Dissociation energy of the water dimer from quantum Monte Carlo calculations
10.1063/1.2770711
Crossref journal-article
AIP Publishing
The Journal of Chemical Physics (317)
Abstract

We report a study of the electronic dissociation energy of the water dimer using quantum Monte Carlo techniques. We have performed variational quantum Monte Carlo and diffusion quantum Monte Carlo (DMC) calculations of the electronic ground state of the water monomer and dimer using all-electron and pseudopotential approaches. We have used Slater-Jastrow trial wave functions with B3LYP type single-particle orbitals, into which we have incorporated backflow correlations. When backflow correlations are introduced, the total energy of the water monomer decreases by about 4–5mhartree, yielding a DMC energy of −76.42830(5)hartree, which is only 10mhartree above the experimental value. In our pseudopotential DMC calculations, we have compared the total energies of the water monomer and dimer obtained using the locality approximation with those from the variational scheme recently proposed by Casula [Phys. Rev. B 74, 161102–R (2006)]. The time step errors in the Casula scheme are larger, and the extrapolation of the energy to zero time step always lies above the result obtained with the locality approximation. However, the errors cancel when energy differences are taken, yielding electronic dissociation energies within error bars of each other. The dissociation energies obtained in our various all-electron and pseudopotential calculations range between 5.03(7) and 5.47(9)kcal∕mol and are in good agreement with experiment. Our calculations give monomer dipole moments which range between 1.897(2) and 1.909(4)D and dimer dipole moments which range between 2.628(6) and 2.672(5)D.

Bibliography

Gurtubay, I. G., & Needs, R. J. (2007). Dissociation energy of the water dimer from quantum Monte Carlo calculations. The Journal of Chemical Physics, 127(12).

Authors 2
  1. I. G. Gurtubay (first)
  2. R. J. Needs (additional)
References 44 Referenced 59
  1. 10.1063/1.462652 / J. Chem. Phys. (1992)
  2. 10.1063/1.471469 / J. Chem. Phys. (1996)
  3. 10.1016/S0301-0104(98)00121-9 / Chem. Phys. (1998)
  4. 10.1007/s002140050248 / Theor. Chem. Acc. (1997)
  5. 10.1039/a910312k / Phys. Chem. Chem. Phys. (2000)
  6. 10.1063/1.1386416 / J. Chem. Phys. (2001)
  7. 10.1063/1.1423941 / J. Chem. Phys. (2001)
  8. 10.1063/1.1408302 / J. Chem. Phys. (2002)
  9. 10.1103/RevModPhys.73.33 / Rev. Mod. Phys. (2001)
  10. 10.1103/PhysRevLett.95.096801 / Phys. Rev. Lett. (2005)
  11. 10.1103/PhysRevLett.98.025701 / Phys. Rev. Lett. (2007)
  12. 10.1063/1.432868 / J. Chem. Phys. (1976)
  13. 10.1103/PhysRevB.70.235119 / Phys. Rev. B (2004)
  14. 10.1103/PhysRevE.74.066701 / Phys. Rev. E (2006)
  15. 10.1063/1.460849 / J. Chem. Phys. (1991)
  16. 10.1103/PhysRevB.74.161102 / Phys. Rev. B (2006)
  17. 10.1103/PhysRevB.51.13039 / Phys. Rev. B (1995)
  18. {'year': '2006', 'key': '2023080202143848000_c18'} (2006)
  19. {'year': '1998', 'key': '2023080202143848000_c19'} (1998)
  20. 10.1007/BF01120130 / Theor. Chim. Acta (1990)
  21. 10.1063/1.2150818 / J. Chem. Phys. (2006)
  22. 10.1063/1.2338032 / J. Chem. Phys. (2006)
  23. 10.1063/1.464913 / J. Chem. Phys. (1993)
  24. 10.1063/1.1940588 / J. Chem. Phys. (2005)
  25. 10.1002/cpa.3160100201 / Commun. Pure Appl. Math. (1957)
  26. 10.1063/1.1829049 / J. Chem. Phys. (2005)
  27. 10.1063/1.1888569 / J. Chem. Phys. (2005)
  28. 10.1103/PhysRevB.59.12344 / Phys. Rev. B (1999)
  29. 10.1103/PhysRevB.72.085124 / Phys. Rev. B (2005)
  30. 10.1063/1.473770 / J. Chem. Phys. (1997)
  31. 10.1063/1.1318748 / J. Chem. Phys. (2000)
  32. 10.1063/1.1794632 / J. Chem. Phys. (2004)
  33. 10.1080/002689797170284 / Mol. Phys. (1997)
  34. 10.1063/1.2194542 / J. Chem. Phys. (2006)
  35. 10.1063/1.451999 / J. Chem. Phys. (1987)
  36. 10.1063/1.438628 / J. Chem. Phys. (1979)
  37. 10.1063/1.1311289 / J. Chem. Phys. (2000)
  38. 10.1063/1.1514977 / J. Chem. Phys. (2002)
  39. 10.1063/1.433969 / J. Chem. Phys. (1977)
  40. 10.1126/science.275.5301.814 / Science (1997)
  41. 10.1063/1.465599 / J. Chem. Phys. (1993)
  42. 10.1063/1.470701 / J. Chem. Phys. (1995)
  43. 10.1063/1.469499 / J. Chem. Phys. (1995)
  44. {'key': '2023080202143848000_c45'}
Dates
Type When
Created 17 years, 10 months ago (Sept. 25, 2007, 6:11 p.m.)
Deposited 2 years ago (Aug. 1, 2023, 10:17 p.m.)
Indexed 3 weeks, 3 days ago (July 30, 2025, 6:50 a.m.)
Issued 17 years, 10 months ago (Sept. 25, 2007)
Published 17 years, 10 months ago (Sept. 25, 2007)
Published Online 17 years, 10 months ago (Sept. 25, 2007)
Published Print 17 years, 10 months ago (Sept. 28, 2007)
Funders 0

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@article{Gurtubay_2007, title={Dissociation energy of the water dimer from quantum Monte Carlo calculations}, volume={127}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.2770711}, DOI={10.1063/1.2770711}, number={12}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Gurtubay, I. G. and Needs, R. J.}, year={2007}, month=sep }