プレスリリース, Press release

2024年7月8日 | 新着情報

Dr Miyagi and Collaborators have made a press release from the Technical University of Darmstadt, Germany, on solving the problem on the nuclear magnetic moment. Details can be found in this page.

宮城さんと共同研究者等が、原子核の磁気モーメントの計算に成功し、ドイツ・ダルムシュタット工科大学からプレスリリースを行いました。詳細はこちら。

Seminar (セミナー)2024.6.28 Michal Repisky & Lukas Konecny (The Arctic University of Norway)

2024年6月24日 | 新着情報

The following two seminars will be held on June 28, 2024, at Meeting Room A in Center for Computational Sciences, University of Tsukuba, starting from 15:15 pm.

  • Speaker: Michal Repisky
    Affiliation: Comenius University in Bratislava, Slovakia & UiT The Arctic University of Norway, Tromsø, Norway
    Title: Relativistic Hamiltonians and DFT
    Abstract: Despite the success of non-relativistic quantum mechanics in describing molecular and material properties, there are many phenomena for whose correct description the special theory of relativity has to be considered. These phenomena are dubbed relativistic effects and are prominent when the systems of interest involve heavy elements or spin. In my presentation I will show how the Dirac equation is solved in quantum chemistry while introducing the four-component Dirac-Coulomb Hamiltonian and relativistic DFT methodology. Moreover, I will present modern two-component X2C Hamiltonian based on algebraic decoupling of the original Dirac Hamiltonian and show that it allows to reproduce reference four-component results at a fraction of their cost allowing us to abandon the still widespread notion of the infeasibility of fully relativistic approaches.
  • Speaker: Lukas Konecny
    Affiliation: UiT The Arctic University of Norway, Tromsø, Norway & Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany
    Title: Relativistic spectroscopy in frequency and time domains
    Abstract: I will present the extension of relativistic electronic structure methods into the realm of dynamical molecular properties in the form of relativistic time-dependent density functional theory (TDDFT). I will present two approaches to relativistic TDDFT as implemented in our computer program ReSpect. First is the conventional linear response TDDFT and its applications for electron absorption and circular dichroism spectroscopies with focus on the core region where both scalar and spin-orbit relativistic effects are especially pronounced. Next is the real-time solution of the Dirac-Kohn-Sham equation that offers access to non-linear optical properties as well as modern attosecond spectroscopies.

新メンバー：YUさん New member: Yu

2024年6月17日 | 新着情報

A new postdoc researcher, Dr. Yu has joined our group.
ポスドク研究員のYuさんが研究室のメンバーに加わりました。

ハイライト論文に選定 A paper selected as Editors’ Suggestion

2024年5月2日 | 新着情報

A paper by N. Hinohara and collaborators has been published in Physical Review C of American Physical Society, and selected as an Editors’ Suggestion. The paper proposes a new computational method for the quasiparticle-phonon coupling.

有限振幅法の新たな拡張による準粒子・振動結合の計算手法を提案した論文（著者：日野原・その他）が、アメリカ物理学会のPhysical Review Cに出版され、Editors’ Suggestionに選ばれました。

佐藤さん准教授に昇任　Dr Sato promoted to Associate Professor

2024年5月1日 | 新着情報

助教だった佐藤駿丞さんが准教授になりました。おめでとうございます。

Assistant Professor Shunsuke A. Sato has been promoted to Associate Professor. Congratulations!

新メンバー：宮城さん、YUさん、庄司さん、萩原さん、赤井さん、千葉さん New members: Yu, Shoji, Hagihara, Akai, and Chiba

2024年4月5日 | 新着情報

A new assistant professor, Dr Miyagi, postdoc researcher, Dr Yu, and two graduate students in the Master course, Shoji and Hagihara, have joined our group. In addition, two undergraduate fourth-year students, Akai and Chiba, will perform the graduation research in our group.
助教の宮城さん、ポスドク研究員のYuさん、大学院生（M1）の庄司さん、萩原さん、４年生・卒研生の赤井さん、千葉さんが研究室のメンバーに加わりました。

Ruike-san got Gamma24 Jury Prize 類家さん国際研究会Gamma24ポスター発表審査員賞受賞

2024年3月28日 | 新着情報

Ms. Ruike has received the Jury Prize for the poster presentation at the workshop on frontier nuclear studies with gamma-ray spectrometer arrays (gamma24).

