10 papers
Lamb Shift of a Static Atom Facing a Rotating Surface
César D. Fosco, Fernando C. Lombardo, Francisco D. Mazzitelli
We study how the Lamb shift of a static atom is modified when a nearby planar body rotates rigidly about its normal while the atom is held at a fixed distance . We derive a gene…
Covariant extrinsic curvature expansion of the nonlocal effective action for a massless scalar field on a manifold with boundary
A. Boasso, C. D. Fosco, B. C. Guntsche +1
We study the nonlocal effective action of a massless scalar field defined on a flat manifold with a curved boundary. Using a heat-kernel approach, we derive a covariant expansion o…
Conformally-flat gravitational analogues to the Schwinger effect
S. A. Franchino-Viñas, S. A. Franchino-Viñas, F. D. Mazzitelli +1
We study particle creation for scalar fields in conformally flat spacetimes using resummed heat-kernel techniques. We make use of an analogy between quantum scalar fields in confor…
Shortcuts to adiabaticity, unexciting backgrounds, and reflectionless potentials
Fernando C. Lombardo, Francisco D. Mazzitelli
We analyze shortcuts to adiabaticity (STA) and their completions for the quantum harmonic oscillator (QHO) with time-dependent frequency, as well as for quantum field theory (QFT)…
Nonlocal stress-energy tensor in time-dependent gravitational backgrounds
A. Boasso, F. D. Mazzitelli
We analyze the renormalized stress-energy tensor (RSET) of a massless quantum scalar field in time-dependent gravitational backgrounds. Starting from its formal expression obtained…
Vacuum polarization in the horizonless Bardeen metric
Andrés Boasso, Francisco D. Mazzitelli
We compute the renormalized stress-energy tensor for a massless quantum scalar field in the background of the horizonless Bardeen spacetime. Within the weak-field approximation, we…