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Paper   IPM / Physic / 15882
School of Physics
  Title:   Flat space holography and complex SYK
1.  H.R. Afshar
2.  H. Gonzalez
3.  D. Grumiller
4.  D. Vassilevich
  Status:   Preprint
  Year:  2019
  Supported by:  IPM
We provide the first steps towards a flat space holographic correspondence in two bulk spacetime dimensions. The gravity side is described by a conformally transformed version of the matterless Callan-Giddings-Harvey-Strominger model. The field theory side follows from the complex Sachdev-Ye-Kitaev model in the limit of large specific heat and vanishing compressibility. We derive the boundary action analogous to the Schwarzian as the key link between gravity and field theory sides and show that it coincides with a geometric action discovered recently by one of us, see 1908.08089.

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