We consider a massless scalar field in 1+1 dimensions satisfying a Robin boundary condition (BC) at a non-relativistic moving boundary. We derive a Bogoliubov transformation between input and output bosonic field operators, which allows us to calculate the spectral distribution of created particles. The cases of Dirichlet and Neumann BC may be obtained from our result as limiting cases. These t...

We derive a “generic” inhomogeneous “bridge” solution for a cosmological model in the presence of a real self-interacting scalar field. This solution connects a Kasnerlike regime to an inflationary stage of evolution and therefore provides a dynamical mechanism for the quasi-isotropization of the universe. In the framework of a standard Arnowitt-Deser-Misner Hamiltonian formulation of the dynam...

In this paper another class of Dark Matter candidate particles: the pseu-doscalar and scalar light bosonic candidates, is discussed. Particular care is devoted to the study of the processes for their detection (which only involves electrons and photons/X-rays) in a suitable underground experimental setup. For this purpose the needed calculations are developed and various related aspects and phe...

We further explore the idea that physics takes place in Clifford space which should be considered as a generalization of spacetime. Following the old observation that spinors can be represented as members of left ideals of Clifford algebra, we point out that the transformations which mix bosons and fermions could be represented by means of operators acting on Clifford algebra-valued (polyvector...

This work examines force modeling and software-based commutation for closed-loop control of planar linear motors, motivated by the need for a robust and versatile planar robot for precision assembly. The approach taken is to make measurements of the static and dynamic force capabilities of the motor as directly as possible, and determine the applicability of simple models commonly used. Measure...

I review the construction of an action for open superstring field theory which does not suffer from the contact term problems of other approaches. I also discuss a possible generalization of this action for closed superstring field theory. (Talk presented at 32 Ahrenshoop International Symposium on Elementary Particle Theory in Buckow, Germany) 1 Problems with Conventional Approach The construc...

Mixing transformations in quantum field theory are nontrivial, since they intimately related to the unitary inequivalence between Fock spaces for fields with definite mass and flavor. Considering superposition of two neutral scalar (spin-0) bosonic fields, we investigate some features emerging condensate structure flavor vacuum. In particular, quantify vacuum entanglement terms von Neumann entr...

Quantum field theory in an inflating universe is thought to be the playground of the physical processes that took place during the early Universe [1]. However little has yet been explicitly computed for self interacting fields [2]. Any light bosonic fields with non minimal coupling that exist during an inflationary phase is bound to produce, together with the inflaton field, superhorizon fluctu...

We construct a lattice action for N = 4 super Yang-Mills theory in four dimensions which is local, gauge invariant, free of spectrum doubling and possesses a single exact supersymmetry. Our construction starts from the observation that the fermions of the continuum theory can be mapped into the component fields of a single real anticommuting Kähler-Dirac field. The original supersymmetry algebr...

Path-integral expressions for one-particle propagators in scalar and fermionic field theories are derived, for arbitrary mass. This establishes a direct connection between field theory and specific classical point-particle models. The role of world-line reparametrization invariance of the classical action and the implementation of the corresponding BRST-symmetry in the quantum theory are discus...