KEK素粒子原子核研究所理論セミナー(佐藤 勇二 氏)

  • 分類 理論セミナー
  • 開始 2017/06/06(火)11:00
  • 終了 2017/06/06(火)12:00
  • 会場 研究本館1階会議室1
  • 講演タイトル A world-sheet approach to non-geometric backgrounds in string theory
  • 講演者 佐藤 勇二 氏 (筑波大学)
  • 言語 英語/English
  • 連絡先 tsuyama-AT-post.kek.jp
  • ウェブサイト
  • 食堂・売店 利用予定なし/0

概要

String dualities allow us the non-geometric string backgrounds whose transition functions involve duality transformations. We first discuss such non-geometric backgrounds obtained through T-duality, i.e. T-folds, from the world-sheet point of view. In particular, we construct their modular invariant partition functions systematically based on the momentum lattices. Second, as an application, we show that our non-geometrical setting, or its analogs, can simply realize non-supersymmetric backgrounds with vanishing cosmological constant at one loop, as well as non-supersymmetric D-branes with vanishing self-overlap, which give non-perturbatively small cosmological constant. If time is allowed, we would also like to comment on the world-sheet theories obtained from conformal interfaces.