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