Speaker
Description
Gravitationally Induced Entanglement (GIE) between two levitated objects in quantum states can investigates the quantum nature of the gravitational field in a tabletop experiment. To formally treat the entangling dynamics — both unitary and open — between superpositions of quantum states of matter entangled with a qubit, the Gaussian formalism of continuous-variable systems can be extended to include non-Gaussian states. This is achieved by considering a “superposition of phase spaces,” each characterized by an associated covariance matrix and a vector of first moments. Thus, we propose a protocol to exponentially delocalize a cat state of a massive object, which can be successfully recombined to complete an interferometer. When two such interferometers interact via gravity, GIE can be sensed exponentially fast in the expansion time — if gravity is not classical. The introduced formalism allows noise analysis of the protocol.
