Qulacs: a fast and versatile quantum circuit simulator for research purpose

To explore the possibilities of a near term intermediate-scale quantum algorithm and long-term fault-tolerant quantum computing, a fast and versatile quantum circuit simulator is needed. Here, we introduce Qulacs, a fast simulator for quantum circuits intended for research purpose. We show the main concepts of Qulacs, explain how to use its features via examples, describe numerical techniques to speed-up simulation, and demonstrate its performance with numerical benchmarks.

Automated summary

Qulacs is a fast simulator for quantum circuits designed for research purposes, aimed at exploring possibilities of near term intermediate-scale quantum algorithms and long-term fault-tolerant quantum computing. The main concepts, usage examples, numerical techniques for speeding up simulation, and performance benchmarks of Qulacs are presented to demonstrate its utility.