2026/02/17 by Anna Pavone, Federico Luigi Cavagnaro, Matteo Carrega +3
Engineering · #Advanced battery technologies research #Advancements in Battery Materials #Advanced Battery Materials and Technologies
paper · pdf · doi:10.1103/rdhw-9kh3
Quantum batteries—miniaturized devices able to store and release energy on demand—are promising both because their intrinsic energy and timescales can match those of other quantum technologies and due to the intriguing possibility of achieving superextensive charging power. While this enhanced scaling is known to appear in several settings, it is generally believed to be forbidden in Jordan-Wigner integrable spin chains charged via quantum-quench protocols. Here, we show that an extended cluster-Ising model, despite belonging to the above category, exhibits superextensive charging power over wide ranges of system sizes, reaching up to a thousand spins, in proper parameter regimes. This remarkable anomalous scaling is due to a corresponding superextensive growth of the stored energy, implying that it is limited to a large but finite size of the system and cannot persist in the thermodynamic limit. This phenomenon appears robust against finite-temperature effects.