AskDefine | Define swampland

Dictionary Definition

swampland n : low land that is seasonally flooded; has more woody plants than a marsh and better drainage than a bog [syn: swamp]

User Contributed Dictionary



  1. Low-lying land that is regularly flooded; especially such land that is drier than a bog or a marsh
  2. The set of all possible string theories

Extensive Definition

Recent developments in string theory suggest that the string theory landscape of vacua is vast. It is natural to ask if this landscape is as vast as allowed by consistent-looking effective field theories. Some authors (like Cumrun Vafa) suggest that this is not the case, and that the landscape is surrounded by an even more vast swampland of consistent-looking semiclassical effective field theories, which are actually inconsistent.
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