＜＜＜「@」を「__AT__」に置き換えています＞＞＞

Date: Thu, 25 Apr 2024 20:13:24 +0900
To: 
Subject: [Sg-l:8403] 第25回極限宇宙コロキウム Robert Wald氏 5月13日(月)
From: ���� �� (Sg-l 経由) 

素粒子論グループの皆様

学術変革領域A「極限宇宙」では、第25回コロキウムを5月13日(月)の10:00から
開催予定です。講演者は、Robert Wald氏(Chicago)で、「The Entropy of 
Dynamical Black Holes 」というタイトルで講演をしていただきます。10:00か
ら11:00までがコロキウム講演、11:00から12:00までが講演者との質疑応答の時
間です。

ポスターは
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/wpsite/wp-content/uploads/2024/04/Poster2024May.pdf

をご覧ください。

ご関心を持たれる多くの皆様のご参加をお待ちしております。
前回までのコロキウムの際に既に登録されている方は、再度の登録は不要です。
今回新しく登録される方は、
https://docs.google.com/forms/d/1gApd5ioPZlklqygK1et77dyqm5hWytczJsSyBHnDCWA/viewform?ts=614330ea&edit_requested=true#responses

から登録を開催3日前までにお願いします。
登録された方にzoom情報を送付いたします。

アブストラクトは下記の英語のアナウンスをご覧ください。また過去の極限宇宙
コロキウムのスライドやビデオに関しては　https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/event-colloquium/
　を参照ください。


高柳　匡（京大基研）


================================================================

[The 25th Extreme Universe Colloquium]

[Date and place]
May 13th (Mon), Colloquium talk: 10:00-11:00 (JST).
Followed by Online coffee time during 11:00-12:00 (JST)

[Poster]
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/wpsite/wp-content/uploads/2024/04/Poster2024May.pdf


[Speaker]
Prof. Robert Wald (University of Chicago)

[Title]
The Entropy of Dynamical Black Holes

[Abstract]
We propose a new formula for the entropy of a dynamical black hole---
valid to leading order for 
perturbations off of a stationary black hole background---in an 
arbitrary classical diffeomorphism 
covariant Lagrangian theory of gravity in n dimensions. In stationary 
eras, this formula agrees with the usual Noether charge formula, but in 
nonstationary eras, we obtain a nontrivial correction term. 
In general relativity, our formula differs from the usual Bekenstein-
Hawking formula by a term involving the integral of the expansion of the 
null generators of the horizon and is equal to 1/4 of the area of the 
apparent horizon to leading order. Our formula for entropy in a general 
theory of gravity obeys a "local physical process version" of the first 
law of black hole thermodynamics. For first order perturbations sourced 
by external matter that satisfies the null energy condition, our entropy 
obeys the second law of black hole thermodynamics. For vacuum 
perturbations, the second law is obeyed at leading order if and only if 
the "modified canonical energy flux" is positive (as is the case in 
general relativity but presumably would not hold in general theories). 
We relate our entropy expression to a formula previously　proposed 
independently by Dong and by Wall and we investigate the validity of the 
generalized second law and its relationship to the quantum null energy 
condition (QNEC).

[Registration]
Please register from the following registration form by at least 3 days 
prior to the talk.
If you did this for any one of our previous events, it is not necessary 
to do it again.
https://docs.google.com/forms/d/1gApd5ioPZlklqygK1et77dyqm5hWytczJsSyBHnDCWA/viewform?ts=614330ea&edit_requested=true#responses


[Further Information]
For our events, please visit the webpage:
https://www2.yukawa.kyoto-u.ac.jp/%7Eextremeuniverse/events/

Funded by
FY2021-2025 MEXT -KAKENHI- Grant-in-Aid for Transformative Research 
Areas (A) The Natural Laws of Extreme Universe A New Paradigm for 
Spacetime and Matter from Quantum Information https://www2.yukawa.kyoto-u.ac.jp/%7Eextremeuniverse/en/

================================================================

Best,
Tadashi Takayanagi
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Date: Mon, 1 Jul 2024 11:00:18 +0900
To: sg-l__AT__ml.yukawa.kyoto-u.ac.jp
Subject: [Sg-l:8552] 第26回極限宇宙コロキウム, July 10th 16:30-, 26th ExU Colloquium
From: Naoki Yamatsu (Sg-l 経由) 

