CONSIDERATIONS ON A MESON-ATOMIC MODEL OF THE NUCLEON

1960 ◽  
Vol 38 (10) ◽  
pp. 1245-1255
Author(s):  
L. E. H. Trainor
Keyword(s):  
Field Theory ◽  
Short Range ◽  
Body Problem ◽  
Point Of View ◽  
Atomic Model ◽  
Meson Field ◽  
Many Body ◽  
Screening Effect ◽  
Theory Point ◽  
Insight Into

A model of the nucleon is described in which a π-meson moves about a nucleon core under the action of a hyper-Maxwell field. On such a model, the short range of the internucleon force appears as a screening effect. Despite its obvious limitations, the model does possess some interesting features which lead to results in agreement with experiment. The advantage to such models is that they may provide insight into problems which are enormously difficult from the usual field theory point of view. In particular, one might hope to obtain some understanding of the state of the π -meson field in the nuclear many-body problem.

QLB for Quantum Many-Body and Quantum Field Theory

2018 ◽  
Author(s):  
Sauro Succi
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Quantum Mechanics ◽  
Quantum Computing ◽  
Single Particle ◽  
Body Problem ◽  
Three Dimensions ◽  
Quantum Field ◽  
Many Body ◽  
Quantum Particles

Chapter 32 expounded the basic theory of quantum LB for the case of relativistic and non-relativistic wavefunctions, namely single-particle quantum mechanics. This chapter goes on to cover extensions of the quantum LB formalism to the overly challenging arena of quantum many-body problems and quantum field theory, along with an appraisal of prospective quantum computing implementations. Solving the single particle Schrodinger, or Dirac, equation in three dimensions is a computationally demanding task. This task, however, pales in front of the ordeal of solving the Schrodinger equation for the quantum many-body problem, namely a collection of many quantum particles, typically nuclei and electrons in a given atom or molecule.

scholarly journals Equipment Maintenance Support Analysis Model Based on Field-Theory

2013 ◽  
Vol 347-350 ◽  
pp. 2721-2724
Author(s):  
Wei Yi Wu ◽  
Ping Gu ◽  
Jie Liu ◽  
Bin Liu
Keyword(s):  
Field Theory ◽  
Point Of View ◽  
Application Research ◽  
Analysis Model ◽  
Support Element ◽  
Theory Point ◽  
Angle Of View ◽  
New Research ◽  
Tremendous Challenge ◽  
Support Activity

At present military activities have been influenced deeply by the information revolution, in the same way the equipment support activities are confronted with tremendous challenge and many problems appeared. The equipment support ability is not satisfied with its target in the traditional method along with in-depth research, so needed to quest for a new research angle of view. Through the investigation of electric-particles' movement in physics field, a field-theory point of view from the comparability between the electric-particles and the equipment support elements is introduced which based on spatial distributing of equipment support elements around battlefield and characteristic of support activities. Moreover, the theory and method of the field-theory in the transfer of the support element and energy in support activity is described as the basic for the next application research. The appropriate combination between the natural science and military science has the important meaning for enrichment and development of equipment support theory.

scholarly journals RECENT DEVELOPMENTS IN THE NUCLEAR MANY-BODY PROBLEM

2003 ◽  
Vol 17 (28) ◽  
pp. 5111-5126 ◽  
Author(s):  
R. J. FURNSTAHL
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Body Problem ◽  
Traditional Approach ◽  
Effective Field ◽  
Analytic Structure ◽  
Many Body ◽  
Quarter Century ◽  
Theoretical Approaches ◽  
Recent Developments

The study of quantum chromodynamics (QCD) over the past quarter century has had relatively little impact on the traditional approach to the low-energy nuclear many-body problem. Recent developments are changing this situation. New experimental capabilities and theoretical approaches are opening windows into the richness of many-body phenomena in QCD. A common theme is the use of effective field theory (EFT) methods, which exploit the separation of scales in physical systems. At low energies, effective field theory can explain how existing phenomenology emerges from QCD and how to refine it systematically. More generally, the application of EFT methods to many-body problems promises insight into the analytic structure of observables, the identification of new expansion parameters, and a consistent organisation of many-body corrections, with reliable error estimates.

scholarly journals Higher-form symmetries in 5d

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
David R. Morrison ◽  
Sakura Schäfer-Nameki ◽  
Brian Willett
Keyword(s):  
Field Theory ◽  
Wilson Line ◽  
Geometric Realization ◽  
Point Of View ◽  
Field Theories ◽  
Quantum Field Theories ◽  
Quantum Field ◽  
Geometric Criterion ◽  
Theory Point ◽  
M Theory

Abstract We study higher-form symmetries in 5d quantum field theories, whose charged operators include extended operators such as Wilson line and ’t Hooft operators. We outline criteria for the existence of higher-form symmetries both from a field theory point of view as well as from the geometric realization in M-theory on non-compact Calabi-Yau threefolds. A geometric criterion for determining the higher-form symmetry from the intersection data of the Calabi-Yau is provided, and we test it in a multitude of examples, including toric geometries. We further check that the higher-form symmetry is consistent with dualities and is invariant under flop transitions, which relate theories with the same UV-fixed point. We explore extensions to higher-form symmetries in other compactifications of M-theory, such as G2-holonomy manifolds, which give rise to 4d $$ \mathcal{N} $$ N = 1 theories.

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