原子核・素粒子理論

当部門では広い意味での原子核の理論的研究と素粒子の理論的研究を行っています。前者では，主に原子核構造を理論的に研究すると共に，その成果を天体物理学等に応用します。原子核構造の研究では，量子力学的多体問題の手法を用いた無限に大きい仮想的な原子核の研究に重点を置きます。またそれと関連して，中性子星の内部構造の研究等を行います。後者では，素粒子物理学の理論的研究を行います。この主題と関連して，素粒子の標準理論とそれを超える物理の現象論的研究，重力や超対称性を含む素粒子統一模型の研究を取り入れます。また場の量子化法そのものの研究も含め，量子コヒーレンス・デコヒーレンスや量子ダイナミクス等，量子論の基礎にかかわる諸課題の研究も行います。

In this research area, theoretical studies on nuclei and elementary particles in a broad sense are conducted. In the former, the main course is the theoretical study of nuclear structure and its application to astrophysics. In the study of nuclear structure, emphasis is placed on the study of infinitely large hypothetical nuclei using quantum-mechanical many-body techniques. In relation to the above, structures of hot and cold neutron stars are also studied. In the latter, theoretical research on elementary particle physics is conducted. In relation to this course, phenomenological analyses of the standard model of elementary particles and models beyond the standard model, theoretical studies on unified models of elementary particles including gravity and supersymmetry are incorporated. Studies on fundamental issues of quantum theory related to such topics as quantum coherence/decoherence and quantum dynamics, as well as the field quantization method itself, are also conducted.