FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2004621007> ?p ?o ?g. }

• W2004621007 endingPage "1537" @default.
• W2004621007 startingPage "1525" @default.
• W2004621007 abstract "In the previous articles of this series, dealing with the interaction between a number of molecules and the electromagnetic field in a resonant cavity, both the molecules and the field were treated by perturbation theory. The perturbation restriction on the field is removed in the present article, allowing large changes in the field, but the molecules are still assumed to undergo a small change during the time under consideration. The justification for this type of analysis, involving the generalization of the conventional concepts of induced and spontaneous emission, the applicability to a molecular amplifier during the buildup period, and the re-examination of a calculation by Serber and Townes concerning the fundamental limits of molecular amplification, is discussed.Two different molecular distributions are considered. In one (the resonant case) all molecules have the same frequency as the cavity, and in the other (the nonresonant case) there is a uniform frequency distribution. The molecules are assumed to be initially in an emissive state. Several types of driving fields are considered. Expressions are obtained for the field operators by the solution of a Volterra integral equation, and expectation values are obtained for the field strength and field energy.In the resonant case, both the coherent and incoherent fields increase exponentially after a sufficiently long time, no matter how small the initial gain is. Their ratio becomes constant and is equal to the number of photons in the driving field only in the absence of dissipation. An interesting related result is the fact that the signal-to-noise ratio for constant signal input power increases as the cavity dissipation increases. An estimate of the total time for which the theory is valid is obtained from a consideration of the energy emitted by the molecules. Contact is made with perturbation theory for sufficiently small gain and short time.In the nonresonant case the effect of the molecules is shown to be that of a negative dissipation. In contrast to the resonant case, the gain becomes exponential only if the negative dissipation exceeds, in absolute value, the true dissipation. The ratio of induced to spontaneous emission is, in this case also, equal to the number of photons in the driving field only in the absence of disipation. However, the signal-to-noise ratio for constant input power drops with increasing cavity dissipation." @default.
• W2004621007 created "2016-06-24" @default.
• W2004621007 creator A5012517665 @default.
• W2004621007 date "1961-09-01" @default.
• W2004621007 modified "2023-10-16" @default.
• W2004621007 title "Induced and Spontaneous Emission in a Coherent Field. IV" @default.
• W2004621007 cites W2062043805 @default.
• W2004621007 cites W2085266026 @default.
• W2004621007 cites W3149050277 @default.
• W2004621007 cites W4235522902 @default.
• W2004621007 cites W4256048082 @default.
• W2004621007 doi "https://doi.org/10.1103/physrev.123.1525" @default.
• W2004621007 hasPublicationYear "1961" @default.
• W2004621007 type Work @default.
• W2004621007 sameAs 2004621007 @default.
• W2004621007 citedByCount "18" @default.
• W2004621007 countsByYear W20046210072016 @default.
• W2004621007 countsByYear W20046210072019 @default.
• W2004621007 crossrefType "journal-article" @default.
• W2004621007 hasAuthorship W2004621007A5012517665 @default.
• W2004621007 hasConcept C115260700 @default.
• W2004621007 hasConcept C121332964 @default.
• W2004621007 hasConcept C135402231 @default.
• W2004621007 hasConcept C159317903 @default.
• W2004621007 hasConcept C177918212 @default.
• W2004621007 hasConcept C184779094 @default.
• W2004621007 hasConcept C187309904 @default.
• W2004621007 hasConcept C202444582 @default.
• W2004621007 hasConcept C28843909 @default.
• W2004621007 hasConcept C3079626 @default.
• W2004621007 hasConcept C33923547 @default.
• W2004621007 hasConcept C62520636 @default.
• W2004621007 hasConcept C83581075 @default.
• W2004621007 hasConcept C9652623 @default.
• W2004621007 hasConceptScore W2004621007C115260700 @default.
• W2004621007 hasConceptScore W2004621007C121332964 @default.
• W2004621007 hasConceptScore W2004621007C135402231 @default.
• W2004621007 hasConceptScore W2004621007C159317903 @default.
• W2004621007 hasConceptScore W2004621007C177918212 @default.
• W2004621007 hasConceptScore W2004621007C184779094 @default.
• W2004621007 hasConceptScore W2004621007C187309904 @default.
• W2004621007 hasConceptScore W2004621007C202444582 @default.
• W2004621007 hasConceptScore W2004621007C28843909 @default.
• W2004621007 hasConceptScore W2004621007C3079626 @default.
• W2004621007 hasConceptScore W2004621007C33923547 @default.
• W2004621007 hasConceptScore W2004621007C62520636 @default.
• W2004621007 hasConceptScore W2004621007C83581075 @default.
• W2004621007 hasConceptScore W2004621007C9652623 @default.
• W2004621007 hasIssue "5" @default.
• W2004621007 hasLocation W20046210071 @default.
• W2004621007 hasOpenAccess W2004621007 @default.
• W2004621007 hasPrimaryLocation W20046210071 @default.
• W2004621007 hasRelatedWork W1971159631 @default.
• W2004621007 hasRelatedWork W1997086491 @default.
• W2004621007 hasRelatedWork W2021285678 @default.
• W2004621007 hasRelatedWork W2029830845 @default.
• W2004621007 hasRelatedWork W2033150811 @default.
• W2004621007 hasRelatedWork W2054061985 @default.
• W2004621007 hasRelatedWork W2065618421 @default.
• W2004621007 hasRelatedWork W2122040273 @default.
• W2004621007 hasRelatedWork W2123750757 @default.
• W2004621007 hasRelatedWork W2765848447 @default.
• W2004621007 hasVolume "123" @default.
• W2004621007 isParatext "false" @default.
• W2004621007 isRetracted "false" @default.
• W2004621007 magId "2004621007" @default.
• W2004621007 workType "article" @default.