JUPITER supercomputer simulates a full 50-qubit quantum computer, setting a new benchmark for classical high-performance computing.
Europe’s first exascale supercomputer has just smashed a global quantum benchmark, simulating a full 50-qubit universal quantum computer for the first time.The feat pushes classical computing to its physical limits and marks a milestone for algorithm development long before mature quantum machines arrive.
The breakthrough comes from researchers at the Jülich Supercomputing Centre working with NVIDIA specialists.Their record surpasses the previous high of 48 qubits, also set by Jülich scientists, and demonstrates the immense capabilities of the new JUPITER system inaugurated in September.Quantum computer simulations serve as a proving ground for tomorrow’s quantum technologies.They allow scientists to explore molecular modelling methods like the Variational Quantum Eigensolver and optimisation approaches such as the Quantum Approximate Optimisation Algorithm , long before quantum processors can reliably run them.But simulating quantum circuits on classical machines is brutally difficult. Each added qubit doubles the memory and computing requirements, creating an exponential climb that rapidly overwhelms even elite hardware.Breaking classical boundariesA laptop can handle roughly 30 qubits. Simulating 50 demanded around 2 petabytes of memory and the full orchestration of JUPITER’s GH200 Superchips.“Only the world’s largest supercomputers currently offer that much,” said Prof. Kristel Michielsen. “This use case illustrates how closely progress in high-performance computing and quantum research are intertwined today.”The 50-qubit simulator precisely reproduces the physics of a real quantum processor.Each quantum gate affects more than 2 quadrillion complex numbers, all synchronized across thousands of computing nodes. That scale made earlier simulations nearly impossible.The breakthrough was driven by innovations in JSC’s simulation software, the Jülich Universal Quantum Computer Simulator .The new version, JUQCS-50, taps into the hybrid memory architecture of the NVIDIA GH200 Superchips, temporarily offloading data from GPU to CPU memory with minimal performance loss.A new byte-encoding compression method squeezes memory demands by a factor of eight, while a dynamic algorithm continuously optimizes data transfer among more than 16,000 Superchips during the simulation.“With JUQCS-50, we can emulate universal quantum computers with high fidelity and tackle questions that no existing quantum processor can yet solve,” said Prof. Hans De Raedt, lead author of the study.Building future infrastructureThe simulation will be integrated into JUNIQ, the Jülich UNified Infrastructure for Quantum Computing, where external researchers and companies will gain access to the tool. JUQCS-50 is expected to serve both as a research engine and as a benchmark for next-generation supercomputers.The project grew out of the JUPITER Research and Early Access Programme , where Jülich experts and NVIDIA engineers co-designed hardware and software during the supercomputer’s construction.“Through early collaboration, hardware and software could be co-designed during JUPITER’s construction phase,” said Dr. Andreas Herten.The JUPITER achievement represents a decisive step toward testing quantum algorithms at full scale using classical systems, and it sets the stage for rapid advances as quantum and high-performance computing converge.The study appears in arXiv.
Exascale Computing HPC Research JUPITER Supercomputer JUQCS-50 NVIDIA GH200 Quantum Algorithms Quantum Simulation
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