類家さんが国際研究会gamma24にてポスター発表の審査員賞を受賞しました。

Seminar (セミナー)2024.1.9 Moemi Matsumoto (Tohoku University)

2024年1月5日 | 新着情報

The following seminar will be given by Ms. Moemi Matsumoto in Tohoku University on Tuesday, January 9th, 2024.

Lecturer: Moemi Matsumoto (Tohoku University)
Place: Meeting Room A, Center for Computational Sciences
Date/Time:: January 9, Tuesday, 13:45 pm –
Title:: Generator coordinate method with basis optimization
Abstract:: The generator coordinate method (GCM) has been a well-known method to describe nuclear collective motions. In GCM, one a priori specifies collective degrees of freedom (collective coordinates), such as nuclear deformations, and superposes many Slater determinants (SDs) within the selected collective subspace. However, there always exists arbitrariness in this approach in the choice of collective coordinates, for which one has to rely on empirical and phenomenological theory. With such a choice, it is not trivial whether the collective motion of interest can be optimally described. Therefore, a description of the collective motion without pre-set collective coordinates is desirable in order not to miss important degrees of freedom.
Recently, we extended GCM by optimizing both the basis SDs and the weight functions according to the variational principle [1]. With such simultaneous optimization of the basis states, one does not have to specify beforehand the relevant collective degrees of freedom covered by the set of basis SDs. In this seminar, I will present results of this new approach for sd-shell nuclei. Using the Skyrme functional, I will show that the optimized bases correspond to excited states along a collective path, unlike the conventional GCM which superposes only the local ground states. I will also discuss the interaction dependence of the numerical results.
[1] M. Matsumoto, Y. Tanimura and K. Hagino, Phys. Rev. C 108, L051302 (2023).
Language: English

Seminar (セミナー)2024.1.30 Cenxi Yuan (Sun Yat-sen University)

2023年12月25日 | 新着情報

The following seminar by Dr Cenxi Yuan (Sun Yat-sen University, China) will take place as follows:

Lecturer: Cenxi Yuan (Sun Yat-sen University in China)
Place: Meeting Room A, Center for Computational Sciences
Date/Time: January 30, 2024, Tuesday, 13:45 pm –
Title: Configuration-Interaction Shell Model (CISM) Understanding of Exotic Nuclei
Abstract: A solid grasp of nuclear forces and models is indispensable to understanding the quantum many-body systems, such as atomic nuclei. There is a wealth of data about exotic nuclei far from the stability line, encompassing information regarding energy levels, electromagnetic characteristics, and α and β decays. Describing these properties within a unified model and under a unified nuclear force is valuable.
In this presentation, I will introduce the Configuration-Interaction Shell Model (CISM) and its applications in exotic nuclei, from light to heavy ones. New nuclides, such as 214U, 207Th, and 18Mg, and their implications for nuclear structure will be discussed. Additionally, I will delve into the analysis of isomeric states within Ag and In isotopes and N = 127 isotones, utilizing nuclear interactions and focusing on Type I and II shell evolution. The talk will also introduce cross-shell excitations and isospin symmetry in light nuclei, highlighting the strongest isospin mixing observed in β decays. Lastly, preliminary findings will be presented regarding the uncertainty associated with CISM when employing a unified nuclear force with varying strengths in proton-proton and neutron-neutron interactions.
Language :English

Postdoc opening (2) ポスドク研究員公募(2)

