Abstract:
It was shown in [2] that the energy of the relativistic electron-positron field interacting via a second quantized Coulomb potential in Hartree–Fock approximation is positive provided the fine structure constant is not bigger than 4/π. We show that it is instable if the fine structure constant is above this critical value. We do this partially by adapting an idea of Chaix, Iracane, and Lions [4] leading to an instability problem similar to the one of the no-pair hydrogen hamiltonian [5].
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Received: 28 July 1999 / Accepted: 14 December 1999
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Hundertmark, D., Röhrl, N. & Siedentop, H. The Sharp Bound on the Stability¶of the Relativistic Electron-Positron Field¶in Hartree–Fock Approximation. Comm Math Phys 211, 629–642 (2000). https://doi.org/10.1007/s002200050829
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DOI: https://doi.org/10.1007/s002200050829