 Method of virtual quanta

The "method of virtual quanta" is a concept that appears primarily in the context of quantum field theory and theoretical physics. Although it is not a standard or widely-used term like "virtual particles" or "virtual states," it may refer to a method or approach used to describe phenomena involving virtual particles or states in quantum mechanics. In quantum field theory, a virtual particle is an internal line in a Feynman diagram that represents an intermediate state.