Zweibach, in A First Course in String Theory said: "We now discuss a coordinate system that will be extremely useful in our study of string theory, the light-cone coordinate system", then he mentioned that this coordinate system will be used to quantize strings.
My question: What'sMy question: What's so special about light-cone coordinates/gauge, so they have used them to quantize strings? whyWhy are they "extremely useful"?
