2025-05-13 理化学研究所
トポロジカル量子電池の概略図
＜関連情報＞
- https://www.riken.jp/press/2025/20250513_2/index.html
- https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.134.180401
トポロジカル量子電池 Topological Quantum Batteries
Zhi-Guang Lu, Guoqing Tian, Xin-You Lü, and Cheng Shang
Physical Review Letters Published: 6 May, 2025
DOI: https://doi.org/10.1103/PhysRevLett.134.180401
Abstract
We propose an innovative design for quantum batteries (QBs) that involves coupling two-level systems to a topological photonic waveguide. Employing the resolvent method, we analytically explore the thermodynamic performance of QBs. First, we demonstrate that in the long-time limit, only bound states significantly contribute to the stored energy of QBs. We observe that near-perfect energy transfer can occur in the topologically nontrivial phase. Moreover, the maximum stored energy exhibits singular behavior at the phase boundaries, where the number of bound states undergoes a transition. Second, when a quantum charger and a quantum battery are coupled at the same sublattice within a unit cell, the ergotropy becomes immune to dissipation at that location, facilitated by a dark state and a topologically robust dressed bound state. Third, we show that as dissipation intensifies along with the emergence of the quantum Zeno effect, the charging power of QBs experiences a temporary boost. Our findings offer valuable guidance for improving quantum battery performance in realistic conditions through structured reservoir engineering.
