Large N Expansion

The Large N Expansion is a mathematical and theoretical framework often used in physics, particularly in quantum field theory and statistical mechanics. It involves studying systems characterized by a large number, N, of degrees of freedom, such as particles or fields. By considering the behavior of these systems as N approaches infinity, researchers can simplify complex calculations and gain insights into the underlying physics. This approach can reveal approximations and patterns that might not be visible in smaller systems, allowing physicists to understand phenomena like phase transitions and interactions more clearly.