I would plan to speak about the test of the quantum character of general relativistic aspects of gravity (2&3 below) but may also discuss some specific challenges in such experiments related to a Fraday shield that is typically assumed to be necessary (1 below). I might also discuss possible alternative materials for levitation. Hence I would imagine that the talk would revolve around
1. J. Bulling, M. Steiner, J. Pedernales, and M.B. Plenio. Stability thresholds for Gravitationally Induced Entanglement in Shielded Setups. E-Print arXiv:2604.2259
2. T. B. Lantaño, L. Petruzziello, S.F. Huelga, and M.B. Plenio. Low-Energy Test of Quantum Gravity via Angular Momentum. Quantum 10, 2042 (2026)
3. R. Pietsch, L. Petruzziello and M.B. Plenio. A post-Newtonian Gravitational Collapse Model from Linearized Gravity. E-Print arXiv:2605.012172
3. M. Steiner, J. Pedernales, and M.B. Plenio. Optically Hyperpolarized Materials for Levitated Optomechanics. Quantum 9, 1928 (2025)