東京科学大学 理学院 物理学系
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https://www.isct.ac.jp/ja/news/1nn0z5m5za9z

東京科学大学（Science Tokyo） 総合研究院 量子航法研究センターの上妻幹旺教授、松井宏樹特任助教、宮澤裕貴特任助教らの研究グループは、名古屋大学 大学院工学研究科 応用物理学専攻の川口由紀教授、東京大学 大学院理学系研究科 物理学専攻の上田正仁教授らと共同で、磁性量子気体中のアインシュタイン=ド・ハース効果^[用語1]の観測を報告しました。

本成果は、1月22日付（米国東部時間）の「Science」誌に掲載されました。

https://www.phys.sci.isct.ac.jp/wp/wp-content/uploads/2025/02/202503　nyuusi.pdf

対面での開催です。内容は物理学コースの全般的説明，入試の説明と研究室訪問です。事前登録は不要です。

This seminar will review experimental searches for the H-dibaryon through various reactions, focusing specifically on the latest results from the J-PARC E42 experiment. This experiment investigates the H-dibaryon near the Lambda Lambda and Xi- p mass thresholds. The E42 has collected thousands of Lambda Lambda production events from (K-, K+) reactions off a 12C target at 1.8 GeV/c. We are on the verge of publishing our results, and this talk will discuss the nature of the H-dibaryon, offering insights into exotic baryon spectroscopy and extending our understanding to further multiquark states.

連絡教員：物理学系　慈道　大介（内線2083）

https://www.phys.sci.isct.ac.jp/wp/wp-content/uploads/2026/01/434.pdf

Standard hydrodynamics serves as a successful macroscopic description of fluid motion, ranging from engineering applications to turbulent flows. However, this framework is inherently deterministic and neglects the fluctuations that inevitably arise due to their underlying atomic structure. In particular, these fluctuations govern fluid phenomena at the mesoscopic scale between the microscopic and macroscopic scales. Fluctuating hydrodynamics extends the classical description by incorporating thermal fluctuations, leading to a more accurate description of such mesoscopic transport phenomena.
Recently, we analyzed the strong non-equilibrium fluctuations exhibited by fluids subjected to uniform gradients, such as single-component fluids under a shear flow or a temperature gradient and multi-component fluids under a concentration gradient [1-3]. These phenomena are one of the most well-established examples requiring a fluctuating hydrodynamic description, having been precisely observed in microgravity experiments. We performed direct numerical simulations (DNS) of the fluctuating hydrodynamic equations, and investigated the properties of energy dissipation and fluid behavior in the inviscid limit. In this seminar, I will present these findings alongside a historical review of the development and analysis of fluctuating hydrodynamics.

[1] HN, and K. Yokota, Phys. Rev. E 111, L063401 (2025)
[2] HN, Y. Minami, and K. Saito, arXiv:2502.15241(2025)
[3] HN, and Y. Minami, arXiv:2511.17851 (2025)

連絡教員：物理学系　藤井　啓資（内線2136）

https://www.phys.sci.isct.ac.jp/wp/wp-content/uploads/2026/01/433ーhenkou.pdf

The interior of a neutron star is expected to be occupied by neutron superfluids. While the outer region should be filled by 1S0 superfluids consisting of a conventional singlet pairs of neutrons, the inner core may be 3P2 superfluids consisting of a condensate of spin-triplet p-wave Cooper pairs of neutrons with total angular momentum J=2 . This has rich topological structures in both momentum and real spaces: it is a topological superfluid and admits various topological defects such as half-quantum non-Abelian vortices, domain walls, surface topological defects, boojums, and so on. I will give a review of the current status of 3P2 superfluids with a particular attention to vortices and possible applications to pulsar glitches.

※Zoom情報：https://zoom.us/meeting/register/6aN7eizNRL–W58_kNle8A

連絡教員：物理学系　関澤　一之（内線2463）

https://www.phys.sci.isct.ac.jp/wp/wp-content/uploads/2025/12/432.pdf