Results 111 to 120 of about 700,670 (248)
Asymptotics of Feynman Diagrams and The Mellin-Barnes Representation
, 2005 It is shown that the integral representation of Feynman diagrams in terms of the traditional Feynman parameters, when combined with properties of the Mellin--Barnes representation and the so called {\it converse mapping theorem}, provide a very simple ...
Appell +31 more
core +3 more sources
Fortschritte der Physik, Volume 74, Issue 4, April 2026.Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley +1 more source
The column vector calculus for Thermo Field Dynamics of relativistic quantum fields
, 1993 A formalism is discussed which simplifies the calculation of Feynman diagrams at finite temperature.Comment: 10 pages, GSI-Preprint 93-32 ...
Chu +11 more
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Spectral Irradiance Observations and Projections for Solar Cycle 25
Earth and Space Science, Volume 13, Issue 4, April 2026.Abstract The Ozone Monitoring Instrument (OMI) on the Aura satellite makes near‐daily measurements of solar spectral irradiance (SSI) at wavelengths between 265 and 500 nm for instrument calibration purposes. The low degradation and exceptional stability of OMI's calibration during its lifetime facilitates the creation of a new 18‐year OMI Version 7 ...
Matthew T. DeLand +3 more
wiley +1 more source
2-split from Feynman diagrams and expansions
Journal of High Energy PhysicsIn this paper, we investigate the 2-split behavior of tree-level amplitudes of bi-adjoint scalar (BAS), Yang-Mills (YM), non-linear sigma model (NLSM), and general relativity (GR) theories under certain kinematic conditions.
Bo Feng, Liang Zhang, Kang Zhou
doaj +1 more source
Financial Time Series Uncertainty: A Review of Probabilistic AI Applications
Journal of Economic Surveys, Volume 40, Issue 2, Page 915-953, April 2026.ABSTRACT Probabilistic machine learning models offer a distinct advantage over traditional deterministic approaches by quantifying both epistemic uncertainty (stemming from limited data or model knowledge) and aleatoric uncertainty (due to inherent randomness in the data), along with full distributional forecasts.
Sivert Eggen +4 more
wiley +1 more source
SPIN FOAMS AS FEYNMAN DIAGRAMS
2001: A Relativistic Spacetime Odyssey, 2003 It has been recently shown that a certain non-topological spin foam model can be obtained from the Feynman expansion of a field theory over a group. The field theory defines a natural ``sum over triangulations'', which removes the cut off on the number of degrees of freedom and restores full covariance.
Reisenberger, Michael, Rovelli, Carlo
openaire +2 more sources
Advanced Functional Materials, Volume 36, Issue 20, 9 March 2026.This study uncovers a new switching mechanism in HfO2 and ZrO2, where the absence of a non‐polar layer along the a‐direction induces interaction between polar layers. Consequently, the switching barriers for growth are lower than those for nucleation in this direction, leading to a size‐dependent coercive field that matches experimental observations ...
Kun Hee Ye +6 more
wiley +1 more source
Sketching a proof of the Maldacena conjecture at small radius
Journal of High Energy Physics, 2019 At small AdS radius, the superstring on AdS 5 × S 5 was conjectured by Maldacena to be equivalent to N $$ \mathcal{N} $$ = 4 super-Yang-Mills at small ‘t Hooft coupling where thickened Feynman diagrams can be used to compute scattering amplitudes. It was
Nathan Berkovits
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, 2008 We argue that generic one-loop scattering amplitudes in supersymmetric Yang-Mills theories can be computed equivalently with MHV diagrams or with Feynman diagrams. We first present a general proof of the covariance of one-loop non-MHV amplitudes obtained
A. Brandhuber +38 more
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