TL;DR
This paper derives the flat space limit of the modified Cardy formula, connecting it to flat space cosmology microstate counting and extending it to include spin-3 charges, providing new insights into flat space holography.
Contribution
It introduces a flat space limit of the Cardy formula that accurately counts microstates of flat space cosmologies, including cases with higher-spin charges.
Findings
Reproduces the correct microstate counting for flat space cosmologies.
Extends the Cardy formula to include spin-3 charges.
Provides a prediction for Galilean conformal field theory microstates.
Abstract
In this note I derive the flat space limit of the modified Cardy formula associated with inner horizons and show that it reproduces the correct Galilean conformal field theory counting of flat space cosmology microstates. l also determine the entropy of flat space cosmologies in flat space chiral gravity in this way. In addition, I derive a Cardy-like expression for flat space cosmologies with spin-3 charges and thus give a prediction for the corresponding Galilean conformal field theory counting of flat space cosmology microstates with spin-3 charges.
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