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Jury I. Radkovski on Muck Rack

Jury I. Radkovski

As seen in: Physical Review B
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Articles

Effective action for dissipative and nonholonomic systems

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By Jury I. Radkovski, Sergey M. Sibiryakov, Afshin Besharat
| Physical Review B
We show that the action of a dynamical system can be supplemented by an effective action for its environment to reproduce arbitrary coordinate dependent ohmic dissipation and gyroscopic forces. The action is a generalization of the harmonic bath model and describes a set of massless interacting scalar fields in an auxiliary space coupled to the original system at the boundary. A certain limit of the model implements nonholonomic constraints.
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Scattering amplitudes in high-energy limit of projectable Ho\ifmmode \check{r}\else \v{r}\fi{}ava gravity

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By Jury I. Radkovski, Sergey M. Sibiryakov
| Physical Review B
We study the high-energy limit of projectable Hořava gravity using on-shell graviton scattering amplitudes. We compute the tree-level amplitudes using symbolic computer algebra and analyze their properties in the case of collisions with zero total momentum. The amplitudes grow with collision energy in the way consistent with tree-level unitarity.
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