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Quantum dissipative effects for a real scalar field coupled to a dynamical Neumann surface in d+1 dimensions
C. D. Fosco, B. C. Guntsche·October 2, 2025
hep-thQuantum Physics
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Abstract
We study dissipative effects for a system consisting of a massless real scalar field satisfying Neumann boundary conditions on a space and time-dependent surface, in d+1 dimensions. We focus on the comparison of the results for this system with the ones corresponding to Dirichlet conditions, and the same surface space-time geometry. We show that, in d=1, the effects are equal up to second order for rather arbitrary surfaces, and up to fourth order for wavelike surfaces. For d>1, we find general expressions for their difference.