The world’s fastest 36-qubit quantum simulator using “Tomitake” supercomputer technology. Fujitsu-PC Watch

36-qubit quantum simulator using Tomitake technology

Fujitsu has announced that it has succeeded in developing the world’s fastest 36-qubit quantum simulator using “Tomitake” supercomputer technology. The company has indicated its intention to accelerate application development for the practical application of quantum computers and announced its intention to develop the world’s largest 40-qubit simulator by September 2022.

The world’s fastest quantum simulator announced this time is a 36-qubit quantum on a cluster system built with 64 nodes of Fujitsu’s PRIMEHPC FX700 supercomputer, which uses the “A64FX” CPU installed in Tomitake. Quantum simulation software “Qulacs” developed by Osaka University and QunaSys enables high-speed parallel distributed execution, achieving approximately twice the performance of leading quantum simulators in 36-qubit quantum operations. It is said that it will be possible to develop advanced quantum computing applications which should be put into practice in the future.

From April 1, 2022, in collaboration with Fujifilm, research on the applications of quantum computing in the field of computational chemistry will begin with the aim of realizing innovative methods of designing materials. He also revealed his intention to conduct joint research with five companies.

Mr. Hiroki Hara, General Manager, Fujitsu

Mr. Hiroki Hara, Managing Director and General Manager of Fujitsu, said: “In quantum computers, real 100-qubit class machines have already begun to be realized, but these are computers called NISQ, which are theoretical research and noisy on quantum algorithms. It is difficult to use in development. It is said that an error-tolerant quantum computer is needed to perform large-scale quantum computation, and that one million qubits are needed to perform it.

Therefore, in reality, the current situation is that quantum simulators using existing computers are widely used. “However, if a qubit is increased, the memory and the number of calculations will be doubled. “If the number of qubits is increased by 10, the memory will increase by 1024 times. Since the memory will increase exponentially by increasing the number of qubits, only about 30 qubits can be calculated by a normal computer. It is believed that we were able to overcome these issues by using HPC technology from Fujitsu.”

This quantum simulator is 1/2500 times larger than Tomitake, but it is a major quantum from other institutions such as Intel’s Quantum Simulator (Intel-QS) from Intel, JUQCS from Jülich Research Center in Germany and IBM’s Qiskit Aer. more than twice the performance of the simulator. In the future, he also plans to provide it as a cloud service.

Importance of quantum simulator

Quantum Simulator Challenges

Data shuffling technology for quantum computing

Quantum Simulator Features

“In the main quantum simulators of other institutions, the calculation that used to take a whole day can now only be done at night, and the speed of research and development can be greatly improved. Although it takes time to develop the real machine, the merit of being able to carry out advanced developments of quantum applications, it’s great.”

In the realization of the fastest quantum simulator in the world this time, the memory strip is obtained by simultaneously executing several calculations using the SVE (Scalable Vector Extension) instruction when porting the Qulacs used in the quantum simulation software to A64FX. . In addition, we have developed a data transfer technology that maximizes network bandwidth by interweaving computation and communication by running Qulacs in parallel and distributed by MPI (Message Passing Interface).

Moreover, we developed a new method to efficiently reorganize the state information of qubits extended in distributed memory on a cluster according to the progress of the quantum circuit and its computation. As a result, communication costs can be reduced.

Comparison with Intel Quantum Simulator

Comparison with JUQCS

Comparison with Quskit Aer

Development of quantum applications

“Up to 30 qubits can be processed by a computer, but if it exceeds that, communication will occur and a large delay will occur. With the data shuffling technology developed by Fujitsu that corresponds to quantum computing, the first computation can be performed. In the end, the amount of information after 30 qubits has been relocated in one go. The overhead has been greatly reduced. The interest of this technology is to be able to select the relocation method that can reduce the most the cost of communication.” ..

The method of rearranging data according to quantum calculation can also be applied to other quantum simulation software than Qulacs.

Fujitsu is accelerating the development of quantum applications, primarily in materials and finance, using this quantum simulator. We will do joint research with companies such as Fujifilm. Moreover, by making possible the use of Qamuy, a quantum chemical calculation software, in partnership with QunaSys, it will be possible to perform quantum chemical calculations at high speed.

In addition, we will launch an initiative to make the application available on the quantum computer under development at RIKEN RQC-Fujitsu Collaboration Center, which is carried out in collaboration with RIKEN.

Future plans

Regarding future plans, “We plan to release a large-scale quantum simulator to solve social problems using quantum technology, and by September 2022, we will develop a 40-qubit quantum simulator, and more. We hope many people will use it. We hope it will accelerate the development of applications that have never been seen before by taking advantage of its scale and high speed.” In 2023, RIKEN RQC – The real superconducting quantum computer under development at the Fujitsu Collaboration Center will be released. Thanks to this, it is possible to check the applications that have been developed in advance. Also, from 2024, superconducting quantum computers with more than 100 qubits will be released. We will release the real machine and implement error correction technology. We would like to expand the scope of quantitative application and solve social problems. ”

Mr. Vivek Mahajan, Executive Vice President and CTO of Fujitsu

Meanwhile, Fujitsu Executive Vice President and CTO Vivek Mahajan said, “Fujitsu is focused on five key technologies: computing, networking, AI, data and security and convergence technology.

The digitalization of businesses requires enormous computing power to process large amounts of data, and at Fujitsu, in addition to classical computing like HPCs, supercomputers and servers, quantum inspirations like digital annealers and quantum simulators . computers such as data technology and diamond rotation method. Fixed computing never goes away. It is Fujitsu’s strategy to provide a combination of various computer technologies.”

“Fujitsu’s quantum computing R&D strategy covers everything from quantum devices to basic software and applications, and focuses on software technology, while pursuing a wide range of hardware possibilities,” the Research Institute physics and chemistry.For the first time, there are three points to promote R&D globally with the world’s leading research institutes.From 2022, we will start quantum software research in R&D bases & D in India. Accelerating the speed of quantum research and technology. We would like to provide our customers with solutions that utilize the above.”

Fujitsu Technology Vision

Combination of computer technologies

Fujitsu Quantum Computing R&D Strategy

Fujitsu Research Center

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