A precision re-measurement of the60Ni gamma-gamma directional correlation function

1955 ◽  
Vol 2 (3) ◽  
pp. 471-486 ◽  
Author(s):  
S. Colombo ◽  
A. Rossi ◽  
A. Scotti
Keyword(s):  
Correlation Function ◽  
Directional Correlation Function

scholarly journals Grating Lobes in Higher-Order Correlation Functions of Arrays of Quantum Emitters: Directional Photon Bunching Versus Correlated Directions

Photonics ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 14 ◽  
Author(s):  
Iñigo Liberal ◽  
Iñigo Ederra ◽  
Richard Ziolkowski
Keyword(s):  
Correlation Function ◽  
Antenna Arrays ◽  
Quantum Interference ◽  
Light Emission ◽  
Optical Manipulation ◽  
Light Sources ◽  
The Impact ◽  
Directional Correlation Function ◽  
Identical Quantum ◽  
Quantum Emitters

Recent advances in nanofabrication and optical manipulation techniques are making it possible to build arrays of quantum emitters with accurate control over the locations of their individual elements. In analogy with classical antenna arrays, this poses new opportunities for tailoring quantum interference effects by designing the geometry of the array. Here, we investigate the N th -order directional correlation function of the photons emitted by an array of N initially-excited identical quantum emitters, addressing the impact of the appearance of grating lobes. Our analysis reveals that the absence of directivity in the first-order correlation function is contrasted by an enhanced directivity in the N th -order one. This suggests that the emitted light consists of a superposition of directionally entangled photon bunches. Moreover, the photon correlation landscape changes radically with the appearance of grating lobes. In fact, the photons no longer tend to be bunched along the same direction; rather, they are distributed in a set of correlated directions with equal probability. These results clarify basic aspects of light emission from ensembles of quantum emitters. Furthermore, they may find applications in the design of nonclassical light sources.

On the60Ni gamma-gamma directional correlation function

1955 ◽  
Vol 1 (3) ◽  
pp. 522-523 ◽  
Author(s):  
S. Colombo ◽  
A. Rossi ◽  
A. Scotti
Keyword(s):  
Correlation Function ◽  
Directional Correlation Function

SOME DIRECTIONAL CORRELATION FUNCTIONS FOR SUCCESSIVE NUCLEAR RADIATIONS

1952 ◽  
Vol 30 (2) ◽  
pp. 130-146 ◽  
Author(s):  
F. G. Hess
Keyword(s):  
Correlation Function ◽  
Angular Momentum ◽  
Quantum Number ◽  
Correlation Functions ◽  
The Other ◽  
Gamma Correlation ◽  
Angular Momentum Quantum Number ◽  
Directional Correlation Function

A method of evaluating the sums of angular momentum coefficients appearing in the directional correlation function for successive nuclear radiations is presented. The sums are evaluated for the simplest cases and alpha–gamma and gamma–gamma correlation functions are calculated for these cases—the angular momentum quantum number of one of the emitted particles being arbitrary and that of the other being 1 or 2.

Rate Constants, Reactive Flux

2018 ◽  
Author(s):  
Niels Engholm Henriksen ◽  
Flemming Yssing Hansen
Keyword(s):  
Correlation Function ◽  
Rate Constant ◽  
Cross Sections ◽  
Time Correlation ◽  
Time Correlation Function ◽  
Exact Expression ◽  
Reaction Cross ◽  
Dividing Surface ◽  
Definition Of ◽  
Reactive Flux

This chapter discusses a direct approach to the calculation of the rate constant k(T) that bypasses the detailed state-to-state reaction cross-sections. The method is based on the calculation of the reactive flux across a dividing surface on the potential energy surface. Versions based on classical as well as quantum mechanics are described. The classical version and its relation to Wigner’s variational theorem and recrossings of the dividing surface is discussed. Neglecting recrossings, an approximate result based on the calculation of the classical one-way flux from reactants to products is considered. Recrossings can subsequently be included via a transmission coefficient. An alternative exact expression is formulated based on a canonical average of the flux time-correlation function. It concludes with the quantum mechanical definition of the flux operator and the derivation of a relation between the rate constant and a flux correlation function.

scholarly journals Investigation of local maxima of the modified modular correlation function

2020 ◽  
Vol 1515 ◽  
pp. 042105
Author(s):  
D M Malinichev ◽  
E A Melnikova ◽  
Y V Prus
Keyword(s):  
Correlation Function ◽  
Local Maxima
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