Hidden entanglement survives decoherence, new simulations from Ulm University suggest

Yi-Xuan Wang, Julen S. Pedernales, and Martin B. Plenio analyzed how strictly local quantum error correction could restore entanglement affected by various noise types, including those predicted by collapse models like GRW and CSL. Their work establishes that, for GRW- and CSL-type noise, the ratio of gravitational interaction strength to decoherence can be made arbitrarily large, even as the initial entanglement signal diminishes. These results reveal that lost entanglement does not necessarily mean a lost resource, suggesting pathways for future practical recovery protocols. Strictly local quantum error correction can amplify gravitational interaction strength relative to decoherence, even when initial entanglement signals diminish to negligible levels, according to new analyses at Ulm University. This enhancement applies specifically to Newtonian gravity impacted by GRW- and CSL-type noise demonstrating a surprising resilience of entanglement to these environmental disruptions. The Ulm University team framed their investigation around the distinction between separable and non-separable dynamical maps, important for identifying gravitational models…