Improved variational many-body wave function in light nuclei
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American Physical Society
2010
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my.unimap-90332010-08-24T03:03:25Z Improved variational many-body wave function in light nuclei Qamar Nasir, Usmani, Prof. Dr. Singh, A. Khairul Anwar, Mohamad Khazali Rawitscher, G. Light nuclei Variational wave function Many-body system Link to publisher's homepage at http://www.aps.org/ We propose and implement a simple method for improving the variational wave function of a many-body system. We have obtained a significant improvement in the binding energies, wave functions, and variance for the light nuclei H3, He4, and Li6, using the fully realistic Argonne (AV18) two-body and Urbana-IX (UIX) three-body interactions. The energy of He4 was improved by about 0.2 MeV and the Li6 binding energy was increased by ≈ 1.7 MeV compared to earlier variational Monte Carlo results. The latter result demonstrates the significant progress achieved by our method, and detailed analyses of the improved results are given. With central interactions the results are found to be in agreement with the "exact" calculations. Our study shows that the relative error in the many-body wave functions, compared to two-body pair correlations, increases rapidly at least proportionally to the number of pairs in the system. However, this error does not increase indefinitely since the pair interactions saturate owing to convergence of cluster expansion. 2010-08-24T03:03:25Z 2010-08-24T03:03:25Z 2009-09-10 Article Physical Review C - Nuclear Physics, vol.80(3), September 2009 0556-2813 http://link.aps.org/doi/10.1103/PhysRevC.80.034309 http://hdl.handle.net/123456789/9033 en American Physical Society |
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English |
| topic |
Light nuclei Variational wave function Many-body system |
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Light nuclei Variational wave function Many-body system Qamar Nasir, Usmani, Prof. Dr. Singh, A. Khairul Anwar, Mohamad Khazali Rawitscher, G. Improved variational many-body wave function in light nuclei |
| description |
Link to publisher's homepage at http://www.aps.org/ |
| format |
Article |
| author |
Qamar Nasir, Usmani, Prof. Dr. Singh, A. Khairul Anwar, Mohamad Khazali Rawitscher, G. |
| author_facet |
Qamar Nasir, Usmani, Prof. Dr. Singh, A. Khairul Anwar, Mohamad Khazali Rawitscher, G. |
| author_sort |
Qamar Nasir, Usmani, Prof. Dr. |
| title |
Improved variational many-body wave function in light nuclei |
| title_short |
Improved variational many-body wave function in light nuclei |
| title_full |
Improved variational many-body wave function in light nuclei |
| title_fullStr |
Improved variational many-body wave function in light nuclei |
| title_full_unstemmed |
Improved variational many-body wave function in light nuclei |
| title_sort |
improved variational many-body wave function in light nuclei |
| publisher |
American Physical Society |
| publishDate |
2010 |
| url |
http://dspace.unimap.edu.my/xmlui/handle/123456789/9033 |
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1643789290369449984 |