what the hardware does, and the philosophy is left open. The positions themselves are set out in the index of consciousness theories. Every researcher covered on this site is indexed in the directory of consciousness researchers.