Contribution of Many-Body Terms to the Energy for Small Water Clusters:  A Comparison of ab Initio Calculations and Accurate Model Potentials

1997 ◽  
Vol 101 (48) ◽  
pp. 9163-9168 ◽  
Author(s):  
Matthew P. Hodges ◽  
Anthony J. Stone ◽  
Sotiris S. Xantheas
Keyword(s):  
Ab Initio Calculations ◽  
Ab Initio ◽  
Water Clusters ◽  
Many Body ◽  
Model Potentials ◽  
Accurate Model ◽  
Small Water

scholarly journals Three-nucleon forces

2014 ◽  
Vol 23 (09) ◽  
pp. 1430015 ◽  
Author(s):  
Peter U. Sauer
Keyword(s):  
Ab Initio Calculations ◽  
Ab Initio ◽  
Body Problem ◽  
Many Body ◽  
Nuclear Systems ◽  
The Difference

In this paper, the role of three-nucleon forces in ab initio calculations of nuclear systems is investigated. The difference between genuine and induced many-nucleon forces is emphasized. Induced forces arise in the process of solving the nuclear many-body problem as technical intermediaries toward calculationally converged results. Genuine forces make up the Hamiltonian. They represent the chosen underlying dynamics. The hierarchy of contributions arising from genuine two-, three- and many-nucleon forces is discussed. Signals for the need of the inclusion of genuine three-nucleon forces are studied in nuclear systems, technically best under control, especially in three-nucleon and four-nucleon systems. Genuine three-nucleon forces are important for details in the description of some observables. Their contributions to observables are small on the scale set by two-nucleon forces.

Identifying 2- and 3-coordinated H2O in protonated ion–water clusters by vibrational pre-dissociation spectroscopy and ab initio calculations

1997 ◽  
Vol 107 (22) ◽  
pp. 9695-9698 ◽  
Author(s):  
Y.-S. Wang ◽  
J. C. Jiang ◽  
C.-L. Cheng ◽  
S. H. Lin ◽  
Y. T. Lee ◽  
...  
Keyword(s):  
Ab Initio Calculations ◽  
Ab Initio ◽  
Water Clusters

scholarly journals Single-electron description of the strong-field electron detachment of hydrogen negative ion

2016 ◽  
Vol 14 (1) ◽  
pp. 27-36
Author(s):  
Milan Milosevic ◽  
Nenad Simonovic
Keyword(s):  
Ab Initio Calculations ◽  
Ab Initio ◽  
Short Range ◽  
Strong Field ◽  
Single Electron ◽  
Negative Ion ◽  
Multiphoton Processes ◽  
Electron Detachment ◽  
Electron Model ◽  
Model Potentials

The applicability of the single-electron model in describing the electron detachment of the hydrogen negative ion in strong (static or laser) fields is examined. By comparing the values for the lowest state energies and detachment rates obtained using two different short-range model-potentials with the results of recent ab initio calculations using the full two-electron description (Milosevic and Simonovic, 2016), it is found that the single-electron description is applicable for the field intensities up to few hundred GW/cm2. This description, therefore, can be used for studying multiphoton processes or the electron detachment via tunneling at these field strengths, but fails in over-the-barrier regime.

Ab initio calculations of many-body energy expansion in Linn+F? clusters

1992 ◽  
Vol 41 (2) ◽  
pp. 281-292 ◽  
Author(s):  
A. S. Shalabi ◽  
M. A. Kamel ◽  
Kh. M. Eid
Keyword(s):  
Ab Initio Calculations ◽  
Ab Initio ◽  
Many Body ◽  
Body Energy ◽  
Energy Expansion

Ab initio calculations of many-body interactions for compressed solid argon

2015 ◽  
Vol 143 (17) ◽  
pp. 174506 ◽  
Author(s):  
Chunling Tian ◽  
Fusheng Liu ◽  
Lingcang Cai ◽  
Hongkuan Yuan ◽  
Hong Chen ◽  
...  
Keyword(s):  
Ab Initio Calculations ◽  
Ab Initio ◽  
Many Body ◽  
Solid Argon ◽  
Many Body Interactions
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