ar X iv : h ep - t h / 04 04 22 6 v 1 2 8 A pr 2 00 4 On string backgrounds and ( logarithmic ) CFT 1
نویسنده
چکیده
We discuss the link between string backgrounds and the associated world-sheet CFTs. In the search for new backgrounds and CFTs, Penrose limits and Lie algebra contractions are important tools. The Nappi-Witten construction and the recently discovered logarithmic CFT by Bakas and Sfetsos, are considered as illustrations. We also speculate on possible extensions. Based on invited talk presented at the IX-th Workshop on Mathematical Physics and Applications, Rabat, 23-25 February 2004.
منابع مشابه
ar X iv : h ep - t h / 04 04 18 8 v 1 2 3 A pr 2 00 4 CERN - PH - TH / 2004 - 048 hep - th / 0404188 STRING THEORY
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تاریخ انتشار 2004