Perturbative Approach to Higher Derivative and Nonlocal Theories

Details Perturbative Approach to Higher Derivative and Nonlocal Theories Perturbative Approach to Higher Derivative and Nonlocal Theories

2001-11-19

arxiv.org/abs/hep-th/0111160v3

Nucl.Phys.B625:151-165,2002

Physics

High Energy Physics

High Energy Physics - Theory

19 pages, Latex, reference added

Scientific paper

10.1016/S0550-3213(02)00020-2

We review a perturbative approach to deal with Lagrangians with higher or infinite order time derivatives. It enables us to construct a consistent Poisson structure and Hamiltonian with only first time derivatives order by order in coupling. To the lowest order, the Hamiltonian is bounded from below whenever the potential is. We consider spacetime noncommutative field theory as an example.

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