Papers for

quantum-inspired algorithm developers

Papers whose findings have a practical use for this group, as judged from the abstract. Open a paper to read what it means in practice.

Digital chip with 27,648 spins solves complex problems fast

A 28nm 27,648-Spin Multichip Digital Ising Accelerator with Pegasus Connectivity

Abstract: We present a 28nm digital Ising accelerator with 27,648 spins across four chips. A time-multiplexed spin-update array with local SRAM and scheduled interchip transfers delivers 41.5G updates/s at 1.2pJ/update. Degree-15 Pegasus connectivity and 10b coefficients increase native connectivity and precision over degree-8, 5b multichip annealers. Programmable couplings support optimization and probabilistic logic, with a four-chip planted-MaxCut trace reaching the solution for 27,069 nodes in 3.3$μ$s.

Mon 7 SeptHardware ArchitectureEmerging Technologies
The gist
Solving some kinds of problems can be very hard even for powerful computers. The paper describes a digital chip design that simulates a system called an Ising model with 27,648 spins spread over four connected chips. This system updates very quickly and can handle complex connections between spins, allowing it to solve big optimization problems in just microseconds. The authors show an example solving a large MaxCut problem efficiently using this setup.
Open → 2609.07907v1