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From: Honda Masazumi
Date: Wed, 22 Jul 2020 18:57:59 +0900
To: sg-l__AT__yukawa.kyoto-u.ac.jp
Subject: [Sg-l:5103] オンラインセミナー: 7月30日 Han Yan氏

素粒子論グループの皆様、

依頼により転送します。

本多正純

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メーリングリストの皆様、

重複して受け取られた方はご容赦ください。

東大物工渡辺研究室の藤陽平です。当研究室では下記のZoomセミナーを企画しております。

聴講をご希望の方はZoomリンクをお送りいたしますので、以下から事前登録をお願いします。
https://sites.google.com/view/watanabegroup/japanese/seminars/han

皆様のご参加歓迎致します。どうぞよろしくお願いいたします。

藤陽平

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・講演者：Han Yan (OIST)
・日時：7/30 (木) 午後2時より
・タイトル：Universal picture of holographic toy models from rank-2 U(1) theory
(or Lifshitz gravity)
・アブストラクト：
In this talk, we address two points connecting holographic toy models and
fracton states of matter. First, we show that there is a unified picture
behind different holographic toy models based on tensor-networks, bit
threads, and fracton model: a web of bit threads on a hyperbolic lattice.
They all capture some coarse features of the entanglement structure from
AdS/CFT but also miss the "finer" ones. It is thus interesting to ask what
is the bulk theory that gives rise to such a picture. The second part of
the talk is to show that it arises from the rank-2 U(1) theory or Lifshitz
gravity. As a special case of gravity, it has the diffeomorphism as the
gauge structure but only at the linearized limit, which is crucial in
dictating the entanglement structure. We hope these discoveries help
understanding both gravity and fracton states of matter.
==============================================



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Masazumi Honda (本多正純),
Assistant Professor,
Yukawa Institute for Theoretical Physics, Kyoto University
mail: masazumi318__AT__gmail.com , masazumi.honda__AT__yukawa.kyoto-u.ac.jp