AdS2 holography and effective QFT

We discuss AdS(2 )quantum gravity from an unconventional perspective that emphasizes bulk geometry. In our approach, AdS(2 )has no boundary, there are no divergences that require renormalization, and the dilaton of JT-gravity can be omitted altogether. The result is the standard Schwarzian theory. However, it may be advantageous that our derivation just relies on conventional AdS/CFT correspondence and effective quantum field theory. For example, it clarifies the symmetry breaking pattern. It also puts the non-compact AdS(2) topology on the same footing as compact Riemann surfaces.

Automated summary

We discuss AdS(2) quantum gravity from an unconventional perspective which focuses on bulk geometry. Our approach avoids divergences and renormalization by omitting the dilaton of JT-gravity and considering AdS(2) without boundaries. This results in the standard Schwarzian theory. Our derivation relies on the conventional AdS/CFT correspondence and effective quantum field theory, providing advantages such as clarifying the symmetry breaking pattern and treating non-compact AdS(2) topology on equal footing with compact Riemann surfaces.