素粒子論グループの皆様

学術変革領域A「極限宇宙」では、第26回コロキウムを7月10日(水)の16:30か
ら開催予定です。講演者は柚木清司さん(理化学研究所)で、"Quantum
many-body dynamics in digital quantum computers"というタイトルで講演を
していただきます。16:30から17:30までがコロキウム講演、17:30から18:30ま
でがonline coffee break(講演者との質疑応答の時間)です。

ポスターは

https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/wpsite/wp-content/uploads/2024/06/Poster2024July.pdf

をご覧ください。

ご関心を持たれる多くの皆様のご参加をお待ちしております。
前回までのコロキウムの際に既に登録されている方は、再度の登録は不要です。
今回新しく登録される方は、

https://docs.google.com/forms/d/1gApd5ioPZlklqygK1et77dyqm5hWytczJsSyBHnDCWA/viewform?ts=614330ea&edit_requested=true#responses

から登録を開催3日前までにお願いします。
登録された方にzoom情報を送付いたします。

アブストラクトは下記の英語のアナウンスをご覧ください。また過去の極限宇宙
コロキウムのスライドやビデオに関しては

https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/event-colloquium/

を参照ください。

山津 直樹（京大基研）


================================================================

[The 26th Extreme Universe Colloquium]

[Date and place]
July 10th (Wed), Colloquium talk: 16:30-17:30 (JST).
Followed by Online coffee time during 17:30-18:30 (JST)

[Poster]
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/wpsite/wp-content/uploads/2024/06/Poster2024July.pdf

[Speaker]
Prof. Seiji Yunoki (RIKEN)

[Title]
Quantum many-body dynamics in digital quantum computers

[Abstract]
Owning to the recent rapid advancement of quantum technologies,
digital quantum computers with more than 100 qubits have emerged as a
new platform to explore quantum many-body dynamics that may
potentially be out of reach for classical computers. In this talk, I
will introduce some of the recent progress in this direction and
present our recent studies. In particular, I will discuss our recent
investigation of the dynamics of periodically driven systems using an 
IBM Quantum Heron processor, focusing on the emergence of discrete
time crystals (DTCs) and discrete time quasicrystals (DTQCs) in two
spatial dimensions [1]. Our study, based on a kicked Ising model with
133 qubits, reveals a prethermal regime characterized by magnetization
oscillations. We observe period-doubling DTCs and discover DTQCs
induced by the longitudinal field. Our findings, supported by
classical simulations based on state vector methods as well as tensor
network methods, shed light on out-of-equilibrium dynamics in quantum
systems and highlight the potential of digital quantum computers for
studying many-body systems. Additionally, I will present more results
on quantum dynamics using trapped-ion quantum computers provided by
Quantinuum [2].

[1] K. Shinjo, K. Seki, T. Shirakawa, R.-Y. Sun, and S. Yunoki,
“Unveiling clean two-dimensional discrete time quasicrystal on a
digital quantum computer”, arXiv:2403.16718.

[2] K. Seki, Y. Kikuchi, T. Hayata, and S. Yunoki, “Simulating
Floquet scrambling circuits on trapped-ion quantum computers”,
arXiv;2405.07613.

[Registration]
Please register from the following registration form by at least 3
days prior to the talk.
If you did this for any one of our previous events, it is not
necessary to do it again.

https://docs.google.com/forms/d/1gApd5ioPZlklqygK1et77dyqm5hWytczJsSyBHnDCWA/viewform?ts=614330ea&edit_requested=true#responses

[Further Information]
For our events, please visit the webpage:
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/en/events-en/

Funded by
FY2021-2025 MEXT -KAKENHI- Grant-in-Aid for Transformative Research
Areas (A) The Natural Laws of Extreme Universe
A New Paradigm for Spacetime and Matter from Quantum Information
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/en/
================================================================
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Date: Sun, 15 Sep 2024 11:19:31 +0900
To: sg-l__AT__ml.yukawa.kyoto-u.ac.jp
Subject: [Sg-l:8717] 第1回公開極限宇宙コロキウム, October 16th 13:00-, 1st Public ExU Colloquium
From: Naoki Yamatsu (Sg-l 経由) 

