CTLE-Ising: A 1440-Spin Continuous-Time Latch-Based Ising Machine with One-Shot Fully-Parallel Spin Updates Featuring Equalization of Spin States

📋 论文概要

该论文提出了一种基于连续时间锁存器的伊辛机（CTLE-Ising），具有1440个自旋，并实现了单次全并行自旋更新，用于高效解决组合优化问题。相比超导量子比特伊辛机需要极低温和高功耗，该设计可在室温下低功耗运行。

💡 主要创新点

• 采用连续时间锁存器结构实现伊辛模型的自旋网络，避免了传统时序电路的限制。
• 提出一次全并行自旋更新机制，加快了收敛速度并提高了求解效率。
• 在室温条件下实现了1440自旋规模的伊辛机，兼顾了性能和功耗。

🏷 关键词

📄 原文摘要

*Equally Credited Authors (ECAs) The Ising machine is a hardware accelerator that finds solutions to combinatorial optimization problems (COPs) using the natural convergence behavior of the Ising model, which comprises artificial-spin network. A previous Ising machine, which is based on the quantum interactions between superconducting quantum bits (qubits) [1], implemented 2048 qubits, but it requires an extremely-low operating temperature (1520mK) and has significant power consumption (10-100kW). Recently, low-power Ising machines [2-4] operating at room temperatures have been developed using low-cost CMOS technologies. They implement discrete-time Ising machines using digital [2,3] or mixed-signal arithmetic circuits [4] to compute the spin operations sequentially. Hence, the performance of these Ising machines is limited by the number of spin-updates, which exponentially increase with the problem size (i.e., the number of binary COP variables).

👥 作者与机构

Jooyoung Bae*, Wonsik Oh*, Jahyun Koo, Bongjin Kim

University of California, Santa Barbara, CA