7 papers
Decoherence in quantum cosmology at the onset of inflation
A. Barvinsky, A. Kamenshchik, C. Kiefer +1
We calculate the reduced density matrix for the inflaton field in a model of chaotic inflation by tracing out degrees of freedom corresponding to various bosonic fields. We find a…
Spin-3/2 Potentials in Backgrounds with Boundary
Giampiero Esposito, Gabriele Gionti, Alexander Yu. Kamenshchik +2
This paper studies the two-spinor form of the Rarita-Schwinger potentials subject to local boundary conditions compatible with local supersymmetry. The massless Rarita-Schwinger fi…
Gravitons in One-Loop Quantum Cosmology: Correspondence Between Covariant and Non-Covariant Formalisms
Giampiero Esposito, Alexander Yu. Kamenshchik, Igor V. Mishakov +1
The discrepancy between the results of covariant and non-covariant one-loop calculations for higher-spin fields in quantum cosmology is analyzed. A detailed mode-by-mode study of p…
Euclidean Maxwell Theory in the Presence of Boundaries. II
Giampiero Esposito, Alexander Yu. Kamenshchik, Igor V. Mishakov +1
Zeta-function regularization is applied to complete a recent analysis of the quantized electromagnetic field in the presence of boundaries. The quantum theory is studied by setting…
One-Loop Amplitudes in Euclidean Quantum Gravity
G. Esposito, A. Yu. Kamenshchik, I. V. Mishakov +1
This paper studies the linearized gravitational field in the presence of boundaries. For this purpose, -function regularization is used to perform the mode-by-mode evaluation of…
Relativistic Gauge Conditions in Quantum Cosmology
G. Esposito, A. Yu. Kamenshchik, I. V. Mishakov +1
This paper studies the quantization of the electromagnetic field on a flat Euclidean background with boundaries. One-loop scaling factors are evaluated for the one-boundary and two…