Anupam Mazumdar

A setup with magnetic microchips suspends a tiny diamond grain with a special defect that glows like a beacon. The particle enters a state of superposition, existing in two places at once. The goal: entangle two such grains via gravity—if successful, it would prove that attraction itself obeys quant

Matter interferometry creates a Schrödinger's cat for macroscopic masses, opening the path to quantum gravity. A mass in superposition generates two clouds of coherent gravitons — gravitational shadows. Their contrast drops exponentially with increasing mass, signaling the growing entanglement betwe

The exchange of gravitons between a photon and a rotating mirror gives rise to quantum entanglement. The strength of the link depends on the direction of rotation. This brings us closer to experimentally testing quantum gravity.