Optimizing Ergotropy in a Two-TLS Quantum Battery
Choirun Nisaa Rangkuti (a,b*), Muhammad Shoufie Ukhtary (b)

a) Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok 16424, Indonesia
*choirun.nisaa[at]sci.ui.ac.id
b) Research Center for Quantum Physics, National Research and Innovation Agency (BRIN), South Tangerang 15314, Indonesia

Abstract

This study introduces a model of a quantum battery composed of two key components: a charger and an energy holder. The charger is driven by a short laser pulse, which facilitates the energy transfer process. The model employs a two-level system, or qubit, as the energy holder, with a focus on optimizing ergotropy-the amount of work that can be extracted-by fine-tuning the interaction between the charger and the energy holder. A key aspect of the research is the exploration of the ^exceptional point,^ a critical factor that influences the battery^s behavior, dividing it into two distinct operational modes. This bifurcation impacts the efficiency of the charging and discharging processes, playing an important role in understanding and potentially enhancing the optimization of ergotropy in quantum battery performance.

Keywords: quantum battery- ergotropy- exceptional point

Topic: Physics