素粒子論グループの皆様

学術変革領域A「極限宇宙」では、第1回公開オンラインコロキウムを10月16日
(水)の13:00から開催予定です。講演者は寺師弘二さん(東京大学)で、
"Quantum Algorithm and Qubit Technology Applications for Particle
Physics"というタイトルで講演をしていただきます。13:00から14:00までがコ
ロキウム講演、14:00から15:00までがonline coffee break(講演者との質疑応
答の時間)です。

ポスターは

https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/wpsite/wp-content/uploads/2024/09/Poster2024Oct.pdf

をご覧ください。

ご関心を持たれる多くの皆様のご参加をお待ちしております。
前回までのコロキウムの際に既に登録されている方は、再度の登録は不要です。
今回新しく登録される方は、

https://docs.google.com/forms/d/1gApd5ioPZlklqygK1et77dyqm5hWytczJsSyBHnDCWA/viewform?ts=614330ea&edit_requested=true#responses

から登録を開催3日前までにお願いします。
登録された方にzoom情報を送付いたします。

アブストラクトは下記の英語のアナウンスをご覧ください。また過去の極限宇宙
コロキウムのスライドやビデオに関しては

https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/event-colloquium/

を参照ください。

山津 直樹（京大基研）


================================================================

[The 1st Public ExU Online Colloquium]

[Date and place]
October 16th (Wed), Colloquium talk: 13:00-14:00 (JST).
Followed by Online coffee time during 14:00-15:00 (JST)

[Poster]
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/wpsite/wp-content/uploads/2024/09/Poster2024Oct.pdf

[Speaker]
Prof. Koji Terashi (University of Tokyo)

[Title]
Quantum Algorithm and Qubit Technology Applications for Particle Physics

[Abstract]
Quantum computing may offer an intriguing path for paradigm changes in
computational science. Among potential quantum computing applications,
simulation of quantum many-body phenomena and learning of quantum
states/processes are often considered to be the place where we expect
to have quantum advantage over classical counterparts in terms of
computational resource. In this talk, I will present our recent
studies of quantum algorithms and the applications to particle physics
in the context of quantum simulation and quantum machine
learning. While the qubit technology is the foundation of quantum
computing, it will provide a means of probing the environment as a
quantum sensing device. I will highlight our recent activities of
utilizing superconducting qubits to search for dark matter in the
Universe, and the initial findings from an experimental run.

[Registration]
Please register from the following registration form by at least 3
days prior to the talk.
If you did this for any one of our previous events, it is not
necessary to do it again.

https://docs.google.com/forms/d/1gApd5ioPZlklqygK1et77dyqm5hWytczJsSyBHnDCWA/viewform?ts=614330ea&edit_requested=true#responses

[Further Information]
For our events, please visit the webpage:
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/en/events-en/

Funded by
FY2021-2025 MEXT -KAKENHI- Grant-in-Aid for Transformative Research
Areas (A) The Natural Laws of Extreme Universe
A New Paradigm for Spacetime and Matter from Quantum Information
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/en/
================================================================
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Date: Fri, 6 Dec 2024 09:55:01 +0900
To: sg-l__AT__ml.yukawa.kyoto-u.ac.jp
Subject: [Sg-l:8953] 第2回公開極限宇宙コロキウム, December 20th 17:00-, 2nd Public ExU Colloquium
From: Naoki Yamatsu (Sg-l 経由) 

素粒子論グループの皆様

学術変革領域A「極限宇宙」では、第2回公開オンラインコロキウムを12月20日
(金)の17:00から開催予定です。講演者は Roberto Emparan教授(University
of Barcelona)で、"Quantum Black Holes as Holograms"というタイトルで講
演をしていただきます。17:00から18:00までがコロキウム講演、18:00から
19:00までがonline coffee break(講演者との質疑応答の時間)です。

ポスターは

https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/wpsite/wp-content/uploads/2024/11/Poster2024Dec.pdf

をご覧ください。

ご関心を持たれる多くの皆様のご参加をお待ちしております。
前回までのコロキウムの際に既に登録されている方は、再度の登録は不要です。
今回新しく登録される方は、

https://docs.google.com/forms/d/1gApd5ioPZlklqygK1et77dyqm5hWytczJsSyBHnDCWA/viewform?ts=614330ea&edit_requested=true#responses

