Superposition of Quantum Gaussian Processes: Application in Entanglement Sensing with Levitated Masses

by Mr. Lorenzo Braccini

University College London

at Quantum optics seminar

Wed, 19 Nov 2025, 16:00
Zoom only

Abstract

Link: https://us02web.zoom.us/j/84812706854?pwd=vR4bjxYRoSrHRq57kgATf5DqsiZ9kl.1

Abstract: The Gaussian formalism of Continuous Variables (CV) describes a vast number of systems, from quantum optics to circuit electrodynamics, allowing an operational description suitable for experiments. After an introduction to this topic, I present a generalization of the Gaussian formalism to describe CV systems interacting with qubits, resulting in quantum superpositions of Gaussian processes. This formalism is showcased by analysing the creation of quantum states of matter via the Stern-Gerlach coupling between a qubit and a levitated system. The open entangling dynamics between two Stern-Gerlach interferometers interacting through a quantum force, such as gravity, can be formally treated, providing experimental predictions and bounds on noise. I conclude by introducing a Gaussian protocol to fast delocalize a small initial superposition, thereby exponentially reducing the time to sense the weak gravitationally mediated entanglement.
Bibliography:
• Superposition of Quantum Gaussian Processes, arXiv:2510.01156
• Exponential Expansion of Massive Schrödinger Cats for Sensing and Entanglement, arXiv:2408.11930

Created on 13-11-2025 by Folman, Ron (folman)
Updaded on 13-11-2025 by Folman, Ron (folman)