Exactness of Two-Body Cluster Expansions in Many-Body Quantum Theory
Abstract
The Horn-Weinstein formula and the variational principle, combined with numerical results for a few many-electron systems, are used to provide support for a conjecture that the exact ground-state wave function for a Hamiltonian system containing up to two-body terms may be represented by an exponential cluster expansion employing a finite two-body operator.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2003
- DOI:
- Bibcode:
- 2003PhRvL..90k3001P
- Keywords:
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- 31.15.-p;
- 31.10.+z;
- 31.25.-v;
- 71.10.-w;
- Calculations and mathematical techniques in atomic and molecular physics;
- Theory of electronic structure electronic transitions and chemical binding;
- Electron correlation calculations for atoms and molecules;
- Theories and models of many-electron systems