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Quantum decoherence of primordial perturbations through nonlinear scaler-tensor interaction
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Scaler and tensor perturbations couple nonlinearly with each other in the Einstein-Hilbert action. We show that such interaction naturally leads to the quantum decoherence of the primordial perturbations during inflation at horizon crossing. The dominant interaction Hamiltonian contributing to decoherence is identified and the master equation responsible for the decohering process is derived.
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Tensor Catalyzed Decoherence of Primordial Scalar Fluctuations
In single-field inflation, gravitational interactions mixing short-wavelength tensor and scalar modes decohere long-wavelength scalar perturbations at a rate proportional to (H/M_p)^2, with no suppression by the slow-...
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