68 citations · 286 across the 14 of their papers we have counts for
15 papers
The Loss Floor of Denoising Score Matching: Fisher Geometry from Schrödinger Bridges
Avinash Raju, Kai Zhang
Denoising score matching trains diffusion models by regressing onto a conditional score, although generation ultimately requires the marginal score. The two objectives share the sa…
Black hole singularities across phase transitions
Yan Liu, Hong-Da Lyu, Avinash Raju
We study the behavior of black hole singularities across the Hawking-Page phase transitions, uncovering possible connections between the physics inside and outside the horizon. We…
Quantum Chaos in Topologically Massive Gravity
Yan Liu, Avinash Raju
We study quantum chaos of rotating BTZ black holes in Topologically Massive gravity (TMG). We discuss the relationship between chaos parameters including Lyapunov exponents and but…
Aspects of Higher Spin Theories, Conformal Field Theories and Holography
Avinash Raju
This dissertation consists of three parts. The first part of the thesis is devoted to the study of gravity and higher spin gauge theories in 2+1 dimensions. The first part deals wi…
Contractions from Grading
Chethan Krishnan, Avinash Raju
We note that large classes of contractions of algebras that arise in physics can be understood purely algebraically, via identifying appropriate -gradings (and their…
Chiral Higher Spin Gravity
Chethan Krishnan, Avinash Raju
We construct a candidate for the most general chiral higher spin theory with AdS boundary conditions. In the Chern-Simons language, on the left it has the Drinfeld-Sokolov redu…
A Dynamical Boundary for Anti-de Sitter Space
Chethan Krishnan, Avinash Raju, P. N. Bala Subramanian
We argue that a natural boundary condition for gravity in asymptotically AdS spaces is to hold the {\em renormalized} boundary stress tensor density fixed, instead of the boundary…
An Alternate Path Integral for Quantum Gravity
Chethan Krishnan, K. V. Pavan Kumar, Avinash Raju
We define a (semi-classical) path integral for gravity with Neumann boundary conditions in dimensions, and show how to relate this new partition function to the usual picture o…
A Neumann Boundary Term for Gravity
Chethan Krishnan, Avinash Raju
The Gibbons-Hawking-York (GHY) boundary term makes the Dirichlet problem for gravity well defined, but no such general term seems to be known for Neumann boundary conditions. In th…
-Expansion in the Gross-Neveu CFT
Avinash Raju
We use the recently developed CFT techniques of Rychkov and Tan to compute anomalous dimensions in the Gross-Neveu model in dimensions. To do this, we extend the "co…
Gauging Away a Big Bang
Chethan Krishnan, Avinash Raju
We argue that in the tensionless phase of string theory where the stringy gauge symmetries are unbroken, (at least some) cosmological singularities can be understood as gauge artef…
A Note on D1-D5 Entropy and Geometric Quantization
Chethan Krishnan, Avinash Raju
We quantize the space of 2-charge fuzzballs in IIB supergravity on . The resulting entropy precisely matches the D1-D5 black hole entropy, including a specific numerical coeffi…
3D Gravity, Chern-Simons and Higher Spins: A Mini Introduction
K. Surya Kiran, Chethan Krishnan, Avinash Raju
These are notes of introductory lectures on (a) elements of 2+1 dimensional gravity, (b) some aspects of its relation to Chern-Simons theory, (c) its generalization to couple highe…
A Grassmann Path From AdS_3 to Flat Space
Chethan Krishnan, Avinash Raju, Shubho Roy
We show that interpreting the inverse AdS_3 radius 1/l as a Grassmann variable results in a formal map from gravity in AdS_3 to gravity in flat space. The underlying reason for thi…
Higher Spin Cosmology
Chethan Krishnan, Avinash Raju, Shubho Roy +1
We construct cosmological solutions of higher spin gravity in 2+1 dimensional de Sitter space. We show that a consistent thermodynamics can be obtained for their horizons by demand…