June 10, 2024
Mitsubishi Chemical Group Corporation
´ºÓêÖ±²¥app
IBM Japan, Ltd.
Mitsubishi Chemical Group (hereinafter "Mitsubishi Chemical"), ´ºÓêÖ±²¥app (location: Minato-ku, Tokyo; President: Kohei Ito; hereinafter "´ºÓêÖ±²¥app"), and IBM Japan, Ltd. (head office: Minato-ku, Tokyo; President and CEO: Akio Yamaguchi; hereinafter "IBM Japan") are pleased to announce that they have developed "a new calculation method using quantum computers to calculate the energy of large-scale molecules and solids with high precision" at the IBM Quantum Network Hub (located at the ´ºÓêÖ±²¥app Quantum Computing Center), and that their paper has been published in "npj Quantum Information," a specialized journal from the world-renowned publisher Nature Research.
To accurately determine the energy of large-scale molecules and solids, Mitsubishi Chemical, ´ºÓêÖ±²¥app, and IBM Japan developed "HTN+QMC," which combines the hybrid tensor network (HTN), a problem decomposition method, with the quantum Monte Carlo (QMC), a high-precision calculation method, and the "pseudo-Hadamard test," which efficiently calculates the overlap between quantum states on a quantum circuit. Using these methods, they calculated the energy of a photochromic model molecule on IBM's gate-based commercial quantum computer, "IBM Quantum System One," and successfully determined the ground state with a high precision of 0.042 ¡À 2.0 milli-Hartree, comparable to that of a noiseless simulator.
This research achievement is expected to pave the way for high-precision analysis of the physical properties of large-scale molecules and solids that exceed the size manageable by a single quantum computer.
Mitsubishi Chemical, ´ºÓêÖ±²¥app, and IBM Japan will continue to establish quantum computing technology for use in a wide range of materials development.
For the full press release, please see below.