Excited States of weakly bound bosonic clusters: discrete variable representation and quantum Monte Carlo

The Journal of Physical Chemistry. a
M P Nightingale, Pierre-Nicholas Roy

Abstract

We compare two approaches for the accurate calculation of the energy levels of weakly bound boson trimers. The first approach is based on correlation function Monte Carlo employing optimized trial functions, while the second approach is based on the discrete variable representation. A trimer with atoms of half the mass of neon is used as a test problem for benchmark calculations. The two approaches yield identical results, within error bars, for all the J = 0 energy levels below the dissociation threshold. The relative merits of the two techniques are discussed, and a perspective is given for extension to larger clusters.

References

Jul 20, 2001·Physical Review Letters·M P Nightingale, V Melik-Alaverdian
Sep 21, 2002·Science·Jian TangWolfgang Jäger
Nov 13, 2003·Physical Review Letters·Yunjie XuA R W McKellar
Aug 12, 2004·The Journal of Chemical Physics·Saverio MoroniPierre-Nicholas Roy
Jul 23, 2005·The Journal of Chemical Physics·M P Nightingale, Mervlyn Moodley

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Citations

Nov 18, 2009·The Journal of Chemical Physics·E AsareJ D Doll
Dec 3, 2008·The Journal of Chemical Physics·Moses SalciEvgeny Yarevsky
Jul 10, 2014·The Journal of Chemical Physics·Nabil FarukPierre-Nicholas Roy
Oct 31, 2015·The Journal of Physical Chemistry. a·Matthew SchmidtPierre-Nicholas Roy
Oct 4, 2006·The Journal of Chemical Physics·Javier Eduardo Cuervo, Pierre-Nicholas Roy
Nov 11, 2019·The Journal of Chemical Physics·János SarkaBill Poirier
Nov 13, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·T E Booth, J E Gubernatis
Apr 27, 2007·The Journal of Physical Chemistry. a·Xiao-Gang Wang, Tucker Carrington

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