Holographic Duality Between 2D Crosscap CFT and AdS3 Spacetime with dS2 Branes

This paper proposes a novel holographic duality between 2D conformal field theories (CFTs) defined on non-orientable manifolds (crosscap CFTs) and AdS3 spacetime with dS2 end-of-the-world branes, offering a new perspective on dS gravity and a potential approach to dS holography.