Mojaveri B, Jafarzadeh Bahrbeig R, Fasihi M A, Babanzadeh S
Department of Physics, Azarbaijan Shahid Madani University, PO Box 51745-406, Tabriz, Iran.
Sci Rep. 2023 Nov 14;13(1):19827. doi: 10.1038/s41598-023-47193-7.
The performance of open quantum batteries (QBs) is severely limited by decoherence due to the interaction with the surrounding environment. So, protecting the charging processes against decoherence is of great importance for realizing QBs. In this work we address this issue by developing a charging process of a qubit-based open QB composed of a qubit-battery and a qubit-charger, where each qubit moves inside an independent cavity reservoir. Our results show that, in both the Markovian and non-Markovian dynamics, the charging characteristics, including the charging energy, efficiency and ergotropy, regularly increase with increasing the speed of charger and battery qubits. Interestingly, when the charger and battery move with higher velocities, the initial energy of the charger is completely transferred to the battery in the Markovian dynamics. In this situation, it is possible to extract the total stored energy as work for a long time. Our findings show that open moving-qubit systems are robust and reliable QBs, thus making them a promising candidate for experimental implementations.
由于与周围环境相互作用而产生的退相干严重限制了开放量子电池（QB）的性能。因此，保护充电过程免受退相干对于实现量子电池至关重要。在这项工作中，我们通过开发一种由量子比特电池和量子比特充电器组成的基于量子比特的开放量子电池的充电过程来解决这个问题，其中每个量子比特在独立的腔库中移动。我们的结果表明，在马尔可夫和非马尔可夫动力学中，包括充电能量、效率和熵功率在内的充电特性都随着充电器和电池量子比特速度的增加而有规律地增加。有趣的是，当充电器和电池以更高的速度移动时，在马尔可夫动力学中充电器的初始能量会完全转移到电池中。在这种情况下，有可能在很长一段时间内将存储的总能量提取为功。我们的研究结果表明，开放的移动量子比特系统是稳健且可靠的量子电池，因此使其成为实验实现的有前途的候选者。
