Gauge Invariance on Bound State Energy Levels
نویسنده
چکیده
In this paper the problem of the gauge in a bound state calculation is discussed. In particular, in order to verify the gauge invariance in the energy levels expansion, some set of gauge invariant contributions are given. Talk given at the NATO-ASI, Electron Theory and Quantum Electrodynamics, Edirne 8-16 September 1994 E-mail: [email protected]
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