A better way to charge a quantum battery

Francesco Campaioli, Felix A. Pollock, Sai Vinjanampathy

Rachel J. Berkowitz

A Better Way to Charge a Quantum BatteryCoupling the charger and battery to a common reservoir induces a direct flow of energy into the battery.

A. Alfehaid, H. Alfehaid, N. Metwally

The effects of Gaussian, step, and circular pulses on the charging dynamics of a simplified quantum battery model are analyzed. The stored energy is evaluated, where the results indicate that the interaction parameters can be used as effective control variables to optimize the charging process efficiency. The obtained results show that using the circular pulse is much better than the Gaussian pulse, where the empty battery will be fully charged. Also, in the presence of the step pulse, the charging process will be implemented only during the pulsing time. Moreover, the degree of purity of the battery has no impact on the amount of energy stored. In this paper, we analyze a simple charging model using different pulses to understand how quantum control can improve the charging performance. However, the classical batteries can exploit quantum properties such as superposition and entanglement to achieve faster and higher efficiency. On the other hand, quantum batteries are an emerging concept in quantum technology that aims to store and release energy using the principles of quantum mechanics, which are the basic laws governing the behavior of matter and energy at the level of atoms and subatomic particles. And indeed, by studying quantum batteries, we can find new and faster ways to power small devices, quantum computers.

Oscar Bohórquez

Dario Ferraro, Fabio Cavaliere, Marco G. Genoni +2 more

Dayang Zhang, Shuangquan Ma, Yunxiu Jiang +3 more

With the rapid development of quantum science and technology, quantum batteries have also emerged. However, there are still many unresolved issues in the field of quantum batteries. For example, how to improve battery space utilization, maximize battery energy storage, and how to increase and control the charging power of quantum batteries. A major challenge is how to achieve better charging power without reducing the energy storage of the quantum batteries. Here, we propose a controllable dual-cavity quantum battery which can increase the charging power without diminishing capacity of the quantum batteries by manipulating the number of atoms . This control method can effectively adjust the charging power of quantum batteries from $N^2$ times to $N^2.5$ times, and even to $N^3$ times. By adjusting the number of atoms, quantum batteries can achieve theoretical "fast charging" and "slow charging".