Recent News
- トポロジカル物質の物理と数理
- Our new member, Kazuki Sone, will tell us on edge states of non-linear systems
- Bulk-edge correspondence for energy dependent systems/nonlinear eigen value problems
- 日本物理学会 2024年春季大会
- SKCM² Spring Symposium: Nara, Japan
- APS March meeting 2024
- Bulk-edge correspondence (Encyclopedia of condensed matter physics, 2nd Ed.)
- 137は大きい…
- TTQM2023 Kashiwa
- 物性若手夏の学校（原稿追加）
- 日本物理学会第78回年次大会 9/16-9/19（2023年）東北大学、仙台
- Nontrivial Topology of Nontopological Nonlinear Waves
- Shiro Sakai will tell us on hyperuniformity !
- Heat carrying corner states of breathing Kagome
- Z2× Z2 symmetry and Z4 quantization in bosonic ladders
- Hidenori Fukaya will be telling us on dyon & topological insulators
- Negative index photonic crystal induces non hermitian physics
- Diophantine equation of SU(Q) topological pump
- 公募のお知らせ
- 初貝研（筑波大学大学院 物理学学位プログラム 量子物性理論）オープンキャンパス（説明会）
{"ticker_effect":"fade","autoplay":"true","speed":3000,"font_style":"italic"}
外部資金（2023）
科学研究費補助金 科研費データベース：初貝安弘 プロジェクト 基盤研究B : 強相関トポロジカルポンプの対称性とバルクエッジ対応 研究課題番号：23H01091 13,260千円 (直接経費: 10,200千円、間接経費: 3,060千円) 2023-04-01 – 2026-03-31 2023年度: 4,680千円 (直接経費: 3,600千円、間接経費: 1,080千円) Project l...
Read More
令和四年度 筑波大学大学院数理物質科学研究群 学位記授与式 式辞
本日、筑波大学から博士の学位を授与された皆さん、大変おめでとうございます。入学以来日々の研鑽を重ね、本日の学位授与にいたるまでの努力の結果、学位取得に至ったこと真に喜ばしく、教職員を代表しまして心よりお祝い申し上げます。 この３年間を振り返ると、この期間はコロナウイルス感染症が世界的に蔓延した期間に重なり、厳しく制限された活動のみしか行えない時期でした。学生の皆さんのみならず教員にとっても、今まで...
Read More
日本物理学会2023年春期大会 令和5年（2023年）3月22日（水）～25日（土）
25pA1-3 259 例外点における強相関効果 吉田恒也, 初貝安弘A 京大理, 筑波大数理A 領域1 22aD1-5 2023 2点修飾ハニカム格子における平方根高次トポロジカル絶縁体 松本大輝, 溝口知成, 初貝安弘 筑波大数理 領域4 24pPSD-5 649 固有値の非線形性とカイラルゼロモード 磯部拓磨, 吉田恒也A, 初貝安弘 筑波大数理, 京大理A 領域4 24pPSD-7 130...
Read More
APS March meeting 2023
APS March meeting, March 5–10, 2023 | Las Vegas, Nevada March 20–22, 2023 | Virtual
Read More
Graphene, silicene and martini
Chemisorption on graphene and silicene may realize Martini type π-electron network. It implies specific band dispersion. We propose potential materialization by using the molecular orbital constr...
Read More
Array of Martini glasses with topology
Taking a square root is not trivial. The Dirac equation is invented by the square root of the Kleind-Gordon equation. Then the lattice analog of the operation implies non-trivial topology and edge/cor...
Read More
Novel critical states in random U(1) MO models in 2D
Using a molecular orbital (MO) construction scheme of the flat band which we are proposing, we found novel random critical states in a series of flat band systems away from the flat band energy. The M...
Read More
Anyon superconductivity revisited : talk by Koji Kudo
Next Wednesday, Feb. 15 (2023), Koji Kudo (Penn state) visits us and will be telling on anyon superconductivity. The talk is hybrid. [Detail] For the zoom link, contact me (email). Speaker: Koji Kudo...
Read More
Topological strucure can be fragile against interactions
Topological protection of singularities for the non-Hermitian problem is one of the recent focuses in condensed matter physics. Exceptional points and rings with symmetry constraints are typical examp...
Read More
Seminar by Tomonari Mizoguchi
Coming Wed. afternoon, 13:00, Dec.14, Tomonari Mizoguchi (Univ. Tsukuba) will be telling us about his work in collaboration with N. Okuma (Kyoto Univ.). The seminar is in a hybrid format. Please conta...
Read More
Reduction of non-Hermitian 1D topology with interaction
Topological protection for topological systems may change by the inclusion of particle-particle interaction, which is known as "reduction phenomena." Here we have pointed out its possibilities for 1-d...
Read More
Bulk-edge correspondence in electric circuits of topological pump
One of the recent wisdom for topological phases is the use of a classical system as a quantum simulator. The Hofstadter butterfly associated with topological phase transitions is realized in electric ...
Read More
日本物理学会2022年秋
講演番号 登録番号 タイトル 著者 所属 領域 13pPSB-31 982 固有値の非線形性を持つ系のバルク境界対応 磯部拓磨, 吉田恒也, 初貝安弘 筑波大数理 領域4 15aH131-8 887 一般化された回転対称性のある系での例外点と判別式指標 若尾洋正, 吉田恒也, 初貝安弘 筑波大数理 領域4 15aH131-9 1257 一次元点ギャップトポロジーに対する強相関効果 吉田恒也, 初貝...
Read More
Adiabatic connection with spin
Adiabatic connection of the gapped many-body states is a conceptual background of the topological phases. Historical and more than successful examples are given by various fractional quantum Hall stat...
Read More
BEC seminar :工藤耕司氏 (Penn State) Aug.10, 2022
On Aug.10 (Wed) 2022 at 11:am Japan time, Koji Kudo at Penn State will be telling us about his recent study by a title : "Exactly solvable model for non-Abelian quasiparticle states." Join us on zoom....
Read More
“b 2– 4 ac” formula with rotation symmetry
The discriminant is a generalization of the "b 2- 4 ac" formula that everybody knows, which tells us the degeneracy of the (secular) equation. Then it is natural the discriminant is useful for the stu...
Read More
Random flatbands are special
Recent wisdom for the construction of flat bands is applicable even with randomness. Characterization of special features of the random flat bands has been successfully done by using machine learning....
Read More
APS March meeting 2022
APS March meeting, March 14-18 2022, Chicago USA
Read More
日本物理学会2022年春
講演番号 登録番号 タイトル 著者 所属 領域 15aE22-8 529 拡張ボースハバード模型におけるトポロジカルポンプとバルクエッジ対応 久野義人A, B, 初貝安弘A 筑波大数理A, 秋田大B 領域1 15aT24-10 2043 カゴメ格子上の熱伝導 牧野柊星, 福井隆裕, 吉田恒也A, 初貝安弘A 茨城大, 筑波大A 領域4 17pPSE-3 496 光メタマテリアルにおけ...
Read More