Bacteria Teach Quantum Batteries to Store Light ⚡ экспресс
Inspired by bacterial light-harvesting complexes, physicists have modeled a quantum battery where collective states play a key role: “quiet” (subradiant) for energy storage and “loud” (superradiant) for its release. Introducing an optical cavity helped hold the charge. It turned out that the coupling strength between components affects the balance between capacity and power: too strong coupling improves storage but reduces useful output. Surprisingly, the extractable useful work (ergotropy) can exceed the nominal capacity and grows linearly with system size, while optimal parameters are observed for small structures.
The quantum battery works like a sponge that absorbs light but won't release it without a forced squeeze. The inspiration came from bacteria's natural solar traps: capturing solar photons, they transfer energy almost losslessly, as proven by spectroscopy. Physicists recreated this principle by assembling atoms into a ring and placing them in a mirrored cavity. The collective behavior of the atoms created a one-way valve effect: energy easily enters, but the way back is blocked. This achieves entropic irreversibility — a concept developed by Ludwig Boltzmann.
This effect arises from quantum connections between the atoms. Regular batteries lose energy with each charge, but the quantum version promises near-perfect efficiency. The size of the ring affects performance: small rings deliver power faster, while large ones store more. With weak coupling to the cavity, output increases, but strong coupling turns the battery into a simple buffer.
Bacteria mastered this trick billions of years ago, transferring light with efficiency close to 100%. Now engineers dream of creating gadgets that charge in an instant and hold their charge forever.
🎯 Bacterial light traps transfer energy with 100% efficiency, without losses or heating — still an unattained dream of energy technology.