👉 Heterotic is a concept in theoretical physics that refers to the presence of two different and independent types of particles, or "photon fields," in a system. These are known as "heterotic" because they differ from each other in their properties. In this context, "heterotic" is used to describe the possibility of having two different types of particles interacting with one another without any interference between them. The presence of these two separate fields can lead to phenomena that are not expected