から登録を開催3日前までにお願いします。
登録された方にzoom情報を送付いたします。

アブストラクトは下記の英語のアナウンスをご覧ください。また過去の極限宇宙
コロキウムのスライドやビデオに関しては

https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/event-colloquium/

を参照ください。

また、極限宇宙の公募研究班の代表者によるオンラインセミナーを開催してい
ます。次回のセミナーは12月24日(火)の10:00から12:00に開催されます。本セ
ミナーに関しましてもご興味のある方は上記のコロキウム等の案内のメーリン
グリストに登録ください。コロキウムと同一のメーリングリストに情報をお送
りしますので既に登録されている方は、再度の登録は不要です。

山津 直樹（京大基研）


================================================================

[The 2nd Public ExU Online Colloquium]

[Date and place]
December 20th (Fri), Colloquium talk: 17:00-18:00 (JST).
Followed by Online coffee time during 18:00-19:00 (JST)

[Poster]
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/wpsite/wp-content/uploads/2024/11/Poster2024Dec.pdf

[Speaker]
Prof. Roberto Emparan (University of Barcelona)

[Title]
Quantum Black Holes as Holograms

[Abstract]
Quantum fields in the presence of a black hole give rise to remarkable
effects, the best known of which is Hawking radiation. A consistent
treatment of the backreaction effects of this radiation on the black
hole is a notoriously difficult problem, but it is necessary in order
to follow the process of the evaporation of the black hole. I will
describe how holographic methods map this problem into a more
tractable one, namely the classical dynamics of a black hole in a
negatively curved spacetime (AdS) with one more dimension, and I will
highlight the successes and limitations of this approach.

[Registration]
Please register from the following registration form by at least 3
days prior to the talk.
If you did this for any one of our previous events, it is not
necessary to do it again.

https://docs.google.com/forms/d/1gApd5ioPZlklqygK1et77dyqm5hWytczJsSyBHnDCWA/viewform?ts=614330ea&edit_requested=true#responses

[Further Information]
For our events, please visit the webpage:
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/en/events-en/

Funded by
FY2021-2025 MEXT -KAKENHI- Grant-in-Aid for Transformative Research
Areas (A) The Natural Laws of Extreme Universe
A New Paradigm for Spacetime and Matter from Quantum Information
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/en/

--------------------------------------------------------------------

[ExU interdisciplinary online seminar]

[Date and place]
December 24th (Tuse), Seminar talk: 10:00-12:00 (JST).

[Speaker]

Prof. Masaki Owari (Shizuoka University) 

[Title]

On algebraic analysis of Baker-Campbell-Hausdorff formula for Quantum
Control and Quantum Speed Limit

[Abstract]

The necessary time required to control a many-body quantum system is a
critically important issue for the future development of quantum
technologies. However, it is generally quite difficult to analyze
directly, since the time evolution operator acting on a quantum system
is in the form of time-ordered exponential. In this work, we examine
the Baker-Campbell-Hausdorff (BCH) formula in detail and show that a
distance between unitaries can be introduced, allowing us to obtain a
lower bound on the control time. We find that, as far as we can
compare, this lower bound on control time is tighter (better) than the
standard quantum speed limits. This is because this distance takes
into account the algebraic structure induced by Hamiltonians through
the BCH formula, reflecting the curved nature of operator
space. Consequently, we can avoid estimates based on shortcuts through
algebraically impossible paths, in contrast to geometric methods that
estimate the control time solely by looking at the target state or
unitary operator.

[Speaker]

Prof. Ryuji Takagi (University of Tokyo)

[Title]

Virtual quantum resource distillation

[Abstract]

Distillation, or purification, is central to the practical use of 
quantum resources in noisy settings often encountered in quantum 
communication and computation. Conventionally, distillation requires 
using some restricted 'free' operations to convert a noisy state into 
one that approximates a desired pure state. Here, we propose to relax 
this setting by only requiring the approximation of the measurement 
statistics of a target pure state, which allows for additional classical 
postprocessing of the measurement outcomes. We show that this extended 
scenario, which we call virtual resource distillation, provides 
considerable advantages over standard notions of distillation, allowing 
for the purification of noisy states from which no resources can be 
distilled conventionally. We show that general states can be virtually 
distilled with a cost (measurement overhead) that is inversely 
proportional to the amount of existing resource (e.g., entanglement, 
magic), and we develop methods to efficiently estimate such cost via 
convex and semidefinite programming, giving several computable bounds. 
We also extend our framework to the manipulation of quantum channels and 
combs, where we find that the virtual distillation rate applied to noisy 
quantum channels can surpass their quantum capacity.

