The independent-pair approximation

2004 ◽  
pp. 26-35
Keyword(s):  
Pair Approximation ◽  
Independent Pair

On the single-particle-energy spectrum of a Λ particle in nuclear matter

1970 ◽  
Vol 48 (23) ◽  
pp. 2804-2808 ◽  
Author(s):  
K. F. Chong ◽  
Y. Nogami ◽  
E. Satoh
Keyword(s):  
Energy Spectrum ◽  
Nuclear Matter ◽  
Single Particle ◽  
Short Range ◽  
Particle Energy ◽  
Pair Approximation ◽  
Single Particle Energy ◽  
Short Range Repulsion ◽  
Separable Potentials ◽  
Independent Pair

The single-particle-energy spectrum of a Λ particle in nuclear matter is examined in the independent-pair approximation, by assuming nonlocal separable potentials for the ΛN interaction. Effects of short-range repulsion in the ΛN interaction on the Λ binding are also examined in terms of separable potentials of rank two.

The coupled-pair approximation in a basis of independent-pair natural orbitals

1976 ◽  
Vol 41 (3) ◽  
pp. 444-449 ◽  
Author(s):  
Peter R. Taylor ◽  
G.B. Bacskay ◽  
N.S. Hush ◽  
A.C. Hurley
Keyword(s):  
Pair Approximation ◽  
Natural Orbitals ◽  
Independent Pair

Independent pair approximation for attractive bose condensates

2007 ◽  
Vol 371 (1-2) ◽  
pp. 7-10 ◽  
Author(s):  
George E. Cragg ◽  
Arthur K. Kerman
Keyword(s):  
Pair Approximation ◽  
Bose Condensates ◽  
Independent Pair

Phosphorus-31 chemical shieldings in a fused cis-1,2,3-benzothiadiphosphole: a dipolar NMR study

1992 ◽  
Vol 70 (4) ◽  
pp. 1229-1235 ◽  
Author(s):  
Gang Wu ◽  
Roderick E. Wasylishen ◽  
William P. Power ◽  
Graziano Baccolini
Keyword(s):  
Line Shape ◽  
Magic Angle Spinning ◽  
Pair Approximation ◽  
Magic Angle ◽  
Single Bond ◽  
Chemical Shielding ◽  
Spin Pair ◽  
Nmr Study ◽  
Shielding Tensors ◽  
Angle Spinning

Phosphorus-31 NMR static powder spectra and high-resolution magic angle spinning spectra have been obtained for a new heterocyclic compound, cis-2,10-dimethyl[1,2,3]benzothiadiphospholo[2,3b][1,2,3]benzothiadiphosphole (1), which contains a P(III)—P(III) single bond. The homonuclear 31P–31P dipolar interaction manifests itself in both the magic angle spinning spectra and the non-spinning line shape. Under the AX spin pair approximation, analysis of the spinning sidebands in the MAS experiment yields a full characterization of the two 31P chemical shielding tensors. This approximation is confirmed by the exact powder line shape simulation for a homonuclear spin pair. Analysis of the dipolar subspectra also yields the absolute sign of 1J(P,P), which is found to be negative. Keywords: phosphorus–phosphorus single bond, chemical shielding tensors, dipolar NMR, MAS, static line shape.

scholarly journals Pair approximation model for the vaccination game: predicting the dynamic process of epidemic spread and individual actions against contagion

2021 ◽  
Vol 477 (2246) ◽  
pp. 20200769
Author(s):  
Kazuki Kuga ◽  
Masaki Tanaka ◽  
Jun Tanimoto
Keyword(s):  
Dynamic Process ◽  
Mean Field ◽  
Field Approximation ◽  
Mean Field Approximation ◽  
Pair Approximation ◽  
Order Effects ◽  
Epidemic Spread ◽  
Underlying Network ◽  
Individual Actions ◽  
Individual Decisions

We successfully establish a theoretical framework of pairwise approximation for the vaccination game in which both the dynamic process of epidemic spread and individual actions in helping prevent social behaviours are quantitatively evaluated. In contrast with mean-field approximation, our model captures higher-order effects from neighbours by using an underlying network that shows how the disease spreads and how individual decisions evolve over time. This model considers not only imperfect vaccination but also intermediate protective measures other than vaccines. Our analytical predictions are validated by multi-agent simulation results that estimate random regular graphs at varying degrees.

Microscopic description of β-band in the collective pair approximation

1983 ◽  
Vol 411 (2) ◽  
pp. 181-194 ◽  
Author(s):  
Enrico Maglione ◽  
Andrea Vitturi ◽  
Francesco Catara ◽  
Antonio Insolia
Keyword(s):  
Pair Approximation ◽  
Microscopic Description
Sign in / Sign up

Export Citation Format

Share Document