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.

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