Magnetic moment of the positronium ion and virial relations
arXiv:1501.00257 · doi:10.1103/PhysRevA.91.012514
Abstract
We derive a hypervirial relation for the positronium ion, a three-body bound state of two electrons and a positron. It relates expectation values of three operators and reconciles two recently published, seemingly inequivalent formulas for the magnetic moment of the ion. As a by-product, the precision of the leading binding correction is improved.
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