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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