Phys.org August 24, 2022
An international team of researchers (Italy, South Korea) revisited micromaser, a quantum mechanical system, that has been studied heavily in the past. They showed that micromasers have features that allow them to serve as excellent models of quantum batteries. However, one of the main concerns was that using electromagnetic field to store energy is that in principle, the electromagnetic field could absorb an enormous amount of energy. But their numerical results showed that this cannot happen in micromasers, the electromagnetic field reaches a steady state, and its energy can be determined and decided a priori when building the micromaser. This property ensures protection from the risks of overcharging. The final configuration of the electromagnetic field does not bring memory of the qubits that have been used during the charging which ensures that all the energy stored in the battery can be extracted and used whenever necessary, without the need of keeping track of the qubits used during the charging process. The process is robust and not destroyed by changing the specific parameters defined in the study. According to the researchers this platform can be used to build quantum batteries…read more. TECHNICAL ARTICLE
Two examples of “quantum phones”, both charged by quantum batteries based on electromagnetic fields….Credit: Institute for Basic Science