About Approximation of Convergence Superoperators in Quantum Perturbation Theory

• Authors: D. Bielińska-Wąż , I. Paidarova , Ph. Durand
• Languages of publication: EN

Abstracts

EN

Perturbation methods are generally used for solving wave operator equations associated with the determination of effective Hamiltonians. In many cases the standard Rayleigh-Schrodinger and Brillouin-Wigner series either converge slowly or diverge. Therefore it is necessary to modify or to renormalize the standard wave equations. For that purpose derivative and convergence superoperators within the Ralyeigh-Schrodinger and Brillouin-Wigner formalisms were introduced. A new efficient otential is obtained and further application to molecular dynamics is indicated.

Keywords

EN

63.10.+a; 71.10.-w

• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 91
• Issue: 6
• Pages: 1061-1068

Dates

published

1997-06

received

1996-08-02

(unknown)

1997-02-06

Contributors

author

D. Bielińska-Wąż

• Instytut Fizyki, Uniwersytet Mikolaja Kopernika, Grudziądzka 5, 87-100 Toruń, Poland

author

I. Paidarova

• J. Heyrovský Institute, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic

author

Ph. Durand

• Laboratoire de Physique Quantique, Unité Associée au CNRS no. 505, Université Paul Sabatier, 31062 Toulouse Cedex 4, France