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On the instability of classical dynamics in theories with higher derivatives

V. V. Nesterenko

hep-tharXiv:hep-th/0612265

Abstract

The development of instability in the dynamics of theories with higher derivatives is traced in detail in the framework of the Pais-Uhlenbeck fourth oder oscillator. For this aim the external friction force is introduced in the model and the relevant solutions to equations of motion are investigated. As a result, the physical implication of the energy unboundness from below in theories under consideration is revealed.

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