2023年12月20日 | 新着情報

筑波大学計算科学研究センター研究員公募

  • 公募人員： 研究員 １名
  • 所属組織：計算科学研究センター（原子核物理研究部門）
  • 専門分野：科研費・基盤研究(B)「非一様中性子星物質の物性とパルサー・グリッチ起源の解明」（研究代表者：中務孝、研究分担者：飯田圭、関澤一之）に参画し、非一様核物質の研究を実施する。核物質・原子核構造等の量子多体系に関わる数値的研究の経験があることがあることが望ましい。
  • 着任時期： 2024年4月1日以降のできるだけ早い時期（応相談）
  • 任期：2年、年度更新（2026年3月末まで）。
  • 給与・勤務条件： 年俸制（給与等雇用条件は本学の規定による）。候補者の職務経験等を加味し、本学規程に基づいて号俸を決定。常勤、裁量労働制適用。社会保険、及び通勤手当あり。
  • 応募資格： 博士の学位を有する方もしくは着任時期までに取得見込の方
  • 提出書類：
    1. 履歴書（含連絡先）
    2. 全業績リスト（主要論文3編に印）
    3. 研究の概要及び着任後の研究計画
    4. 本人についての意見を求め得る方2名の氏名及び連絡先、もしくは推薦書2通
    5. 着任可能時期
    6. ＥＵ―般データ保護規則（GDPR）に基づく個人データの取扱い及び域外移転に関する同意書（欧州経済領域の構成国及び英国在住者のみ必ず提出、本学所定様式
       https://www.ccs.tsukuba.ac.jp/reqdocuments/ ）
  • 選考方法： 提出書類に基づいた書面選考。必要に応じて（オンライン）面接。
  • 応募期間：2024年1月21日（日）締切
  • 応募方法：提出書類を一つのPDFファイルにまとめて電子メールの添付ファイルとして、nakatsukasa [at] nucl.ph.tsukuba.ac.jp（[at]を@に置き換える）に送付。（推薦書は、作成者が直接電子メールで送付しても良い。ただし件名を「***氏推薦書」、「Letter for ***」などとする。）
  • 問合せ先：筑波大学計算科学研究センター 中務　孝
    Email: nakatsukasa [at] nucl.ph.tsukuba.ac.jp（[at]を@に置き換える
  • その他：
    1. 応募書類に含まれる個人情報は、本人事選考のみに使用し、他の目的には一切使用しません。選考終了後はすべての個人情報を適切に破棄します。
    2. 計算科学研究センターは、文部科学省共同利用・共同研究拠点に認定されており、計算機共同利用を含む学際計算科学を推進しています。筑波大学では男女雇用機会均等法を遵守した人事選考を行っています。
    3. 本学では、「外国為替及び外国貿易法」に基づき、「国立大学法人筑波大学安全保障輸出管理規則」を定め、外国人、外国の大学・企業・政府機関等出身者又は特定類型該当者の雇用に際し厳格な審査を実施しています。

Postdoctoral Researcher in Center for Computational Sciences, University of Tsukuba

  • Position: Postdoctoral Researcher
  • Affiliation: Nuclear Physics Research Division, Center for Computational Sciences, University of Tsukuba
  • Research field and mission: The position is supported by KAKENHI (Grant-in-Aid) for Scientific Research (B) “Properties of inhomogeneous neutron-star matter and origin of pulsar glitches” (PI: T. Nakatsukasa), expecting the successful candidate to join the project to perform theoretical and numerical researches associated with the inhomogeneous nuclear matter.
  • Start of the term: At the earliest opportunity after April 1, 2024.
  • Employment Duration: The contract is for a single year and can be renewed until the end of March 2026.
  • Salary: Based on the University’s payment standards and determined by applicant’s ability and background.
  • Working hours: Full-time, Discretionary Labor System with social insurances and commuting allowance
  • Qualifications: Applicants having a Ph.D. degree or those expected to obtain a Ph.D. degree by the expected date of appointment.
  • Required documents:
    1) CV including contact information
    2) List of research achievements (Mark three major publications)
    3) Research history and research plans
    4) Names, affiliations, and contact information for two persons who can give their opinions on the applicant (or two letters of recommendation)
    5) Possible date of appointment
    6) Consent to Processing and Extraterritorial Transfer of Personal Data under GDPR (only required for persons located in the countries that make up the European Economic Area or in the United Kingdom of Great Britain and Northern Ireland. The template form can be downloaded from https://www.ccs.tsukuba.ac.jp/reqdocuments/ )
  • Deadline for application: January 21, 2024 (in JST)
  • Submission of the documents:
    Send all the documents 1)-6) by email as a single attached PDF file, to nakatsukasa [at] nucl.ph.tsukuba.ac.jp. (Recommendation letters can be directly emailed from the recommender, with the subject as “Letter for ****”.)
  • Contact: Takashi Nakatsukasa
    Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
    Email: nakatsukasa [at] nucl.ph.tsukuba.ac.jp ([at] should be replaced by @)
  • Miscellaneous
    1. After screening of documents, an online interview will be conducted if needed.
    2. Our center has been certified as a Joint Usage / Research Center by the Ministry of Education, Culture, Sports, and Technology, and promotes interdisciplinary computational sciences. The University of Tsukuba conducts personnel selection in compliance with the Equal Employment Opportunity Act.
    3. Based on the “Foreign Exchange and Foreign Trade Act,” our university has established the “Security Export Control Regulations,”. We conduct strict examinations, when we employs foreigners, people from foreign universities, companies, government agencies, etc.