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Expectation values in relativistic Coulomb problems

Sergei K Suslov

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We evaluate the matrix elements langOrprang, where O =\left\{1,\beta,{\rm i}{\bm \alpha \bf n}\beta \right\} are the standard Dirac matrix operators and the angular brackets denote the quantum-mechanical average for the relativistic Coulomb problem, in terms of generalized hypergeometric functions 3F2(1) for all suitable powers. Their connections with the Chebyshev and Hahn polynomials of a discrete variable are emphasized. As a result, we derive two sets of Pasternack-type matrix identities for these integrals, when p → −p − 1 and p → −p − 3, respectively. Some applications to the theory of hydrogenlike relativistic systems are reviewed.


PACS

03.65.Pm Relativistic wave equations

31.30.J- Relativistic and quantum electrodynamic (QED) effects in atoms, molecules, and ions

02.10.Yn Matrix theory

03.65.Db Functional analytical methods

Subjects

Atomic and molecular physics

Mathematical physics

Quantum information and quantum mechanics

Dates

Issue 18 (28 September 2009)

Received 2 July 2009, in final form 3 August 2009

Published 9 September 2009



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