223 citations · 1.6k across the 43 of their papers we have counts for
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Modular Witten Diagrams and Quantum Extremality
Abhirup Bhattacharya, Onkar Parrikar
We study entanglement entropy for ball-shaped regions in excited states of holographic conformal field theories. The excited states are prepared by the Euclidean path integral in t…
Covariant phase space and the semi-classical Einstein equation
Abhirup Bhattacharya, Onkar Parrikar
The covariant phase space formalism in general relativity is a covariant method for constructing the symplectic two-form, Hamiltonian and other conserved charges on the phase space…
On the stabilizer complexity of Hawking radiation
Ritam Basu, Onkar Parrikar, Suprakash Paul +1
We study the complexity of Hawking radiation for an evaporating black hole from the perspective of the stabilizer theory of quantum computation. Specifically, we calculate Wigner n…
Entanglement spreading and emergent locality in Brownian SYK chains
Jatin Narde, Onkar Parrikar, Harshit Rajgadia +1
The Ryu-Takayanagi (RT) formula and its interpretation in terms of quantum error correction (QEC) implies an emergent locality for the spread of quantum information in holographic…
Wigner negativity, random matrices and gravity
Ritam Basu, Pratyusha Chowdhury, Anirban Ganguly +3
Given a choice of an ordered, orthonormal basis for a -dimensional Hilbert space, one can define a discrete version of the Wigner function -- a quasi-probability distribution wh…
York time in JT gravity
Onkar Parrikar, Sunil Kumar Sake
The notion of time in general relativity must arise from an internal clock, i.e., a degree of freedom in the gravitational theory internal to the system that can serve the role of…