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hep-th2026
Gravitational decoherence from soft-graviton -matrix
Hiroki Matsui
We revisit gravitational decoherence of matter superpositions using the leading soft sector of the graviton -matrix. Starting from Weinberg's soft theorem and the overlap of coh…
hep-th2026
Squeezed Gravitons and One-Loop Self-Energy under Light-Cone Smearing
Hiroki Matsui
We investigate light-cone smearing induced by quantum fluctuations of gravitons and its implications for the ultraviolet structure of quantum field theory. By treating the first-or…
hep-th2024★ 4 cited
Pauli-Villars regularization of Kaluza-Klein Casimir energy with Lorentz symmetry
Hiroki Matsui, Yutaka Sakamura
The Pauli-Villars regularization is appropriate to discuss the UV sensitivity of low-energy observables because it mimics how the contributions of new particles at high energies ca…