A new theoretical study, posted as an unreviewed preprint on arXiv, examines so-called extended nonreciprocal quantum batteries — systems in which energy flow between charger and battery is deliberately asymmetric. The authors argue this asymmetry confers measurable advantages over conventional, reciprocal charging schemes in both energy storage capacity and charging power.
The paper identifies resonance between the charging system and an external pump as a critical condition for sustaining high stored energy and high power. It further claims that, in weakly localized environments, single- and multi-threaded nonreciprocal charging can approach near-infinite steady-state energy storage — a result the authors attribute to the directionality enforced by nonreciprocity. They also report that nonreciprocal architectures strike a balance between charging cost and storage capacity that reciprocal designs cannot replicate.
These findings are purely theoretical at this stage, and the manuscript has not yet undergone peer review. The work adds to a growing body of literature exploring quantum thermodynamic devices, but independent verification of the claimed scaling behaviors and practical feasibility remain open questions.