Affiliation: | 1. School of Science, Tianjin University of Technology, Tianjin, 300384 China;2. School of Physics, Beihang University, Beijing, 100191 China;3. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 China;4. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 China School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100190 China Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808 China |
Abstract: | The charging process of a quantum battery (i.e., a two-level system) is studied in two scenarios, that is, a quantum battery and a charger are coupled to the common reservoir environments or coupled to their respective independent environments. In the common reservoir scenario, it is shown that the optimal charging process can be realized by increasing the number of environments and setting the same coupling strength between battery-reservoirs and charger-reservoirs. In the independent reservoir scenario, however, it is shown that decreasing either the number of reservoir environments or the coupling strength would enhance the charging performance. These results demonstrate that the charging performance of quantum batteries can be significantly improved by constructing common environments. This may be of help to the realization of the quantum battery with optimal charging performance in multiple environments. |