106 citations · 417 across the 24 of their papers we have counts for
24 papers
Closed-time-path approach to the optomechanical back-reaction problem
Salvatore Butera
We present a perturbative closed-time-path (in-in) formulation of an optomechanical system in which a quantum field interacts with a moving mirror via radiation pressure. We derive…
Quantum Gravity, Hydrodynamics and Emergent Cosmology: A Collection of Perspectives
Jibril Ben Achour, Dario Benedetti, Martin Bojowald +17
This collection of perspective pieces captures recent advancements and reflections from a dynamic research community dedicated to bridging quantum gravity, hydrodynamics, and emerg…
Corrections to the Optomechanical Hamiltonian from Quadratic Fluctuations of a Moving Mirror
Salvatore Butera
We extend the theory of the radiation pressure to include quadratic fluctuations in the position of a moving mirror. This enables the introduction of a generalized radiation pressu…
Analog Hawking radiation from a spin-sonic horizon in a two-component Bose-Einstein condensate
Anna Berti, Lennart Fernandes, Salvatore Giulio Butera +3
We theoretically study stimulated and spontaneous Hawking emission from an analog horizon for spin modes in a two-component Bose-Einstein condensate, both with and without a cohere…
Optomechanical Backreaction of Quantum Field Processes in Dynamical Casimir Effect
Yu-Cun Xie, Salvatore Butera, Bei-Lok Hu
Dynamical Casimir effect (DCE) and cosmological particle creation (CPC) share the same underlying physical mechanism, that of parametric amplification of vacuum fluctuations in the…
Noise and dissipation on a moving mirror induced by the dynamical Casimir emission
Salvatore Butera
We adopt an open quantum system approach to study the effects of the back-reaction from a quantum field onto the dynamics of a moving mirror. We describe the coupling between the m…
Field observables near a fluctuating boundary
Federico Armata, Salvatore Butera, Federico Montalbano +2
We review several aspects related to the confinement of a massless scalar field in a cavity with a movable conducting wall of finite mass, free to move around its equilibrium posit…
Numerical studies of back-reaction effects in an analog model of cosmological pre-heating
Salvatore Butera, Iacopo Carusotto
We theoretically propose an atomic Bose-Einstein condensate as an analog model of back-reaction effects during the pre-heating stage of early Universe. In particular, we address th…
Influence functional for two mirrors interacting via radiation pressure
Salvatore Butera
We study the effective dynamics of two mirrors, forming an optical cavity, and interacting with the cavity field via radiation pressure. We pursue a perturbative influence function…
Particle creation in the spin modes of a dynamically oscillating two-component Bose-Einstein condensate
Salvatore Butera, Iacopo Carusotto
We investigate the parametric amplification of the zero-point fluctuations in the spin modes of a two-component Bose-Einstein condensate, triggered by the dynamical evolution of th…
Position- and momentum-space two-body correlations in a weakly interacting trapped condensate
Salvatore Butera, David Clément, Iacopo Carusotto
We investigate the position- and momentum-space two--body correlations in a weakly interacting, harmonically trapped atomic Bose-Einstein condensed gas at low temperatures. The two…
Hanbury-Brown and Twiss bunching of phonons and of the quantum depletion in a strongly-interacting Bose gas
Hugo Cayla, Salvatore Butera, Cécile Carcy +6
We report the realisation of a Hanbury-Brown and Twiss (HBT)-like experiment with a gas of strongly interacting bosons at low temperatures. The regime of large interactions and low…
Quantum fluctuations of the friction force induced by the dynamical Casimir emission
Salvatore Butera, Iacopo Carusotto
We study a quantum model of dynamical Casimir effect in an optical cavity enclosed by a freely moving mirror attached to a harmonic spring. The quantum fluctuations of the friction…
Mechanical back-reaction effect of the dynamical Casimir emission
Salvatore Butera, Iacopo Carusotto
We consider an optical cavity enclosed by a freely moving mirror attached to a spring and we study the quantum friction effect exerted by the dynamical Casimir emission on the mech…
Nonequilibrium dressing in a cavity with a movable reflecting mirror
Federico Armata, M. S. Kim, Salvatore Butera +2
We consider a movable mirror coupled to a one-dimensional massless scalar field in a cavity. Both the field and the mirror's mechanical degrees of freedom are described quantum-mec…
Effect of boundaries on vacuum field fluctuations and radiation-mediated interactions between atoms
F. Armata, S. Butera, G. Fiscelli +6
In this paper we discuss and review several aspects of the effect of boundary conditions and structured environments on dispersion and resonance interactions involving atoms or mol…
Black-hole lasing in coherently coupled two-component atomic condensates
Salvatore Butera, Patrik Öhberg, Iacopo Carusotto
We theoretically study the black-hole lasing phenomenon in a flowing one-dimensional, coherently coupled two component atomic Bose-Einstein condensate whose constituent atoms inter…
Nonlinear synthetic gauge potentials and sonic horizons in Bose-Einstein condensates
Salvatore Butera, Niclas Westerberg, Daniele Faccio +1
Phonons in a Bose-Einstein condensate can be made to behave as if they propagate in curved spacetime by controlling the condensate flow speed. Seemingly disconnected to this, artif…
Vortex dynamics in superfluids governed by an interacting gauge theory
Salvatore Butera, Manuel Valiente, Patrik Öhberg
We study the dynamics of a vortex in a quasi two-dimensional Bose gas consisting of light matter coupled atoms forming two-component pseudo spins. The gas is subject to a density d…
A physically based connection between fractional calculus and fractal geometry
Salvatore Butera, Mario Di Paola
We show a relation between fractional calculus and fractals, based only on physical and geometrical considerations. The link has been found in the physical origins of the power-law…
Quantized vortices in interacting gauge theories
Salvatore Butera, Manuel Valiente, Patrik Öhberg
We consider a two-dimensional weakly interacting ultracold Bose gas whose constituents are two-level atoms. We study the effects of a synthetic density-dependent gauge field that a…
Vacuum Casimir energy densities and field divergences at boundaries
Nicola Bartolo, Salvatore Butera, Margherita Lattuca +3
We consider and review the emergence of singular energy densities and field fluctuations at sharp boundaries or point-like field sources in the vacuum. The presence of singular ene…
Fractional differential equations solved by using Mellin transform
Salvatore Butera, Mario Di Paola
In this paper, the solution of the multi-order differential equations, by using Mellin Transform, is proposed. It is shown that the problem related to the shift of the real part of…
Field Fluctuations in a One-Dimensional Cavity with a Mobile Wall
Salvatore Butera, Roberto Passante
We consider a scalar field in a one-dimensional cavity with a mobile wall. The wall is assumed bounded by a harmonic potential and its mechanical degrees of freedom are treated qua…