On the unitarity of higher-dervative and nonlocal theories

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We consider two simple models of higher-derivative and nonlocal quantu systems.It is shown that, contrary to some claims found in literature, they can be made unitary.
8 pages, no figures

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Quantum Physics, High Energy Physics - Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/180850

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/quant-ph/0612091
 http://arxiv.org/abs/quant-ph/0612091
 J.Phys.A40:11561-11568,2007
 doi:10.1088/1751-8113/40/38/008

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