Search results for "Theoretical physics"
showing 10 items of 751 documents
The Evolution of the Celsius and Kelvin Temperature Scales and the State of the Art
1999
A physical analysis is given of the evolution undergone by the Celsius and Kelvin temperature scales, from their definition to the present day. It is shown that in the temperature interval between ...
Relativistic Electronic Structure Theory. Part 1. Fundamentals. By Peter Schwerdtfeger.
2004
Elementary Particle Physics; Present and Future
1996
Quantum Field Theory
2018
Quantum field theory (QFT) shares many of its philosophical problems with quantum mechanics. This applies in particular to the quantum measurement process and the connected interpretive problems, to which QFT contributes hardly any new aspects, let alone solutions. The question as to how the objects described by the theory are spatially embedded was already also discussed for quantum mechanics. However, the new mathematical structure of QFT promises new answers, which renders the spatiotemporal interpretation of QFT the pivotal question. In this chapter, we sketch the mathematical characteristics of QFT and show that a particle as well as a field interpretation breaks down.
The su(2|1) Model of Electroweak Interactions and Its Connection to NC Geometry
2002
I review the su(2|1) model of electroweak interactions which is essentially based on the super Lie algebra su(2|1), thus incorporating both usual gauge fields and Higgs fields in one generalized Yang-Mills field. Special emphasis is put on the natural appearance of spontaneous symmetry breaking and other appealing features of the model like generation mixing. Also the connection of the model to noncommutative geometry is briefly discussed.
Russian Formalism vs Germanic Formalism: exploring the concept of European Formalism
2021
Abstract This comparative reading of two conceptual corpora, Russian formalism and Germano-Austrian or Germanic formalism, begins with the idea that the European formalism presents a coherent unit. The continuity of this program authorizes such a comparative reading. The comparative analysis of formalisms in Europe could be a research program aimed at an epistemological reading of the phenomenon of European formalism at the turn of the 20th century. This program deals with a rereading of two conceptual fields–Russian formalism and Germanic (Germano-Austrian) formalism. This study seeks to contextualise the formalist project within the knowledge of its time by showing its genetic links with …
Back Cover: First-principles calculations of point defects in inorganic nanotubes (Phys. Status Solidi B 4/2013)
2013
1H and 13C shielding measurements in comparison with DFT calculations performed for two 2-(acetyloamino)-N,N-dimethyl-3-phenylacrylamide isomers
2015
Abstract We present measurements of 1H and 13C shielding for (2E)- and (2Z)-2-(acetyloamino)-N,N-dimethyl-3-phenylacrylamide isomers in solutions. Practically the same values of the shielding were obtained using internal and external referencing. For the interpretation, we explore DFT calculations of shieldings performed at the rovibrationally averaged geometries. The comparison of the experimental and theoretical results is verified both for the shielding and chemical shift. It appears that some inaccuracies in the calculations of the chemical shift can be reduced due to the error compensation while subtracting the reference shielding. As shown the measurement of magnetic shielding can be …
Pseudo-Bosons, So Far
2011
In the past years several extensions of the canonical commutation relations have been proposed by different people in different contexts and some interesting physics and mathematics have been deduced. Here, we review some recent results on the so-called {\em pseudo-bosons}. They arise from a special deformation of the canonical commutation relation $[a,a^\dagger]=\1$, which is replaced by $[a,b]=\1$, with $b$ not necessarily equal to $a^\dagger$. We start discussing some of their mathematical properties and then we discuss several examples.
More on Diagrams
2017
The aim of this chapter is to introduce and study additional structures on a diagram such that its diagram category becomes a rigid tensor category. The assumptions are tailored to the application to Nori motives.