Second-order equations for fermions in Coulomb field match Dirac spectrum for attraction but introduce an energy-dependent impermeable barrier for repulsion.
Foldy-Wouthyusen wave functions and conditions of transformation between Dirac and Foldy-Wouthuysen representations
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abstract
The block-diagonalization of the Hamiltonian is not sufficient for the transformation to the Foldy-Wouthuysen (FW) representation. The conditions enabling the transition from the Dirac representation to the FW one are formulated and proved. The connection between wave functions in the two representations is derived. The results obtained allows calculating expectation values of operators corresponding to main classical quantities.
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physics.gen-ph 1years
2019 1verdicts
UNVERDICTED 1representative citing papers
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Second-order stationary solutions for fermions in an external Coulomb field
Second-order equations for fermions in Coulomb field match Dirac spectrum for attraction but introduce an energy-dependent impermeable barrier for repulsion.