Results 21 to 30 of about 228,440 (334)

Koopman-von Neumann Formulation of Classical Yang-Mills Theories: I [PDF]

open access: yes, 2005
In this paper we present the Koopman-von Neumann (KvN) formulation of classical non-Abelian gauge field theories. In particular we shall explore the functional (or classical path integral) counterpart of the KvN method.
Abad   +41 more
core   +2 more sources

Meson–baryon scattering in resummed baryon chiral perturbation theory using time-ordered perturbation theory

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
Integral equations for meson–baryon scattering amplitudes are obtained by utilizing time-ordered perturbation theory for a manifestly Lorentz-invariant formulation of baryon chiral perturbation theory.
X.-L. Ren   +3 more
doaj   +1 more source

Lorentz and CPT Violating Chern-Simons Term in the Formulation of Functional Integral [PDF]

open access: yes, 1999
We show that in the functional integral formalism the (finite) coefficient of the induced, Lorentz- and CPT-violating Chern-Simons term, arising from the Lorentz- and CPT-violating fermion sector, is undetermined.Comment: 5 pages, no figure ...
D. Colladay   +3 more
core   +2 more sources

Threading Dislocations Piercing the Free Surface of an Anisotropic Hexagonal Crystal: Review of Theoretical Approaches

open access: yesAdvances in Condensed Matter Physics, 2018
Inclined threading dislocations (TDs) piercing the oriented free surface of a crystal are currently observed after growth of oriented thin films on substrates.
Salem Neily, Sami Dhouibi, Roland Bonnet
doaj   +1 more source

Quantum nondemolition measurements in a Paul trap [PDF]

open access: yes, 2000
In this work a family of quantum nondemolition variables for the case of a particle caught in a Paul trap is obtained. Afterwards, in the context of the so called restricted path integral formalism, a continuous measuring process for this family of ...
Camacho, Abel
core   +3 more sources

N-photon amplitudes in a plane-wave background

open access: yesPhysics Letters B, 2021
We use the worldline formalism to derive master formulas for the one-loop N-photon amplitudes in a plane-wave background, for both scalar and spinor quantum electrodynamics.
James P. Edwards, Christian Schubert
doaj   +1 more source

Integrating semi-formal and formal requirements

open access: yes, 1997
In this paper, we report on the integration of informal, semiformal and formal requirements specification techniques. We present a framework for requirements specification called TRADE, within which several well-known semiformal specification techniques are placed.
Wieringa, Roelf J.   +2 more
openaire   +1 more source

On the reliability of residual stress measurements in unidirectional carbon fibre reinforced epoxy composites

open access: yesPolymer Testing, 2021
The present work introduces a novel methodology to analyse non-uniform residual stresses in composite materials. For robust determination of stresses in complex structures made of different layers, it is first necessary to prove that residual stress ...
A. Magnier   +5 more
doaj   +1 more source

Projective Metrizability and Formal Integrability [PDF]

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2011
The projective metrizability problem can be formulated as follows: under what conditions the geodesics of a given spray coincide with the geodesics of some Finsler space, as oriented curves. In Theorem 3.8 we reformulate the projective metrizability problem for a spray in terms of a first-order partial differential operator $P_1$ and a set of algebraic
Bucataru, I., Muzsnay, Z.
openaire   +4 more sources

Line Defects in Two-Dimensional Dodecagonal Quasicrystals

open access: yesMathematics
In this work, line defects in two-dimensional dodecagonal quasicrystals are investigated. Using the ten-dimensional framework of the integral formalism of two-dimensional quasicrystals, the closed-form solutions for the displacement fields and stress ...
Markus Lazar
doaj   +1 more source

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