Ghost-free higher-derivative theory

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We present an example of the quantum system with higher derivatives in the Lagrangian, which is ghost-free: the spectrum of the Hamiltonian is bounded from below and unitarity is preserved.
13 pages, 1 figure

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High Energy Physics - Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/206523

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-th/0503213
 http://arxiv.org/abs/hep-th/0503213
 Phys.Lett.B632:433-438,2006
 doi:10.1016/j.physletb.2005.10.014

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arXiv