Ghost-free higher-derivative theory

Details Ghost-free higher-derivative theory Ghost-free higher-derivative theory

2005-03-27

arxiv.org/abs/hep-th/0503213v1

Phys.Lett.B632:433-438,2006

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, 1 figure

Scientific paper

10.1016/j.physletb.2005.10.014

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.

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