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Healthy scalar-tensor theories with higher derivatives

Trobada 2016/2017 
 17 01 2017 11:30
IFIC Seminar Room
Hayato Motohashi
Instituto de Fíisica Corpuscular
Scalar-tensor theories provide models for inflation and dark energy. Many efforts have been made recently for constructing most general scalar-tensor theories with higher-order derivatives in their Lagrangian. Higher derivatives are typically associated with Ostrogradsky ghost which causes unbounded Hamiltonian. I will discuss construction of healthy degenerate theories with higher derivatives which circumvent Ostrogradsky ghost.

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All Dates

  • 17 01 2017 11:30

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