Researchers have presented a theoretical model of a quantum battery that can work without energy loss.
It is a nanoscale device,intended for use in equipment based on quantum technologies. According to scientists from the universities of Alberta and Toronto, although, unlike existing batteries, quantum mechanics rather than electrochemistry is the basis of his work, in practice it can be made from modern solid materials.
During the study, the group reviewed the model open quantum network with high structural symmetry as a platform for storage of exciton energy. Scientists have shown that the charge can be stored without loss even in an open system.
To do this, a quantum network must be prepared incalled the dark state, when it cannot exchange energy with the environment. This makes such a system immune to any external influences, preventing the loss of energy.
Using this model, the researchers proposed a general method of discharging the energy stored in a quantum accumulator on demand, by means of a controlled violation of the structural symmetry of the network.
In the future, the group will study practical methods of charging and discharging, as well as methods for scaling the device for real applications.
Quantum technologies are developing rapidly. Recently, physicists have successfully transmitted quantum entanglement between matter and light to a distance of 50 km using fiber optic cable, which opens the way to the creation of long-distance quantum networks.</p>