How to Braid Atoms to Save a Quantum Battery ⚡ экспресс
Decoherence, caused by interaction with the environment, leads to irreversible energy loss and degradation of quantum batteries. A charging protocol is proposed using non-local coupling of giant atoms: both the battery and the charger are realized as superconducting giant atoms with multiple points of non-local coupling to a common microwave waveguide. In the braided configuration, where the coupling paths are spatially interleaved, dynamics insensitive to decoherence emerge: destructive interference between dissipation channels suppresses unwanted losses, preserving coherent energy transfer. Separated and nested configurations are inferior to the braided one. A chiral scheme for directed long-distance charging is developed, with the possibility of flow inversion via magnetic flux modulation. The results provide a basis for creating decoherence-resistant charging protocols and remote chiral quantum batteries in circuits with engineered giant atoms.
Quantum batteries lose energy due to entropy — the tendency toward disorder. Just as parallel wires pick up interference, the battery's contacts with the environment create leakage channels. The solution: braid the giant atoms, which act as both charger and storage, into a braid. In this intertwined state, the connection points with the waveguide cancel out parasitic waves: the crest of one meets the trough of another, and the leak vanishes. Meanwhile, the useful energy flow zips along at nearly the speed of light, unbothered by interference.
A surprising bonus: by changing the magnetic field, you can turn the battery into a quantum 'diode' that allows energy to flow in only one direction. Although these devices are still beyond the Standard Model of physics, they pave the way for long-lasting energy storage.
🎯 Quantum batteries charge faster the larger they are — contrary to common sense.
🎬 The idea of lossless batteries recalls the technology from 'Star Trek': energy is transmitted through waveguides over vast distances without leaks.