Newton-Cartan limit of Klein-Gordon AQFT: gravitational atoms and the loss of vacuum entanglement
The episode discusses a paper on the Newton-Cartan limit of Klein-Gordon AQFT, examining how modular structure collapses when moving from relativistic to Galilean quantum field theory. The hosts explain that while modular flow is lost, it is replaced by a Schrödinger Fock representation governed by a limiting Hamiltonian including gravitational potential.