In
theoretical physics
Theoretical physics is a branch of physics that employs mathematical models and abstractions of physical objects and systems to rationalize, explain and predict natural phenomena. This is in contrast to experimental physics, which uses experi ...
, a double scaling limit is a
limit
Limit or Limits may refer to:
Arts and media
* ''Limit'' (manga), a manga by Keiko Suenobu
* ''Limit'' (film), a South Korean film
* Limit (music), a way to characterize harmony
* "Limit" (song), a 2016 single by Luna Sea
* "Limits", a 2019 ...
in which the
coupling constant
In physics, a coupling constant or gauge coupling parameter (or, more simply, a coupling), is a number that determines the strength of the force exerted in an interaction. Originally, the coupling constant related the force acting between two ...
is sent to zero while another quantity is sent to zero or infinity at the same moment.
The adjective "double" is a kind of misnomer because the procedure represents an ordinary scaling. However, the adjective is meant to emphasize that two parameters are simultaneously approaching singular values.
The double scaling limit is often applied to
matrix models,
string theory, and other theories to obtain their simplified versions.
Theoretical physics
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