＜＜＜「@」を「__AT__」に置き換えています＞＞＞

To: Kenichi Yoshida (Sg-l 経由) 
Date: Thu, 14 Nov 2024 07:27:53 +0000
Subject: [Sg-l:8894] 初期宇宙オンラインセミナーのお知らせ【11月21日午後5時～】
From: Tomo Takahashi (Sg-l 経由) 


素粒子論グループの皆様，
（重複して受け取られた場合はご容赦ください）

#English follows Japanese

11月21日（木）に初期宇宙論オンラインセミナーを開催いたします。今回はドイツ・イェーナ大学のFlörchinger教授にボーズ・アインシュタイン凝縮を用いて実験室で初期宇宙をシミュレートする研究についてお話いただきます。

この研究分野は日本ではあまり聞き馴染みがありませんが、すでに膨張宇宙での粒子生成を模倣する系が構築され、そのゆらぎのパワースペクトルなども実験的に測られているそうです。専門外の方にも分かりやすくお話いただけるとのことですので、ご興味のある方は是非ご参加ください。事前登録は不要です。詳細は以下の通りです。

藤田智弘（お茶大）、難波亮（理研iTHEMS）、高橋智（佐賀大）


Early Universe Seminar Series

Date: November 21st (Thu), 5pm-6pm (JST)

Place: online
https://us02web.zoom.us/j/85661728851?pwd=wP13qcnIT0mACq7GamBqKGSm7V6PXr.1
Meeting ID: 856 6172 8851
Passcode: 122833

Speaker: Stefan Flörchinger（Friedrich Schiller University Jena）

Title: Quantum field simulator for dynamics in curved spacetime and cosmological particle production

Abstract: Quantum fields in curved spacetimes have many tantalizing theoretical properties, for example particles are being produced by the time-dependence of the geometry. I will describe how quantum fields in geometries with spacetime curvature and different cosmologies can be quantum-simulated with Bose-Einstein condensates in specifically designed trapping potentials and with time-dependent interaction strengths. Analytical results for relativistic scalar fields in cosmologies with 2+1 spacetime dimensions will be compared with recent experimental results obtained in Heidelberg laboratories.

===========================
Dear all,

We are pleased to announce an upcoming online seminar on November 21st (Thursday) featuring a talk by Prof. Stefan Flörchinger from Friedrich Schiller University Jena, Germany. Prof. Flörchinger will present his fascinating work on simulating early-universe conditions in the lab using Bose-Einstein condensates.

While this field is still relatively unfamiliar in Japan, Prof. Flörchinger has already achieved remarkable results, including constructing an experimental setup that mimics particle creation in an expanding universe and measuring the power spectrum of fluctuations. For those interested, please use the Zoom link above to join us directly on the day. No registration is required. We look forward to seeing you there!

Organizers: Tomohiro Fujita (Ochanomizu U.), Ryo Namba (RIKEN iTHEMS), Tomo Takahashi (Saga U.)