This talk is based on the joint works with Xiao Yuan, Bartosz Regula, 
and Mile Gu Phys. Rev. Lett. 132, 050203 (2024), Phys. Rev. A 109, 
022403 (2024)


Funded by
FY2021-2025 MEXT -KAKENHI- Grant-in-Aid for Transformative Research
Areas (A) The Natural Laws of Extreme Universe
A New Paradigm for Spacetime and Matter from Quantum Information
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/en/
================================================================
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Date: Tue, 14 Jan 2025 11:22:22 +0900
To: sg-l__AT__ml.yukawa.kyoto-u.ac.jp
Subject: [Sg-l:9045] 第3回公開極限宇宙コロキウム, February 6th 17:00-, 3rd Public ExU Colloquium
From: Naoki Yamatsu (Sg-l 経由) 

素粒子論グループの皆様

学術変革領域A「極限宇宙」では、第3回公開オンラインコロキウムを2月6日
(木)の17:00から開催予定です。講演者は田崎晴明氏(学習院大学)と押川正毅
氏(東京大学)で、"Haldane conjecture, valence-bond picture, SPT phases,
and all that in quantum spin chains"と"Symmetry-Protected Topological
phases and Duality"というタイトルで講演をしていただきます。
17:00から19:00までがコロキウム講演、19:00から20:00までがonline chat
time(講演者との質疑応答の時間)です。

ポスターは

https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/wpsite/wp-content/uploads/2025/01/Poster2025February.pdf

をご覧ください。

ご関心を持たれる多くの皆様のご参加をお待ちしております。
前回までのコロキウムの際に既に登録されている方は、再度の登録は不要です。
今回新しく登録される方は、

https://docs.google.com/forms/d/1gApd5ioPZlklqygK1et77dyqm5hWytczJsSyBHnDCWA/viewform?ts=614330ea&edit_requested=true#responses

から登録を開催3日前までにお願いします。
登録された方にzoom情報を送付いたします。

アブストラクトは下記の英語のアナウンスをご覧ください。また過去の極限宇宙
コロキウムのスライドやビデオに関しては

https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/event-colloquium/

を参照ください。

山津 直樹（京大基研）


================================================================

[The 3rd Public ExU Online Colloquium]

[Date and place]
February 6th (Thu.), Colloquium talk: 17:00-19:00 (JST).
Followed by Online chat time during 19:00-20:00 (JST)

[Poster]
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/wpsite/wp-content/uploads/2025/01/Poster2025February.pdf

[Speaker]
Prof. Hal Tasaki (Gakushuin University)

[Title]
Haldane conjecture, valence-bond picture, SPT phases, and all that in
quantum spin chains

[Abstract]
In the first part of the colloquium, I will start by discussing
Haldane's famous conjecture on the low-energy properties of the
one-dimensional antiferromagnetic Heisenberg spin model and then
review subsequent development, which finally led to the modern notion
of symmetry-protected topological (SPT) phases and associated index
theorems.  In the second part, I will discuss my latest theorem, which
states that the antiferromagnetic Heisenberg chain with odd S belongs
to a nontrivial SPT phase if it has a unique gapped ground state.  As
far as I know, this is the only rigorous result on the topological
properties of the Heisenberg chain. The proof makes use of my
elementary index theorem based on the Lieb-Schultz-Mattis twist
operator.

[Speaker]
Prof. Masaki Oshikawa (University of Tokyo)

[Title]
Symmetry-Protected Topological phases and Duality

[Abstract]
Symmetry-Protected Topological (SPT) phases are, as the name suggests,
topological phases without any conventional local order parameter, but
distinct from the trivial phase only in the presence of a certain
symmetry. Although it was first conceived by Gu and Wen in 2009, its
prototypical example, the Haldane gap phase in odd-integer spin
chains, was discovered much earlier in the 1980s. As an important part
of early studies, Kennedy and Tasaki introduced a non-local
transformation which maps between the Haldane gap phase and a
conventional Spontaneous Symmetry Breaking (SSB) phase. The duality
picture could have naturally led to the concept of the SPT phases. 　In
this talk, I will review the concept of SPT phases from the duality
point of view, and its historical developments. I will also discuss
the recent resurgence of the duality approach inspired by modern field
theory formulation. It leads to a systematic construction of SPT
phases including a novel variety of “gapless SPT phases”.


