Crossword clues for swampland
swampland
Wiktionary
n. 1 (context countable uncountable English) Low-lying land that is regularly flooded; especially such land that is drier than a bog or a marsh. 2 (context uncountable physics English) The set of all possible string theory.
WordNet
n. low land that is seasonally flooded; has more woody plants than a marsh and better drainage than a bog [syn: swamp]
Wikipedia
In physics, the term swampland is used in contrast to the term " landscape" to indicate physical theories or aspects of such theories which could be true if gravity were not an issue, but which are not compatible with string theory. Recent developments in string theory suggest that the string theory landscape of vacua is vast.
It is reasonable to consider whether this landscape is as colossal in size as the scale proposed by certain 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. Some proposed swampland criteria
are:
- If we have a charge symmetry, that symmetry has to be a gauge symmetry, not a global one, and in the spectrum of charged particles, there has to be at least a particle with a mass in Planck units less than the gauge coupling strength. But that doesn't mean all charged particles ought to be light.
- This applies to magnetic monopoles as well.
- The sign of some higher order terms in the effective action is constrained by the absence of superluminal propagation.
Usage examples of "swampland".
The bloodstone ring, loose on his finger, sailing away from his hand as he cast the spear, arcing over the embattled swampland.
I pictured the snowflaky, Grandma Moses villages, the reaches of swampland rattling with dried cattails, the ponds where frog and hornpout dreamed in a sheath of ice, and the shivering woods.
This was the mother of all forests, and her trees stretched east and west from Pebble Fleet to the Oboshi Desert, and south and north from the Trern Swamplands to the northern coast, though there was no woman here to speak those names.
Trern Swamplands they make boats from hollow tree trunks and they have many words to describe the kind of sound a log makes when hit.
Feeding the stream, a swift mountain cataract poured crystal waters from some mountain height into a rocky pool, from which it escaped by half a dozen channels before continuing in a swift race down to the forests and the swamplands far below.
I've left my run too late and I'm just about ready when I'm knocked arse over tit in the toilet as the Pan Am jet makes a steep spiralling descent over Tan Son Nhut airfield, so as to be less exposed to any enemy fire aimed at it from the nearby swamplands.
Grant followed in an ambulance, which kept to a corduroy road that had been set across a sea of red Virginia mud and swampland.
Sun Valley was the shits: three dirt roads gouged from swampland forty yards off the Interstate.
Bunny, he's planted crystals in swampland with malaria mosquito eggs all around them.
The mean temperature on the Mediterranea Plateau, a level area several thousand meters above the steaming, humid swamplands of Hivehom, was a comfortable 22° C.
But the causeway yet stood, outlasting the ages that had seen the ancient sea give way to tangled swampland.
Two or three times a year the agent came out from the provincial capital of Mazadone, riding a circuit through the swamplands, and his first stop in the Vale was always Aximaan Threysz's plantation.
The black-haired Lian sat beside her and soon was regaling the party with the tale of the hunt for stag in Drearwood: of the dash through a swampland.