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math-ph2003★ 1 cited
Binding energy for hydrogen-like atoms in the Nelson model without cutoffs
Christian Hainzl, Masao Hirokawa, Herbert Spohn
In the Nelson model particles interact through a scalar massless field. For hydrogen-like atoms there is a nucleus of infinite mass and charge , , fixed at the origin an…
math-ph2003★ 14 cited
On the Vacuum Polarization Density Caused by an External Field
Christian Hainzl
We consider an external potential, , due to one or more nuclei. Following the Dirac picture such a potential polarizes the vacuum. The polarization density as derived in physi…