Achieving identical stored energy across multiple charges has long been hampered by inherent randomness within quantum batteries. Now, an adaptive measurement protocol demonstrably suppresses these trajectory-dependent fluctuations entirely when the charger begins in its excited state. This represents a move beyond merely mitigating variation and towards genuinely uniform performance, a feat previously unattained even with linear feedback techni…
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New research defines the limits of quantum battery stability and shows how charging methods can balance high charging power with stability. The results are an important step towards developing practical quantum energy storage devices.