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Superabsorption

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technology1 month ago•4 min saved

Quantum battery charges in femtoseconds but stores only tiny energy

A CSIRO-led team built a prototype quantum battery that charges in femtoseconds via a superabsorption effect in an optical microcavity, but it stores only a nanoscopic amount of energy for nanoseconds. While not ready to power devices, the work proves rapid energy absorption and extraction is possible and points to potential uses in quantum hardware and faster energy delivery, with ongoing efforts to boost capacity, storage time, and scalability through hybrid quantum-classical designs and linking multiple cells, all at room temperature.

via TechSpot|

#energy-storage #femtoseconds #quantum-battery

technology1 month ago•14 min saved

Quantum batteries defy charging rules by charging faster as they grow

Scientists at CSIRO have unveiled the world’s first working quantum battery prototype that charges faster as its size increases due to a quantum effect called superabsorption inside an optical microcavity. The setup enables femtosecond charging and nanosecond energy storage at room temperature, offering a proof of concept that quantum devices could be powered more efficiently—and perhaps someday energize everyday gadgets. However, the energy stored today is tiny, and challenges like decoherence and energy extraction remain, leaving the path to practical, large-scale use uncertain and likely focused on quantum computing first.

via BBC|

#energy-storage #optical-microcavity #quantum-battery

technology5 months ago•60 min saved

Laser-charged quantum battery could store years of energy from a minute’s charge

A team led by the University of Melbourne and CSIRO built a miniature quantum battery that stores energy via quantum coherence in a microcavity (Dicke model); by firing a laser pulse with a 31‑nm bandwidth for a femtosecond (one quadrillionth of a second) they trigger a giant absorption event that charges the battery ultrafast, enabling it to hold a charge for about a million times longer than the charge time—roughly years after a one‑minute charge. Scaling up could allow remote laser charging for drones or quantum computers, though decoherence remains a key challenge.

via Live Science|

#laser-pulse #quantum-battery #quantum-coherence