Quantum/Classical hybrid simulations of multielectron dynamics in intense laser fields

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K18903
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 30:Applied physics and engineering and related fields
• Research Institution: The University of Tokyo
• Principal Investigator: Sato Takeshi 東京大学, 大学院工学系研究科(工学部), 准教授 (30507091)
• Project Period (FY): 2021-07-09 – 2023-03-31
• Keywords: 量子コンピューター / 量子ダイナミクス / 時間依存結合クラスター法

Outline of Final Research Achievements

In the light-matter interaction, the photon energy is first absorbed by electrons, which is then followed by various photoreactions through the energy transfer from electrons to nuclei. Attosecond science, which is based on the 2018 Nobel Prize-winning laser technology, is targeting the direct observation and control of such electron dynamics. Achieving this world-changing goal requires reliable calculation methods of intense laser-driven multielectron dynamics, which, however, suffers from the problem of combinatorial explosion peculiar to quantum many-body systems. In this work we developed a novel quantum computer/classical computer hybrid algorithm to simulate intense-laser driven multielectron dynamics called time-dependent unitary coupled-cluster method.

Free Research Field

量子物理

Academic Significance and Societal Importance of the Research Achievements

本研究では多体量子情報は量子コンピュータで、一体量子情報は古典コンピュータで扱う時間依存量子・古典ハイブリッド計算を実現した。これはNISQ量子コンピュータを現実的かつトリビアルでない問題に適用するための鍵となる。長期的展望として、本研究成果によってアト秒科学の最終目標である電子運動の直接観測・直接制御が達成されれば、例えば、円偏光高次高調波スペクトロスコピーによるキラル分子の識別等が期待でき、生命科学、化学産業、製薬産業にまで革新的なインパクトを与えると予想される。