作者: Cumrun Vafa
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摘要: Recent developments in string theory suggest that landscape of vacua is vast. It natural to ask if this as vast allowed by consistent-looking effective field theories. We use universality ideas from not the case, and surrounded an even more swampland semiclassical theories, which are actually inconsistent. Identification boundary a central question at heart meaning properties consistent quantum gravitational propose certain finiteness criteria one relevant factor identifying (based on talks given Einstein Symposium Alexandria, 2005 Simons Workshop Mathematics Physics, talk have been presented Strings 2005).