Unitary time evolution for irregular external field problems
Gebhard Grübl and Raimund Vogl
Institut für Theoretische Physik der Universität Innsbruck, A-6020 Innsbruck, Austria
Received 6 September 1991, revised 11 October 1991
Abstract. For second quantized fermionic systems with static first quantized hamiltonian we proof that existence of a Schrödinger picture is not equivalent to the condition defining the regular external field problem.
Helv. Phys. Acta 65, 53 - 55 (1992).
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