Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-11-08
Phys.Rev.D83:025022,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
version to be published in Physical Review D (incorrect "Keywords" in previous version have been cancelled)
Scientific paper
10.1103/PhysRevD.83.025022
We obtain the following analytical formula which describes the dependence of the electric potential of a point-like charge on the distance away from it in the direction of an external magnetic field B: \Phi(z) = e/|z| [ 1- exp(-\sqrt{6m_e^2}|z|) + exp(-\sqrt{(2/\pi) e^3 B + 6m_e^2} |z|) ]. The deviation from Coulomb's law becomes essential for B > 3\pi B_{cr}/\alpha = 3 \pi m_e^2/e^3 \approx 6 10^{16} G. In such superstrong fields, electrons are ultra-relativistic except those which occupy the lowest Landau level (LLL) and which have the energy epsilon_0^2 = m_e^2 + p_z^2. The energy spectrum on which LLL splits in the presence of the atomic nucleus is found analytically. For B > 3 \pi B_{cr}/\alpha, it substantially differs from the one obtained without accounting for the modification of the atomic potential.
Machet Bruno
Vysotsky M. I.
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