February 26, 2013Journal of Cosmology and Astroparticle Physics149 citationsOpen Access

Higher derivative theories with constraints: exorcising Ostrogradski's ghost

TCTai-jun Chen MFMatteo Fasiello ELEugene A. Lim

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Abstract

We prove that the linear instability in a non-degenerate higher derivative theory, the Ostrogradski instability, can only be removed by the addition of constraints if the original theory's phase space is reduced.

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synapsesocial.com/papers/6a63084d621d213327b6d9e4 https://doi.org/https://doi.org/10.1088/1475-7516/2013/02/042