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J. Chem. Phys. 127, 164105 (2007); http://dx.doi.org/10.1063/1.2795708 (9 pages)

Linear response coupled cluster singles and doubles approach with modified spectral resolution of the similarity transformed Hamiltonian

Karol Kowalski1, Jeff R. Hammond2, and Wibe A. de Jong1

1William R. Wiley Environmental Molecular Sciences Laboratory, Battelle, Pacific Northwest National Laboratory, K8-91, P.O. Box 999, Richland, Washington 99352, USA
2Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, USA and the James Franck Institute, The University of Chicago, Chicago, Illinois 60637, USA

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(Received 10 July 2007; accepted 17 September 2007; published online 23 October 2007)

This paper discusses practical scheme for correcting the linear response coupled cluster with singles and doubles (CCSD) equations by shifting the poles corresponding to the equation-of-motion CCSD excitation energies by adding noniterative corrections due to triples. A simple criterion is derived for the excited states to be corrected in the spectral resolution of similarity transformed Hamiltonian on the CCSD level. Benchmark calculations were performed to compare the accuracies of static and dynamic polarizabilities obtained in this way with the CC3 and CCSDT counterparts.

© 2007 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. THEORY
  3. COMPUTATIONAL DETAILS AND RESULTS
    1. Static and dynamic polarizabilities for the N2 molecule
    2. Polarizabilities for stretched internuclear geometries
  4. CONCLUSIONS

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KEYWORDS and PACS

PACS

  • 31.15.bw

    Coupled-cluster theory

  • 33.15.Kr

    Electric and magnetic moments (and derivatives), polarizability, and magnetic susceptibility

  • 32.30.-r

    Atomic spectra

ARTICLE DATA

PUBLICATION DATA

ISSN

0021-9606 (print)  
1089-7690 (online)

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