Efficient charging of quantum batteries via non-Markovian squeezed reservoirs
Phys. Rev. A 113, 022615 – Published 19 February, 2026
DOI: https://doi.org/10.1103/msh1-b1cc
Abstract
Although quantum resources such as entanglement and coherence have been utilized to enhance energy transfer from a quantum charger (QC) to a quantum battery (QB), squeezing remains a powerful yet underutilized resource in the charging process that warrants further exploration. Using pseudomode theory, we analyze the influence of a non-Markovian squeezed reservoir on charging performance under three protocols: (1) direct reservoir-mediated charging, (2) a hybrid scheme combining direct QC-QB interaction with reservoir-mediated coupling, and (3) the reservoir acting only as a charging environment. For a single non-Markovian squeezed reservoir, increasing the squeezing strength enhances the average charging power across all three scenarios—in contrast to its distinct effects on stored energy and extractable work under protocols (1) and (2). Within protocol (2) we identify an optimal phase for the direct QC-QB interaction that maximizes QB performance. Under protocol (3), stronger squeezing strength simultaneously improves the energy storage, average charging power, and extractable work. When extending the analysis to multiple squeezed reservoirs, we find that increasing their number further amplifies the average charging power in every protocol. These results provide a theoretical foundation for achieving high-performance QB charging through the use of non-Markovian squeezed reservoirs.
