New Boundary Conditions for AdS3

Understand

New chiral boundary conditions are found for quantum gravity with matter on AdS3.

• The associated asymptotic symmetry group is generated by a single right-moving U(1) Kac-Moody-Virasoro algebra with c_R = 3l/2G.
• The Kac-Moody zero mode generates global left-moving translations and equals, for a BTZ black hole, the sum of the total mass and spin.
• The level is positive about the global vacuum and negative in the black hole sector, corresponding to ergosphere formation.