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Unitary perturbation theory: a generalization of two-by-two rotations (2000)

Mayer, I.

Springer

Theoretical chemistry accounts 104 (2000), S. 163-166

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ISSN: 1432-2234

Keywords: Key words: Unitary transformations – Two-by-two rotations – Perturbation theory

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Abstract. A generalization of the two-by-two rotation technique is proposed, permitting a whole row (column) of the matrix to be treated simultaneously. The method is based on the explicit analytical evaluation of the matrix exponent representing a symmetric combination of the individual rotations. Besides constructing the unitary transformation matrices, a new orthogonalization algorithm is also proposed. The resulting “unitary perturbation theory” and orthogonalization method may be useful in different areas.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s002140000124

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