5 papers
Minkowski Space holography and Radon transform
Samrat Bhowmick, Koushik Ray
We relate a free scalar field in the Minkowski spacetime with a scalar field with a certain scaling dimension on a sphere of codimension two. This is realised by first performing a…
Topology behind topological insulators
Koushik Ray, Siddhartha Sen
In this paper topological -group calculations for fiber bundles with structure group over tori are carried out to explain why topological insulators have special conduct…
Conformal bootstrap in Mellin space from GG systems
Koushik Ray
A simple scheme to express the Mellin transform of -dimensional Euclidean conformal bootstrap equation is presented by relating conformal blocks to a Gauss-Grassmann (GG) system…
On entropy and complexity of coherent states
Koushik Ray
Consanguinity of entropy and complexity is pointed out through the example of coherent states of the group $SL(d+1,\C)$. Both are obtained from the Kähler potential of the underly…
Conformal integrals in all dimensions as GKZ hypergeometric functions and Clifford groups
Aritra Pal, Koushik Ray
Euclidean conformal integrals for an arbitrary number of points in any dimension are evaluated. Conformal transformations in the Euclidean space can be formulated as the Moebius gr…