Crypto-Hermiticity of nonanticommutative theories
Abstract
We note that, though nonanticommutative deformations of Minkowski supersymmetric theories do not respect the reality condition and seem to lead to non-Hermitian Hamiltonians H, the latter belong to the class of crypto-Hermitian (or quasi-Hermitian) Hamiltonians having attracted recently a considerable attention. They can be made manifestly Hermitian via the similarity transformation H -> e^R H e^{-R} with a properly chosen R. The deformed model enjoys the same supersymmetry algebra as the undeformed one though it is difficult in some cases to write explicit expressions for a half of supercharges. The deformed SQM models make perfect sense. It is not clear whether it is also the case for NAC Minkowski field theories -- the conventionally defined S--matrix is not unitary there.
- Publication:
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arXiv e-prints
- Pub Date:
- January 2008
- DOI:
- arXiv:
- arXiv:0801.2686
- Bibcode:
- 2008arXiv0801.2686S
- Keywords:
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- High Energy Physics - Theory
- E-Print:
- 9 pages, 1 figure. Invited contribution to the Proceedings of the International Workshop on Supersymmetry and Quantum Symmetries, Dubna, July 30 - August 4, 2007. SQS07