Fujitsu has successfully developed the world’s fastest quantum computer simulator capable of handling 36 qubit quantum circuits on a cluster system featuring Fujitsu’s “FUJITSU Supercomputer PRIMEHPC FX 700” (“PRIMEHPC FX 700”)(1), which is equipped with the same A64FX CPU that powers the world’s fastest supercomputer, Fugaku.
The newly developed quantum simulator can execute the quantum simulator software “Qulacs”(3) in parallel at high speed, achieving approximately double the performance of other significant quantum simulators in 36 qubit quantum operations. Fujitsu’s new quantum simulator will serve as an important bridge towards the development of quantum computing applications that are expected to be put to practical use in the years ahead.
基于这一突破，从4月1日，2022年4月1日，富士通和富士夫公司（以下简称Fujifilm）将开始联合研究材料科学领域的量子计算应用。
Moving forward, Fujitsu will accelerate its efforts to develop quantum computers with the aim of developing a 40 qubit simulator by September 2022 and conduct joint research and development of quantum applications with customers in fields including finance and drug discovery.
Vivek Mahajan，COSTER CORPITION SOWER，CTO，FUJITSU LIMITED，评论：“我们现在在计算技术的新时代的边缘站立。Fujitsu has successfully developed the world’s fastest quantum simulator by applying its world-leading expertise in computing technologies cultivated over many decades—most recently we put this knowledge to use to work with RIKEN to design the supercomputer Fugaku, which has remained the world’s fastest for the past two years. Moving forward, we aim to leverage this new quantum simulator for our customers to accelerate the development of quantum applications and ultimately contribute to a sustainable world by solving a range of issues facing society.”
New 36 qubit quantum simulator delivers world’s fastest processing speed
Fujitsu has developed a parallel and distributed quantum simulator for a cluster system consisting of 64 nodes on Fujitsu’s PRIMEHPC FX 700.
PrimeHPC FX 700配备了相同的A64FX CPU，可为超级计算机Fugaku提供支持3.072 TERAFLOPS（TFLOPS）的理论峰值性能，以双重精度浮点格式计算。它还具有32 GB的内存，具有每秒1,024千兆字节（GB）的高带宽，通过Infiniband连接节点，每秒12.5 Gb的速度。
The new quantum simulator utilizes “Qulacs,” one of the world’s fastest quantum simulator software developed by Osaka University and QunaSys Corporation, and the performance of memory bandwidth was maximized by executing multiple calculations simultaneously using SVE (Scalable Vector Extension) instructions when ported to the A64FX.
MPI（消息传递接口）（10）启用Qulacs的并行和分布式执行，并实现通过重叠计算和通信来最大化网络带宽的数据传输。Fujitsu进一步开发了一种新方法，可根据量子电路的进度有效地重新排列在集群上的分布式存储器中部署的Qubit状态及其计算有助于降低通信成本。除了“Qulacs”之外，新系统也与其他量子模拟器软件兼容。
Qiskit是Quantum Computer软件的主要开发工具之一，可用于富士通的Quantum Simulator，并为Quantum Software开发人员提供高度方便的开发环境。富士通计划与QuNasys进行合作，计划在新量子模拟器上提供公司的量子化学计算软件QAMUY，以提供各种高速量子化学计算的资源。
与富士夫省联合研究项目的概要
此外，Fujitsu和Fujifilm将开始对计算化学领域的量子应用联合研究，实现创新的材料设计方法。联合研究将利用富士通的新开发的量子模拟器研究和评估分子化学反应计算中特定于量子计算的算法。
期间：4月1日，2022年至3月31日，2023年
Purpose: Utilization of quantum computing technology in computational chemistry
研究内容：分子化学反应中量子计算特异性算法的检查和评价。
角色和责任：
Fujitsu:
·提供量子模拟器，分析计算结果和改进方法检查
富士夫：
・Implementation of quantum chemical calculations, analysis of calculation results and examination of improvement methods
Future Plans
向前发展，富士通将努力改进其技术，包括其量子栅融合技术，该技术能够同时对多个量子门进行计算，以实现更大的刻度和更高速度的量子模拟器。富士通进一步旨在开发40个QUBBIT模拟器，以便在金融和药物发现领域的应用到9月202222。富士通将在量子计算机开发中应用其在量子模拟器上开发的量子应用的累积知识，目的是实现早期解决方案使用量子技术的社会问题。
Comment from Prof. Keisuke Fujii, Division of Advanced Electronics and Optical Science, Graduate School of Engineering Science, Osaka University:
High-speed simulators using supercomputers are of ever-increasing importance in the development of the quantum software and quantum applications on which the performance of quantum computers depends. Qulacs, an open source software used by developers worldwide, and the technology at the heart of the supercomputer “Fugaku,” have been combined to realize the world’s fastest quantum simulator, which we are confident will greatly accelerate the future development of quantum software.
Comment from Yukihiro Okuno, Senior Researcher, Analysis Technology Center, Fujifilm:
量子计算机具有在计算化学字段中执行高度准确的计算，这不能由经典计算机执行。Fujifilm将作为一种可行性研究，以利用材料科学中的量子计算机进行可行性研究。
