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On the relation between the connected-moments expansion and the Lanczos variational scheme (1994)

Prie, J. D. ; Schwall, D. ; Mancini, J. D. ; [weitere]

Springer

Il nuovo cimento della Società Italiana di Fisica 16 (1994), S. 433-448

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Details

ISSN: 0392-6737

Schlagwort(e): General theories and computational techniques (including many-body perturbation theory, density-functional theory, atomic sphere approximation methods, Fourier decompositon methods, etc.) ; Developments in mathematical and computational techniques ; Numerical approximation and analysis

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Summary The recently introduced Connected-Moments Expansion (CMX) is compared to a variational Lanczos scheme for estimating ground-state energies of many-body systems. A systematic approach is given for three quantum-mechanical systems: harmonic oscillator, anharmonic oscillator and the Kondo model. A second-order analysis is given in terms of particular ratios of moments of the Hamiltonian.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02463732

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