Question

Why is it not easy to quantize gravity?

Answer 1

Gravity:

1. Gravity is difficult to quantify because the constants involved in gravitational interaction, such as Newton's constant and coupling constant, have dimensions that are inverse of mass squared.
2. When gravity is compared to Fermi's theory, which also incorporates dimensionless coupling constants, the dynamics become controllable.
3. As a result, adjusting the quantities involved in gravity will make the quantities more complex.

Therefore, quantifying gravity is difficult.