Identifying the signatures of quantum gravity through quantum entanglement
Implementing Organization
Indian Institute of Technology (Madras)
Principal Investigator
Dr. Subhajit Barman
Indian Institute of Technology (Madras)
Project Overview
The project aims to combine the general theory of relativity (GTR) and quantum field theory (QFT) to resolve divergences and singularities in QFT and GTR. Quantum gravity (QG) is a new formulation that predicts a minimum accessible length scale between two spacetime points. The study aims to understand these quantum gravity corrections through semi-classical gravity predictions and quantum entanglement-related measures and entanglement harvesting. Quantum entanglement is a phenomenon that distinguishes quantum events from classical ones and is used in quantum information-related tasks like quantum communication and cryptography. The study of entanglement measures will help identify modifications predicted by quantum gravity, particularly due to the conception of a minimum length scale. The project aims to understand the radiative process of entangled Unruh-DeWitt detectors in a spacetime with a quantum gravity corrected propagator, the effects of these corrections on the radiative process of atoms, and the role of quantum gravity corrections in entanglement harvesting from a system. The harvested entanglement may be used in other quantum information-related works like quantum teleportation. Additionally, the project aims to understand the effects of quantum gravitational corrections in the area law of field-theoretic entanglement entropy, which is predicted to be proportional to its event horizon's surface area and perceived through the entanglement entropy of the background quantum field.