R
R. Loganayagam
Researcher at Tata Institute of Fundamental Research
Publications - 89
Citations - 5703
R. Loganayagam is an academic researcher from Tata Institute of Fundamental Research. The author has contributed to research in topics: Effective field theory & Black hole. The author has an hindex of 37, co-authored 84 publications receiving 5119 citations. Previous affiliations of R. Loganayagam include Princeton University & Institute for Advanced Study.
Papers
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Hydrodynamics from charged black branes
Nabamita Banerjee,Jyotirmoy Bhattacharya,Sayantani Bhattacharyya,Suvankar Dutta,R. Loganayagam,Piotr Surówka,Piotr Surówka +6 more
TL;DR: In this paper, the energy-momentum tensor and charge current for charged rotating black-brane configurations up to second order in the boundary derivative expansion were derived and shown to be covariant under boundary Weyl-transformations.
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Conformal Nonlinear Fluid Dynamics from Gravity in Arbitrary Dimensions
TL;DR: In this paper, a map from the conformal Navier Stokes equations with holographically determined transport coefficients, in d spacetime dimensions, to the set of asymptotically locally AdSd+1 long wavelength solutions of Einstein's equations with a negative cosmological constant, for all 2$>d>2.
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Local fluid dynamical entropy from gravity
Sayantani Bhattacharyya,Veronika E. Hubeny,R. Loganayagam,Gautam Mandal,Shiraz Minwalla,Takeshi Morita,Mukund Rangamani,Harvey S. Reall +7 more
TL;DR: In this article, a boundary derivative expansion is proposed to determine the location of the event horizon in the bulk as a local function of the fluid dynamical variables, and a natural map from the boundary to the horizon using ingoing null geodesics is defined.
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Thermodynamics, gravitational anomalies and cones
TL;DR: In this paper, the authors argue that pure and mixed gravitational anomalies generate a "Casimir momentum" which manifests itself as parity violating coefficients in the hydrodynamic stress tensor and charge current.
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Forced fluid dynamics from gravity
Sayantani Bhattacharyya,R. Loganayagam,Shiraz Minwalla,Suresh Nampuri,Sandip P. Trivedi,Spenta R. Wadia +5 more
TL;DR: In this paper, the authors generalize the computations of [1] to generate long wavelength, asymptotically locally AdS5 solutions to the Einstein-dilaton system with a slowly varying boundary dilaton field and a weakly curved boundary metric.