A Scalable Annealing Processing Architecture for Fully-Connected Ising Models.

Combinational Optimization Problems (COPs) are prevalent in many different fields. Most of these problems are NP-hard and challenging for computers with conventional VonNeumann architecture. Ising machines with numerous spins have the potential to solve these problems by emulating the natural annealing process of solid matter. Recent research has explored the hardware implementation of Ising machines to accelerate the convergence process of such problems at room temperature. However, most of them are suffering from low scalability and low parallel processing capability due to the huge hardware cost and high complexity. In this paper, a scalable annealing processing architecture for Ising processor is described to address these issues with a NoC computing paradigm, a distributed storage scheme, and a fully pipelined structure design. The prototype is synthesized using FPGA with the maximum operation frequency of 270MHz, achieving about 32 times faster than conventional simulated annealing method when solving the max-cut problem.