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One of the successful routes to Minkowskian holography is the formulation of the duality in terms of BMS-invariant field theories that live on the null boundary of spacetime. In 2d BMS field theories, one can define a notion of modular invariance that leads to a BMS-Cardy formula. This formula reproduces the Bekenstein Hawking entropy of cosmological horizons in 3d flat space. We revisit this construction before building on it to find asymptotic BMS structure constants from the modular covariance of torus one-point functions. We also formulate a bulk calculation that reproduces our field theory answers.
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https://zoom.com.cn/j/96357968034?pwd=K2REeGF0V2dqOElRd09hVGVRcDk4Zz09
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Meeting ID: 963 5796 8034
Password: 125125
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Password：0115
