Journal club
13. Eye on ArXiv: 7 Apr 2008 – Gravity cutoff in theories with large descrete symmetries
It is a development of one year old extremely elegant Dvali’s idea that the possible maximal number of species is bounded by the gravitational physics.
12. Eye on ArXiv: 4 Apr 2008 – KS throat cloaking, non-gaussianity and Mathur’s fuzzballs
1. Alex Buchel, Lev Kofman “Black Universe epoch in string cosmology”
Alex and Lev write about multithroat scenario in string cosmology. As we remember, typically one needs more than a single throat in KKLMMT-type scenarios because the single throat setup does not solve the hierarchy problem (the energy scale of the throat is inflationary, while we naturally need a TeV scale of the Standard Model after the end of inflation). In two throat scenario history of the Universe looks as follows:
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