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19982023
most citedThe nature of , , and

110 citations · 485 across the 58 of their papers we have counts for

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hep-th2009★ 9 cited

The construction of a general inner product in non-Hermitian quantum theory and some explanation for the nonuniqueness of the C operator in PT quantum mechanics

F. Kleefeld

Most recently it has been observed e.g. by Bender and Klevansky (arXiv:0905.4673 [hep-th]) that the C-operator related to a PT-symmetric non-Hermitian Hamilton operator is not uniq…

hep-th2005★ 12 cited

On (non-Hermitian) Lagrangeans in (particle) physics and their dynamical generation

F. Kleefeld

On the basis of a new method to derive the effective action the nonperturbative concept of "dynamical generation" is explained. A non-trivial, non-Hermitian and PT-symmetric soluti…

hep-th2005★ 19 cited

Kurt Symanzik - a stable fixed point beyond triviality

F. Kleefeld

In 1970 Kurt Symanzik proposed a "precarious" phi**4-theory with a negative quartic coupling constant as a valid candidate for an asymptotically free theory of strong interactions.…

hep-th2004★ 11 cited

Non-Hermitian Quantum Theory and its Holomorphic Representation: Introduction and Applications

F. Kleefeld

This article contains a short summary of an oral presentation in the 2nd International Workshop on "Pseudo-Hermitian Hamiltonians in Quantum Physics" (14.-16.6.2004, Villa Lanna, P…

hep-th2004★ 2 cited

Non-Hermitian Quantum Theory and its Holomorphic Representation: Introduction and Some Applications

F. Kleefeld

Present Hermitian Quantum Theory, i.e. Quantum Mechanics and Quantum Field Theory, is revised and replaced by a consistent non-Hermitian formalism called non-Hermitian Quantum Theo…

hep-th2003★ 1 cited

Is a quantum theory of resonances really time asymmetric?

F. Kleefeld

The title "Time Asymmetric Quantum Theory: the Theory of Resonances" (without questionmark) of the CFIF workshop (23.-26.7.2003, Lisbon, Portugal) implies that the theoretical desc…

hep-th2003★ 2 cited

On Symmetries in (Anti)Causal (Non)Abelian Quantum Theories

F. Kleefeld

(Anti)causal boundary conditions being imposed on the (seemingly) Hermitian Quantum Theory (HQT) as described in standard textbooks lead to an (Anti)Causal Quantum Theory ((A)CQT)…