UV/IR mixing refers to the phenomenon in quantum field theories where ultraviolet (UV) and infrared (IR) behaviors interact and influence each other, leading to non-trivial effects on the renormalization of parameters in the theory. This mixing becomes significant when considering noncommutative spacetime structures, which alter the typical behavior of fields and particles at different energy scales, complicating our understanding of physical interactions.
congrats on reading the definition of uv/ir mixing. now let's actually learn it.