＜＜＜「@」を「__AT__」に置き換えています＞＞＞

To: "sg-l__AT__yukawa.kyoto-u.ac.jp" , "statphys__AT__issp.u-tokyo.ac.jp" 
Date: Thu, 1 May 2025 08:18:12 +0000
Subject: [Sg-l:9349] RIKEN iTHEMS Seminar [Prof. Kazumasa A. Takeuchi, May 19 (Mon.), 2025, 15:00- JST]
From: 本郷 優 (Sg-l 経由) 

みなさま，

新潟大学・理研iTHEMSの本郷です．

非平衡系における普遍的なふるまい（特に，KPZ普遍クラスと可積分系におけるスピン輸送との関係）に関する最近の進展について，
東京大学の竹内さんを講師にお招きし，5月19日（月）に理化学研究所和光キャンパスにてハイブリッド形式でのレクチャーを開催いたします．

レクチャーに関する詳細はメール下部の案内またはホームページ
https://ithems.riken.jp/en/events/universality-class-for-driven-interfaces-and-integrable-spin-hydrodynamics
をご覧ください．

また，参加をご希望の方は，以下のフォームよりご登録をお願いいたします．
・対面参加の場合：5月10日(土)まで
・オンライン参加の場合：5月17日(土)まで
に以下のフォームから参加登録をお願いいたします．
https://forms.gle/sdezB15kzByvNweS8

対面でのご参加を歓迎します（参加登録は理研への入構に関する手続き上，お願いしております）．
また，興味のありそうな方へのご周知をよろしくお願いいたします．


日高 義将（京大基研・理研iTHEMS）
福嶋 健二（東大）
本郷 優（新潟大学・理研iTHEMS）
--------------------
- Date 15:00-17:00 May 19, 2025
- Place: Room 359, Kenkyu-Honkan, RIKEN, Wako
- Language: English
- Access to RIKEN Wako campus: https://ithems.riken.jp/en/access/riken-wako-campus

- Speaker: Kazumasa A. Takeuchi (Univ. Tokyo)
- Title: Universality class for driven interfaces and... integrable spin hydrodynamics?
- Abstract:
The Kardar-Parisi-Zhang (KPZ) universality class, originally formulated to describe driven systems such as growing interfaces, has undergone several paradigm shifts [1]. One major breakthrough was the discovery of exact solutions for one-dimensional models within the KPZ class — remarkable given their non-equilibrium and non-linear nature — enabled by underlying integrability. These exact results revealed nontrivial fluctuation properties, some closely linked to random matrix theory, which were subsequently observed in real experiments on driven interfaces. But more recently, the KPZ framework appears to be entering a new phase, extending unexpectedly to integrable spin chains at thermal equilibrium [2]. Although this connection was nearly dismissed when clear discrepancy in full counting statistics was reported, the speaker and collaborators numerically found that various two-point quantities agree precisely with KPZ exact solutions, so the KPZ class indeed governs integrable spin chains, yet only their two-point quantities [3]. I will also discuss a recent hydrodynamic theory aiming to bridge spin chains and KPZ, which, currently, falls short of fully explaining the numerical observations and calls for further refinement [2].

[1] For a review, see, e.g., K. A. Takeuchi, Physica A 504, 77 (2018).
[2] For reviews, see, e.g., V. B. Bulchandani et al., J. Stat. Mech. (2021), 084001; S. Gopalakrishnan and R. Vasseur, Annu. Rev. Condens. Matter Phys. 15, 159 (2024).
[3] K. A. Takeuchi, et al., Phys. Rev. Lett. 134, 097104 (2025).
--------------------