Modularization of quantum circuits and mathematical and experimental study of quantum control

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K03795
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 13010:Mathematical physics and fundamental theory of condensed matter physics-related
• Research Institution: Kindai University
• Principal Investigator: Nakahara Mikio 近畿大学, 理工学総合研究所, 研究員 (90189019)
• Co-Investigator(Kenkyū-buntansha): NICCHORMAIC SILE 沖縄科学技術大学院大学, 量子技術のための光・物質相互作用ユニット, 教授 (10715288) ; BUSCH Thomas 沖縄科学技術大学院大学, 量子システム研究ユニット, 教授 (30715272)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: デコヒーレンス / 非マルコフ過程 / 非断熱量子制御 / ナノ光ファイバー / 光・物質相互作用 / 近接光

Outline of Final Research Achievements

Nakahara conducted research on the degradation of quantum information in controllable non-Markovian environments and demonstrated it using an NMR quantum computer. As a method to suppress decoherence, he studied non-adiabatic quantum control, which achieves adiabatic control in a short time, and edited a special issue of Philosophical Transactions of the Royal Society that comprehensively summarized non-adiabatic quantum control.
Busch and Nic Chormaic conducted research on the interaction of light and matter and proposed using optical nanofibers as cavities to couple multiple atoms. They studied the transfer of angular momentum from guided light associated with electric quadrupole transitions in the vicinity of a nanofiber to atoms.

Free Research Field

量子情報，量子計算

Academic Significance and Societal Importance of the Research Achievements

現在のNISQ(Near Term Intermediate Quantum)コンピュータを超える大規模量子コンピュータは，物流，創薬，物質設計，量子AIなど我々の生活に革命的な変革をもたらすと期待されている．その実現に対する障壁の一つにデコヒーレンスがある．本研究ではデコヒーレンスを解析し，それを克服する方法を提案した．分担者は，新たな複雑量子システムの探索とテストによって，量子技術の進化に貢献した．特に量子計測や量子シミュレーションの装置の改善に活用が期待される．