scholarly journals Atoms-Photonic Field Interaction: Influence Functional and Perturbation Theory

10.5772/67774 ◽  
2017 ◽  
Author(s):  
Emmanouil G. Thrapsaniotis
Keyword(s):  
Perturbation Theory ◽  
Field Interaction ◽  
Influence Functional

AN ELEMENTARY UNAMBIGUOUS, COMPLETE RENORMALIZATION PROCEDURE IN NONRELATIVISTIC QUANTUM ELECTRODYNAMICS

1999 ◽  
Vol 13 (01) ◽  
pp. 27-32
Author(s):  
JOSIP SEKE
Keyword(s):  
Perturbation Theory ◽  
Free Electron ◽  
Quantum Electrodynamics ◽  
Time Dependent ◽  
Vacuum Field ◽  
Nonrelativistic Quantum ◽  
Renormalization Procedure ◽  
Field Interaction

A new unambiguous, complete renormalization procedure is presented. Without introducing any energy (or mass) counter terms, by using the elementary time-dependent perturbation theory, it is shown that the renormalization procedure is equivalent to the identification and removement of those terms which stem from the experimentally unobservable free-electron–vacuum-field interaction.

A Perturbation Theory for the Population of Atomic Energy Levels in Non-Lte Plasmas

1988 ◽  
Vol 102 ◽  
pp. 343-347
Author(s):  
M. Klapisch
Keyword(s):  
Perturbation Theory ◽  
Small Parameter ◽  
Classification Scheme ◽  
Sum Rules ◽  
Energy Levels ◽  
Natural Classification ◽  
Quantum Numbers ◽  
Formal Expansion ◽  
Atomic Energy Levels ◽  
As Effects

AbstractA formal expansion of the CRM in powers of a small parameter is presented. The terms of the expansion are products of matrices. Inverses are interpreted as effects of cascades.It will be shown that this allows for the separation of the different contributions to the populations, thus providing a natural classification scheme for processes involving atoms in plasmas. Sum rules can be formulated, allowing the population of the levels, in some simple cases, to be related in a transparent way to the quantum numbers.

Rational and Irrational Beliefs Influence Functional and Dysfunctional Distress

2010 ◽  
Author(s):  
Terry A. Dilorenzo ◽  
Daniel David ◽  
Guy H. Montgomery
Keyword(s):  
Irrational Beliefs ◽  
Influence Functional

Energy, Information, and Superluminal Speed in Quantum Electrodynamics

2020 ◽  
pp. 27-33
Author(s):  
Boris A. Veklenko
Keyword(s):  
Electromagnetic Field ◽  
Perturbation Theory ◽  
Quantum Electrodynamics ◽  
Excited Atom ◽  
Standard Quantum ◽  
Energy Information

Without using the perturbation theory, the article demonstrates a possibility of superluminal information-carrying signals in standard quantum electrodynamics using the example of scattering of quantum electromagnetic field by an excited atom.

MOTIVATION AND PLEASURE IN THE SCHIZOPHRENIA SPECTRUM–FINDINGS FROM THE PRODROME

2008 ◽  
Vol 31 (4) ◽  
pp. 10
Author(s):  
G Foussias ◽  
G Remington ◽  
R Mizrahi
Keyword(s):  
Cognitive Deficits ◽  
Negative Symptoms ◽  
Sampling Method ◽  
Personal Digital Assistant ◽  
Prodromal Phase ◽  
Daily Lives ◽  
Schizophrenia Spectrum ◽  
Influence Functional ◽  
The Moment ◽  
Positive And Negative Symptoms

Background: Schizophreniais a chronic and debilitating illness that affects approximately one percent of the population. The symptoms of schizophrenia are typically thought of in separate domains, including positive symptoms (hallucinations and delusions), negative symptoms (diminished emotional expression and amotivation), and cognitive deficits. Importantly, the negative symptoms have been consistently found to adversely influence functional outcomes, in particular due to markedamotivation.^1 There have been suggestions that these individuals also experience deficits in the experience of pleasure, especially in their capacity to anticipate pleasure.^2 However, such investigations have not included the examination of these symptoms in those in the prodromal phase ofthis illness, a time that holds promise for early intervention and altering thecourse of schizophrenia.^3 Methods: In an effort to examine deficits in motivation and pleasure in the prodromal phase of schizophrenia, we have used an experience sampling method to assess “in the moment” motivation and pleasure in individuals at high risk of developing schizophrenia and healthy controls. Subjects completed baseline assessments including evaluation of their positive and negative symptoms. Subsequently, through the use of a personal digital assistant, subjects rated their motivation and experience of consummatory and anticipatory pleasure in their daily lives, multiple times over the course of four days. Results and Conclusions: Preliminary data will be presented, as well as the importance of these findings in the context of understanding the underlying pathobiology of this illness, and guiding our search for effective treatments to improvefunctional outcomes in schizophrenia. References: 1. Sayers SL, Curran PJ, Mueser KT. Psychol Assessment 1996;8:269-80. 2. Gard DE, Kring AM, Gard GM, et al.. Schizophr Res 2007;93:253-60.

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