＜＜＜「@」を「__AT__」に置き換えています＞＞＞

From: Yuya Tanizaki
Date: Thu, 22 Dec 2022 10:25:16 +0900
To: sg-l__AT__yukawa.kyoto-u.ac.jp
Subject: [Sg-l:7203] セミナー案内

素粒子論グループの皆様、

依頼により、セミナー案内を転送いたします。

谷崎

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【Subject】
セミナー(ハイブリッド): 1月5日 小林良平氏

【メール本文】
メーリングリストの皆様、

東大物工渡辺研究室の小野清志郎です。
当研究室では下記のセミナー(ハイブリッド形式)を企画しております。

対面・オンライン参加に関わらず、参加をご希望される方は以下のページから事前登録をお願いします。
https://sites.google.com/view/watanabegroup/japanese/seminars/kobayashi3

皆様のご参加をお待ちしております。

小野清志郎

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Speaker: Ryohei Kobayashi (University of Maryland)
Date & Time: 10am, Jan 5, 2023.
Room: Seminar Room A&D (Engineering Building #6 at UTokyo) / Online (Zoom)
Title: Higher-group symmetry of topological order and logical gates

Abstract:
Topologically ordered phases can host interesting classes of non-trivial
topological defects of varying codimensions. Among the topological defects,
the invertible defects form an algebraic structure called higher-group. In
this talk we explain how the higher-group structure of invertible global
symmetry emerges in discrete gauge theory of generic dimensions, and show
various examples of the higher-group symmetry in topological order mainly
focusing on (3+1)-dimensional stabilizer models. The emergent global
symmetry of a stabilizer model is understood as a logical gate acting on
the logical qubits. We explain that the higher-group structure of global
symmetry in general leads to non-Pauli logical gate realized by the action
of emergent global symmetry, e.g., Control-Z logical gate of
(3+1)-dimensional Z2 toric code.
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Yuya Tanizaki
Yukawa Institute for Theoretical Physics, Kyoto University
Kitashirakawa Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
email : yuya.tanizaki__AT__yukawa.kyoto-u.ac.jp
web: https://sites.google.com/view/yuyatanizaki
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