[Registration]
Please register from the following registration form by at least 3
days prior to the talk.
If you did this for any one of our previous events, it is not
necessary to do it again.

https://docs.google.com/forms/d/1gApd5ioPZlklqygK1et77dyqm5hWytczJsSyBHnDCWA/viewform?ts=614330ea&edit_requested=true#responses

[Further Information]
For our events, please visit the webpage:
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/en/events-en/

Funded by
FY2021-2025 MEXT -KAKENHI- Grant-in-Aid for Transformative Research
Areas (A) The Natural Laws of Extreme Universe
A New Paradigm for Spacetime and Matter from Quantum Information
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/en/
================================================================
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Date: Mon, 17 Feb 2025 14:51:00 +0900
To: sg-l__AT__ml.yukawa.kyoto-u.ac.jp
Subject: [Sg-l:9123] 第4回公開極限宇宙コロキウム, March 8th 10:00-, 4th Public ExU Colloquium
From: Naoki Yamatsu (Sg-l 経由) 

素粒子論グループの皆様

学術変革領域A「極限宇宙」では、第4回公開オンラインコロキウムを3月8日
(土)の10:00から開催予定です。講演者はGeoffrey Penington氏(University
of California, Berkeley)で、"What's inside a black hole?"というタイト
ルで講演をしていただきます。10:00から11:00までがコロキウム講演、11:00
から12:00までがonline chat time(講演者との質疑応答の時間)です。

ポスターは

https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/wpsite/wp-content/uploads/2025/02/Poster2025March.pdf

をご覧ください。

ご関心を持たれる多くの皆様のご参加をお待ちしております。
前回までのコロキウムの際に既に登録されている方は、再度の登録は不要です。
今回新しく登録される方は、

https://docs.google.com/forms/d/1gApd5ioPZlklqygK1et77dyqm5hWytczJsSyBHnDCWA/viewform?ts=614330ea&edit_requested=true#responses

から登録を開催3日前までにお願いします。
登録された方にzoom情報を送付いたします。

アブストラクトは下記の英語のアナウンスをご覧ください。また過去の極限宇宙
コロキウムのスライドやビデオに関しては

https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/event-colloquium/

を参照ください。

山津 直樹（京大基研）


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[The 4th Public ExU Online Colloquium]

[Date and place]
March 8th (Sat), Colloquium talk: 10:00-11:00 (JST).
Followed by Online chat time during 11:00-12:00 (JST)

[Poster]
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/wpsite/wp-content/uploads/2025/02/Poster2025March.pdf

[Speaker]
Prof. Geoffrey Penington (University of California, Berkeley)

[Title]
What's inside a black hole?

[Abstract]
As Stephen Hawking famously showed, black holes are not actually
black. Instead, they are a very dark grey, with quantum mechanical
effects causing them to emit a faint glow called Hawking radiation.
But Hawking’s calculations also seemed to break one of the most
sacred principles of physics, the conservation of information. Only in
the last few years have we finally understand how information is saved
after all. The story involves quantum entanglement, event horizons and
spacetime wormholes. And it gets us closer than ever to understanding
the inside of a black hole.

[Registration]
Please register from the following registration form by at least 3
days prior to the talk.
If you did this for any one of our previous events, it is not
necessary to do it again.

https://docs.google.com/forms/d/1gApd5ioPZlklqygK1et77dyqm5hWytczJsSyBHnDCWA/viewform?ts=614330ea&edit_requested=true#responses

[Further Information]
For our events, please visit the webpage:
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/en/events-en/

Funded by
FY2021-2025 MEXT -KAKENHI- Grant-in-Aid for Transformative Research
Areas (A) The Natural Laws of Extreme Universe
A New Paradigm for Spacetime and Matter from Quantum Information
https://www2.yukawa.kyoto-u.ac.jp/~extremeuniverse/en/
================================================================