Results 91 to 100 of about 32,626 (182)

Analytic Fourier-Feynman transforms via the series approximation

, 2019
In this paper, we first establish an evaluation formula to calculate Wiener integrals of functionals on Wiener space. We then apply our evaluation formula to carry out very easily calculating for the analytic Fourier-Feynman transform of the functionals. Some examples are furnished to illustrate the usefulness of the evaluation formula.
openaire   +2 more sources

Photo‐Excitations in Halide Perovskites: Where Do Simulations and Experiments Meet?

Laser &Photonics Reviews, Volume 20, Issue 6, 18 March 2026.
Aiming to bridge the gap between simulations and measurements of light–matter couplings and photo‐excitations in new functional materials, this perspective highlights insights and bottlenecks of state‐of‐the‐art experimental and theoretical methods (2D electronic spectroscopy vs.
Muhammad Sufyan Ramzan, Antonietta De Sio, Alexander Steinhoff, Frank Jahnke, Christoph Lienau, Caterina Cocchi   +5 more
wiley   +1 more source

A smooth introduction to the wavefront set

, 2014
The wavefront set provides a precise description of the singularities of a distribution. Because of its ability to control the product of distributions, the wavefront set was a key element of recent progress in renormalized quantum field theory in curved
Alinhac S, Bogoliubov N N, Bogoliubov N N, Bogoliubov N N, Brouder C, Brunetti R, Cappiello M, Chazarain J, Christian Brouder, Dang N V, Duistermaat J J, Epstein H, Eskin G, Fewster C J, Folland G B, Folland G B, Friedlander F G, Frédéric Hélein, Gelʼfand I M, Grohs P ed Kutyniok G, Harris B, Hollands S, Hörmander L, Hörmander L, Itzykson C, Ivrii V J, Liess O, Maksimović S, Nguyen Viet Dang, Oberguggenberger M, Oberguggenberger M, Peskin M E, Reed M, Rivier D, Schwartz L, Stueckelberg E C G, Stueckelberg E C G, Stueckelberg E C G, Taylor M E, Wagschal C, Zhang H H   +40 more
core   +3 more sources

A Re‐Examination of Foundational Elements of Cosmology

Fortschritte der Physik, Volume 74, Issue 3, March 2026.
ABSTRACT This paper undertakes a conceptual re‐examination of several foundational elements of cosmology through the lens of spacetime symmetries. A new derivation of the Friedmann–Lemaître–Robertson–Walker metric is obtained by a careful conceptual examination of rotations and translations on generic manifolds, followed by solving the rotational and ...
Lavinia Heisenberg
wiley   +1 more source

Monopoles, Clarified

Fortschritte der Physik, Volume 74, Issue 3, March 2026.
ABSTRACT We propose a manifestly duality‐invariant, Lorentz‐invariant, and local action to describe quantum electrodynamics in the presence of magnetic monopoles that derives from Sen's formalism. By employing field strengths as the dynamical variables, rather than potentials, this formalism resolves longstanding ambiguities in prior frameworks.
Aviral Aggarwal, Subhroneel Chakrabarti, Madhusudhan Raman   +2 more
wiley   +1 more source

Alternative Method for Determining the Feynman Propagator of a Non-Relativistic Quantum Mechanical Problem

Symmetry, Integrability and Geometry: Methods and Applications, 2007
A direct procedure for determining the propagator associated with a quantum mechanical problem was given by the Path Integration Procedure of Feynman. The Green function, which is the Fourier Transform with respect to the time variable of the propagator,
Marcos Moshinsky, Emerson Sadurní, Adolfo del Campo   +2 more
doaj  

N=8 Supergravity on the Light Cone

, 2009
We construct the generating functional for the light-cone superfield amplitudes in a chiral momentum superspace. It generates the n-point particle amplitudes which on shell are equivalent to the covariant ones.
A. E. M. van de Ven, B. de Wit, Renata Kallosh   +2 more
core   +1 more source

Ponzano-Regge model revisited III: Feynman diagrams and Effective field theory

, 2005
We study the no gravity limit G_{N}-> 0 of the Ponzano-Regge amplitudes with massive particles and show that we recover in this limit Feynman graph amplitudes (with Hadamard propagator) expressed as an abelian spin foam model.
Akhmedov E T, Barrett J W, Barrett J W, Barrett J W Garcia-Islas J M Martins J F, Davids S, Etera R Livine, Freidel L, Freidel L, Freidel L, Freidel L, Freidel L Louapre D, Freidel L Noui K Roche P, Freidel L Starodubtsev A, Kosinski P Maslanka P Lukierski J Sitarz A, Kowalski-Glikman J, Laurent Freidel, Madore J, Majid S, Meusburger C, Noui K, Oriti D, Perez A, Ponzano G, Reisenberger M P, Rovelli C, Smolin L, Weinberg S   +26 more
core   +2 more sources

Notes on Feynman Integrals and Renormalization [PDF]

, 2010
I review various aspects of Feynman integrals, regularization and renormalization. Following Bloch, I focus on a linear algebraic approach to the Feynman rules, and I try to bring together several renormalization methods found in the literature from a ...
Bergbauer, Christoph
core  

Functional determinants for false vacuum decay

Journal of High Energy Physics
We derive simple expressions to regularise functional determinants from fluctuations of fields with spin 0, 1/2, and 1. These are important for the precise dimensionful determination of false vacuum decay rates.
Pietro Baratella, Miha Nemevšek, Yutaro Shoji, Katarina Trailović, Lorenzo Ubaldi   +4 more
doaj   +1 more source